Bundle compiled with Intel 19 Compiler. win32 compile should work on XP, or later. This a point release with NO changes to the encoding library. The internal mpglib decoding library has been replaced with the libmpg123 decoding library.
LAME 3.100.1 under construction
Patch submitted by KO Myung-Hun, patch ticket [ #80 ] OS/2 patches
Patch submitted by Elio Blanca, patch ticket [ #82 ] Take advantage of terminal width on printing file names
Bug fix for item [ #496 ] A critical bug in init_xrpow_core_sse
Bug fix for item [ #500 ] Buffer overflow in encoder
Bug fix for item [ #501 ] Encoder: Assertion 'eov->bitrate_index <= cfg->vbr_max_bitrate_index' failed during ABR encoding
Bug fix for item [ #444 ] msacmdrv.h (structure packing alignment)
Add faster CRC routine. The speed improvement is very small for typical use cases, but may be valuable if a lot of independent encodes are running and/or for a very long time. Patch by Robert Kausch of the fre:ac project.
Fix configure script glob-ranges matching of compiler versions. This may result in faster code if no compiler optimization flags are specified during the configure step. This is part of patch ticket [ #491 ] lame 3.100 slower than 3.99.5
Disable Takehiros IEEE753 hack by default. On modern CPUs (anything more recent from AMD than hammer/k8; Intel: Core2, i3/5/7/9 and similar -- no idea about recent Atom/Pentium) it is a speed pessimization. Add a configure option for it so that it can be enabled on old CPUs.
Update to more recent autotools based scripts, this may or may not fix issues during the configure stage for less popular or more recent OS or architectures.
LAME 3.100 2020-04-09
Bundle compiled with Intel 19 Compiler. SVN update as of 2020-04-09.
LAME 3.100 2019-08-06
Bundle compiled with Intel 19 Compiler. SVN update as of 2019-08-06.
LAME 3.100 2019-07-22
Bundle compiled with Intel 19 Compiler. Includes the "Bug fix for item #501. Should work on XP, or later.
LAME 3.100 2019-07-03
Bundle compiled with Intel 19 Compiler. Includes the "Bug fix for item [ #500 ] Buffer overflow in encoder". Should work on XP, or later.
LAME 3.100 October 13 2017
Don't include the debian directory as one that is needed during builds. Patch taken from Debian's packaging of lame.
Resurrect Owen Taylor's code dated from 97-11-3 to properly deal with GTK1. This was transplanted back from aclocal.m4 with a patch provided by Andres Mejia. This change makes it easy to regenerate autotools' files with a simple invocation of autoconf -vfi.
Fix possible race condition causing build failures in libmp3lame. Discovered in automated builds by the Debian project with patch provided by Andres Mejia.
Improved detection of MPEG audio data in RIFF WAVE files. Tracker item [ 3545112 ] Invalid sampling detection
New switch --gain <decibel>, range -20.0 to +12.0, a more convenient way to apply Gain adjustment in decibels, than the use of --scale <factor>.
Fix for tracker item [ 3558466 ] Bug in path handling
Fix for tracker item [ 3567844 ] problem with Tag genre
Fix for tracker item [ 3565659 ] no progress indication with pipe input
Fix for tracker item [ 3544957 ] scale (empty) silent encode without warning
Fix for tracker item [ 3580176 ] environment variable LAMEOPT doesn't work anymore
Fix for tracker item [ 3608583 ] input file name displayed with wrong character encoding (on windows console with CP_UTF8)
Fix for bug ticket [ #447 ] Fix dereference NULL and Buffer not NULL terminated issues. Thanks to Surabhi Mishra
Fix for bug ticket [ #445 ] dereference of a null pointer possible in loop. Thanks to Renu Tyagi
Fix for bug ticket [ #449 ] Make sure functions with SSE instructions maintain their own properly aligned stack. Thanks to Fabian Greffrath
Fix for bug ticket [ #458 ] Multiple Stack and Heap Corruptions from Malicious File. Thanks to Gareth Evans and Elio Blanca
Fix for bug ticket [ #460 ] A division by zero vulnerability. Thanks to Wang Shiyang, Liu Bingchang
Fix for bug ticket [ #461 ] CVE-2017-9410 fill_buffer_resample function in libmp3lame/util.c heap-based buffer over-read and ap
Fix for bug ticket [ #462 ] CVE-2017-9411 fill_buffer_resample function in libmp3lame/util.c invalid memory read and application crash
Fix for bug ticket [ #463 ] CVE-2017-9412 unpack_read_samples function in frontend/get_audio.c invalid memory read and application crash
Fix for bug ticket [ #434 ] clip detect scale suggestion unaware of scale input value
HIP decoder bug fixed: decoding mixed blocks of lower sample frequency Layer3 data resulted in internal buffer overflow (write). Thanks to Henri Salo
Feature request, patch ticket [ #27 ] Add lame_encode_buffer_interleaved_int() by Michael Fink
Bundle compiled with Intel Compiler 14.0.3.
LAME 3.99.5 February 28 2012
autotools: Fix compilation on alpha using proper ifdef guards. Thanks to Andres Mejia.
Small correction of the documentation.
Workaround for cygwin build problem. Tracker item [ 3480692 ] mingw-w64 compilation error
Fix for a problem when LAME is compiled with fast floating point math. It could result in bitrate bloat with silent input data.
Bug fix for tracker item [ 3486753 ] Artifacts at the beginning of decoded file
Bundle compiled with Intel Compiler 12.1. (32 bit compile updated 20120130 to correct compiler options.)
LAME 3.99.4 January 25 2012
Fix for tracker item [ 3475581 ] lame crashes at .w64 input file
Addressing things brought to attention by tracker item [ 3463197 ] 3.99.x problem WFED and PCST frames
WFED and PCST frames can now be added, to tag podcasts iTunes recognizes
USER frames are now supported
COMM frames can now have a description, when passed via --tv "COMM=description=full text"
possible divide-by-zero exception should be fixed
adding malformed user-defined-frames could result in abnormal program termination, fixed
LAME 3.99.3 November 26 2011
Fix for tracker item [ 3441349 ] --tg does not handle genre number when adding unicode tag
LAME 3.99.2 November 18 2011
Due to some bugs in 3rd party HW/SW decoders, those were not be able to make use of LAME's extended info tag anymore, resulting in problems with things like gapless playback.
LAME 3.99.1 November 05 2011
Fixes for several issues with ID3v2 unicode tags, using Big-Endian text encodings. Because of several other software (like Windows Media Player), LAME writes Little-Endian unicode tags only.
Thanks to Taihei Monma, for reporting these issues. Tracker items: [ 3431203, 3431222, 3431241 ]
LAME 3.99 2011-11-01
Bundle compiled with Intel Compiler 11.1.
LAME 3.99 2011-10-18
Bundle compiled with Intel Compiler 11.1.
LAME 3.99 October 15 2011
3.99 beta 1 becomes 3.99
LAME 3.99 beta 1 not yet released
Fix for Bugtracker item [ 3395813 ] id3tag_set_fieldvalue for URL link frames Broken
Fix for Bugtracker item [ 3368977 ] Wave Parser doesn't pad chunks
Fix for Bugtracker item [ 3034259 ] confusing fatal error: can't update LAME-tag frame!
LAME 3.99 beta 0 not officially released
Josep Maria Antolín Segura
Improve Debian packaging.
Include suggestions made by Fabian Greffrat
Update version of the Debian package to reflect that it is taken from CVS.
Get rid of a transitional package
Much more to come...
Minor fix to validate the history file correctly
Porting of LAME mp3rtp program to Windows platform
Fix: for free format mp3 above 320 kbps, the maximum allowed bits was limited too far.
Changed behaviour: LAME replaces common suffixes by MP3/WAV when no output filename was given. For example, a simple lame x.wav will create output file x.mp3
UNICODE support on Windows OS, file names and ID3v2 tags; related: Bugtracker item [ 3052230 ] Lame.exe can't find files with non-ASCII names
Added support for WAVE FORMAT IEEE FLOAT input files
New switch --swap-channel added, see tracker item [ 1118412 ] RFE: option to swap L and R channels
New switches -m l and -m r to select either left or right channel for mono encoding.
Feature request item [ 3134258 ] Allow larger images with LAME (>128KB)
Fix for Bugtracker item [ 2962223 ] Encoder delay and padding values ignored when re-encoding
Fix for Bugtracker item [ 2986823 ] Error when building Lame with NASM support -still exists
Fix for Bugtracker item [ 3125235 ] make -f Makefile.mingw32 fails
Fix for Bugtracker item [ 3021935 ] ID3 tag TXXX cannot be used more than once
Fix for Bugtracker item [ 3025801 ] gain_analysis.h needs int constants
Fix for Bugtracker item [ 3277412 ] Segmentation fault at layer2.c:105 with --decode
Changes in new VBR code:
tuning on PSY model
tuning on VBR scale and resulting bitrates
Minor bug fix for sfb21 encoding
All encoding modes use the PSY model from new VBR code, addresses Bugtracker item [ 3187397 ] Strange compression behavior
Fix for a possible out of bounds array access in HIP decoder, addresses Bugtracker item [ 3091776 ] crash at III_dequantize_sample
LAME 3.98.4 March 22 2010
* Joseph Flynn
o Improvements for LAME DirectShow filter:
+ Added support for the DirectShow IAMStreamConfig Interface to the LAME encoder filter output pin.
+ Modified the DirectShow filter registration section so that the LAME Encoder filter is correctly registered in the Audio Compressors filter category. This will allow third-party encoding applications using the DirectShow System Device Enumerator Interface to correctly detect the LAME encoder when querying the Audio Compressors filter group.
+ Modified the filter registration information so that the MP3 audio subtype is correctly reported as being supported on the encoder output pin. This will allow third-party encoding applications using the DirectShow IFilterMapper2 Interface to recognize that the LAME encoder supports MP3 output.
+ Altered the Filter Merit Value that was being used when the filter was registered so that it is now using the standard DirectShow compressor filter merit value of MERIT_DO_NOT_USE (0x200000). Previously, the filter was being registered using a value of MERIT_SW_COMPRESSOR (0x100000), which was at a lower priority (i.e. worse priority) than MERIT_DO_NOT_USE. This prevented the LAME Encoder filter from being selected for use by some third-party encoding applications.
+ Added code to calculate the frame length of the audio frames used for the nBlockSize element of the WAVEFORMATEX output structure. Previously this value was simply hard-coded to 1.
* Robert Hegemann
o Fix for Bugtracker item [ 2973877 ] A problem regarding the new drain code
LAME 3.98.3 February 27 2010
* Rogério Brito:
o Update the debian packaging for the new release.
* Robert Hegemann
o The ignore-tag-errors switch had no effect when embedding album art, fixed.
o Library API change: lame_decode functions are now obsolete but still present, please use hip_decode instead. The reason for this change is: lame_decode functions use a single global variable within the library to store decoder setup, hip_decode functions don't. The encoder now uses hip_decode internally and it is now possible to use clipdetect feature while reencoding mp3 to mp3.
o Workaround for FFMPEG bug, which uses to call lame_encode_flush more than once in a loop.
o Windows: program icon and version info added (when building with VC9)
o Fix for Bugtracker item [ 2688413 ] lib name problem in Microsoft Visual Studio 6
o Fix for Bugtracker items [ 2051870, 2423650, 2928684 ] several small documentation issues
o Fix for Bugtracker item [ 2723518 ] resampling in 3.98 and 3.99alpha
o Fix for Bugtracker item [ 2891879 ] Because of Windows API change, there was a problem with the prority switch.
o Fix for Bugtracker item [ 2893101 ] Access Violation in BladeMP3EncDLL if UNICODE was defined.
o Fix for Bugtracker item [ 2887359 ] Wrong length in ID3v2 tag when num_samples isn't set
o Fix for Bugtracker item [ 2872590 ] LameTAG: "Music length" missmatch in LAME 3.98
o Fix for Bugtracker item [ 2824296 ] wrong enc_padding value in LAME 3.99a and 3.98.3 (from CVS)
o Revisiting the FhG decoder problem (FhG V1.5 build 50, ships with MS Windows): enabling the new-drain-code seems to solve that issue better, than restricting the buffer size (see below: 3.98 beta 1, May 16 2007).
o Patch submitted by Bernhard Doebler, tracker item [ 2807676 ] Error when building Lame with NASM support
o Patch submitted by Mancuso Raffaele, tracker item [ 2406420 ] compile lame_enc.dll under cygwin
LAME 3.99 alpha 1 not yet released
* Robert Hegemann
o The ignore-tag-errors switch had no effect when embedding album art, fixed.
o Library API change: lame_decode functions are now obsolete but still present, please use hip_decode instead. The reason for this change is: lame_decode functions use a single global variable within the library to store decoder setup, hip_decode functions don't. The encoder now uses hip_decode internally and it is now possible to use clipdetect feature while reencoding mp3 to mp3.
* Rogério Brito
o Improve Debian packaging.
+ Include suggestions made by Fabian Greffrat
+ Update version of the Debian package to reflect that it is taken from CVS.
+ Get rid of a transitional package
+ Much more to come...
o Minor fix to validate the history file correctly
* Rogério Brito:
o More fixes for the abx tool for Unix systems:
+ Plugged a memory leak.
+ Fixed an endianness problem: users of big-endian machines can now do abx tests.
o Fixed history's HTML doctype
o Fixed history so that it finally validates at W3's validator
o Fixed compilation of frontend mp3rtp.c. Thanks to Kris Karas. Bugtracker item [ 2015432 ] mp3rtp missing uint16_t in lame 3.98
* Robert Hegemann:
o Fix for Bugtracker item [ 2031704 ] --id3v1-only didnt work in 3.98-final
o Fix for Bugtracker item [ 2022035 ] encoder_padding value and resampling
o Fix for Bugtracker item [ 2029282 ] Frequency filtering API broken in 3.98
o Fix for Bugtracker item [ 2039648 ] potential memory leak in parse_args() function in parse.c
o Fix for some tagging issues:
+ Made search for ID3v1 genres more sloppy, abbrevations may match more often as some simple typos. Examples:
# --tg "Alt. Rock" matches genre "Alternate Rock"
# --tg "acapela" matches genre "A Cappella"
+ New switch --pad-id3v2-size "n": adds ID3v2 tag with n padding bytes.
LAME 3.98 July 4 2008
* Anton Sergunov:
o Frontend DirectShow: enabling LAME dshow filter to connect to "File Writer Filter".
* Rogério Brito:
o Updates to the Debian Packaging
o Fixes to the abx tool for Unix systems (so that more people can evaluate LAME's compression against the original files)
* Alexander Leidinger:
o explicitely link the math lib to the lame lib
o add switch to disable the use of the compaq optimized math lib
LAME 3.98 beta 8 April 13 2008
* Robert Hegemann:
o LAME now accepts a floating point value in the range [0,...,10[ as VBR quality setting, like -V5.678
o Found and fixed some suspicious code in additive masking calculation for VBR-NEW
o bug-fix:experimental code was defaulted by accident for VBR-NEW
o fix for some endianess problem on big-endian machines
LAME 3.98 beta 7 April 6 2008
* Robert Hegemann:
o libmp3lame API: allow frontends to separately retrieve LAME/Xing and ID3 data, because the old library automatism makes it impossible to make fully buffered encodes.
o libmp3lame API: added some experimental unicode ID3 tagging code.
o frontends: write itself final ID3 tags and LAME/Xing header frame
o lame_enc.dll: writes itself final LAME/Xing header frame
o Latest changes to the new VBR psymodel:
+ uses a different spreading function
+ bug-fix for out-of-bounds array access (program stack corruption possible)
LAME 3.98 beta 6 December 16 2007
* Robert Hegemann:
o Feature request [ 1811483 ] WAVE_FORMAT_EXTENSIBLE support (PCM)
o Fix for some rare scalefactor selection issue the newer vbr code had at low compression levels
o Fix for Bugtracker item[ 1813496 ] AIFF parsing bug
o Latest changes to the new VBR code:
+ it now has its own psy model, a derivation from NSPSY.
+ some more tuning has been done for this new psy model. Many thanks to Horst Albrecht and Myles Thaiss.
+ the "out-of-bits" strategy is reworked
o It was possible, that the "interchannel masking effects feature" was used by the dual-channel-mode for bi-lingual encodings too. It was meant to work on stereo L/R channels only.
LAME 3.98 beta 5 August 12 2007
* Jonathan Stott:
o Bug tracker items: [ 1590693 ] ID3v2 tag not writing, [ 1636267 ] ID3v2 tags overwritten
If the output file is opened 'write-only', then LAME can't update the LAME tag. In this case LAME silently overwrote the first bytes of the file and an optional ID3v2 tag disappeared. Now an error message will be printed and no data is written in this case.
* Robert Hegemann:
o Fix for Bugtracker item [ 1719593 ] Track numbers > 255 not allowed even with --id3v2-only
o Fix for Bugtracker item [ 1742623 ] fail(lame --mp3input -m m -b 128 --resample 8 *.mp3 **.mp3)
The problem here was, the input files are MPEG-1 Layer2 files named as MP3s. Even if you leave out the --mp3input switch LAME tried to decode the input files as Layer3 files because of the file name extension and because it found some valid looking Layer3 synchronization header. The fixed LAME version does not assume the file name extension is always correct and treats the files depending on the first found MPEG sync word. The files in question are now correctly detected as Layer2 files and transcoding does succeed.
o Fix for Bugtracker item [ 1445175 ] Input being stdin fails in Windows on WAV files
The problem here was, seeking on pipes shows some different behaviour depending on C-Library implementations. The workaround tries to detect it's working on a pipe and doing some reading instead of seeking in that case.
o Fixing some memory leak in the 'lame_enc.dll'.
o Fix for Bugtracker items [ 1160757, 1160741 ] --little-endian / --big-endian not working
These switches where originally intended to be used together with Libsndfile only.
o Fix for Bugtracker item [ 1746336 ] Incorrect Bitrate with ABR und --resample, LAME 3.98b4
Some earlier bug-fix had some typo. As a result, when adding a '--resample 123' switch, the average bitrate rised upto maximum bitrate.
LAME 3.98 beta 4 June 23 2007
* Dennis Lambe Jr: Added support for total track count (id3v2) in the frontend
o Ability to set user-defined ID3v2.3 frame
o Ability to include albumArt in ID3v2.3 tag
* Robert Hegemann:
o Bugfix: the "play length in ms", which is stored in the ID3v2 tag TLEN, was not correctly computed. Some hardware and software players were confused by this garbage data.
o Out of bits strategy for the newer VBR code overhauled
o LAME API: the ID3 tag functions do not store the pointers passed anymore, they do make deep copies of strings passed as parameters.
o Changes in LAME frontend switches regarding ID3 tags:
--tg "MyGenre" will route unknown ID3v1 genres to "Other" for ID3v1 tags and will be stored as plain text "MyGenre" for ID3v2 tags. Genres given by known ID3v1 numbers will be stored as its corresponding text in ID3v2 tags.
--tn "02/02" will store the track number specified as plain text as-is for ID3v2 tags.
LAME 3.98 beta 3May 22 2007
* Robert Hegemann:
o Fixes regarding max number of bits limitation
LAME 3.98 beta 2 May 20 2007
* Robert Hegemann:
o Bug tracker item: [ 1693461 ]; Fixed memory leaks in ACM codec
o Fixed encoding of non-standard sampling rates in CBR
o Improved VBR strategy when running out of bits
LAME 3.98 beta 1 May 16 2007
* Alexander Leidinger:
o Add TLEN (ID3v2) support (Submitted by: Linus Walleij).
o Add number of total tracks per album (ID3v2) support (Submitted by: Kyle VanderBeek).
o Some seatbelts for overflowing arrays in the ID3v2 support.
o Update the RPM spec (Submitted by: Kyle VanderBeek).
o Fix some mem-leaks in the error case.
o Update to newer autotools versions.
o Update to use a recent libsndfile (submitted by libsndfile author).
o Intrinsics support enabled for gcc
* Robert Hegemann:
o The newer VBR code is now LAME's default VBR routine
o Fixed: in case of not enough bits the new vbr code incorrectly used old vbr routine
o Improved ATH adjustment in low volume cases
o Fixed (PSY model): mapping from convolution bands to partition bands was broken since we replaced tables by own calculation several years ago
o Fixed (PSY model): loss of fraction in equal loudness weighting
o Fixed (PSY model): in NSPSY highpass filter, out of bounds access in fircoef
o Known problem samples for the new VBR code: many of them are at an acceptable quality level now; with a big 'Thank You' to Francis Niechcial
o Modified VBR strategy to handle out of bits cases
o Restricted bitreservoir size for 320 kbps frames to the size used for sideinfo, because of decoding problems with FhG decoders installed on almost every Windows system
o LAME aborts on unsupported input files or unrecognized parameter options passed more often now
o Bug tracker item: [ 1596306 ] "fatal error during initialization"; an invalid MPEG samplerate was returned by optimum_samplefreq function
o Bug tracker item: [ 1585942 ] lame not --silent when TERM not set; in case LAME was build with TERMCAP defined and no TERM environment is defined, now we do not issue an error message and silently fallback to the default behaviour as if LAME was compiled without TERMCAP defined.
o Bug tracker item: [ 1711980 ] LAME writes invalid Xing header when ID3 tags exist; LAME was sometimes writing an invalid Xing/Info header
o Feature request: [ 1588283 ] Flushing output stream in lame.exe; 'flush' option added
o Added FFTSSE and FFT3DNOW assembler code from Lame4 branch
o Changes in lame frontend switches: -k removed, add lowpass and highpass switches if you need to change them; --short/noshort/allshort - degraded into DEVELOPER ONLY switches normal users shouldn't use them; -X -Z degraded to DEVELOPER ONLY switches, -X is too tough to communicate to end users and -Z isn't used actualy
o Fixed some console printing problems
o Windows: ACM code now uses LAME library API only, all references to private include files are removed
o Windows: DirectShow code now uses LAME library API only, all references to private include files are removed
o Windows: disabled code that resets processor affinity, because this doesn't belong to LAME, but seems to work around some problems the parent process has (in most cases EAC)
o Fixed mp2 and mp3 decoding: For mp3 and mp2 decoding, this now yields the same output as foobar2000 but the error checking remains unchanged
* Gabriel Bouvigne:
o VC8 project files
o Added support for x64 under VC8
o Restricted MPEG 2.5 to 64kbps frames
* Takehiro Tominaga:
o SSE version of FFT
LAME 3.98 alpha 7
Bundle: includes lame.exe, lame_enc.dll. (ICL9.1) (Includes the decoding fix for mp3 files and the fix for decoding through stdout. Both now included in CVS.)
LAME 3.97 Release
Bundle: includes lame.exe, lame_enc.dll. (ICL9.1) (Recompiled to include mp2 decoding which was omitted, in error, in the original compile. Otherwise unchanged.)
LAME 3.96.1 July 25 2004
fixed a crash in new vbr mode
some fixes in ACM codec
fixed block size selection for mid and side channels
LAME 3.96 April 11 2004
new quantization selection mode (used in ABR/CBR)
set sfscale for ABR/CBR up to 160kbps
LAME 3.96 beta 2 March 28 2004
removed unnecessary integer convertion in resampling
reworked scalefactor allocation in vbr-new
fixed a freeformat decoding problem
updated minimal bitrate for V1 and V2
added ability to disable ReplayGain analysis
LAME 3.96 beta March 7 2004
fixed decoding issue
changed internal ReplayGain handling
fixed some issues when ReplayGain is used with resampling
added standard ISO quantization for vbr-new, used at lower quality settings
faster count_bits for vbr-new
faster find_scalefac_ave function for vbr-new
fixed an out of array access in psychoacoustic models; this bug could make some psy calculations worthless and sometimes let lame crash
fixed an error on silent scalefactor bands; this bug resulted in huffman data overrun problems while decoding, resulting in audible glitches
fixed a freeformat decoding bug
adjusted short block thresholds
fixed some array addressing bugs
made ReplayGain analysis reentrant
David Chandler: fixed a crash in quantize_xrpow
Michal Bacik: fixed a crash when using 8kHz
Goran Markovic: fixed some decoding bugs
John Edwards: fixed a too small buffer in ReplayGain code
LAME 3.95.1 January 12 2004
fixed a crash when using vbr-new
changed ReplayGain reference level to 89dB
LAME 3.95 January 11 2004
fixed lowpass values when using vbr with mono files
faster quantization loops
fixed a buffer requirement error in ACM codec
fixed mpglib and other decoding support code to prevent the crash when invalid mp3 input
removed Layer I decoding support
use FastLog and IEEE 754 hack on PowerPC too (approx. 10 percent faster)
LAME 3.94 beta December 15 2003
fixed block switching of nspsytune
best huffman divide in the inner loop. This should improve the quality, but PAINFULLY slow. So it is not enabled by default. Use -q0 to use it.
Changed -q option mapping. "-q2" until version 3.93 is now "-q3".
saving bits by better scalefactor storing
removed Vorbis support
substep quantization.This should help breaking the SFB21 bloating problem
made psychoacoustic model aware of ATH adjustements
use ATH value as short block masking lower limit
several fixes in psychoacoustic model
more robust decoding
Mark Taylor / Gabriel Bouvigne: fixed issues in VBR header
Mark Taylor: workaround against some hardware decoder defficiencies
Aleksander Korzynski: ability to compute the "Radio" ReplayGain and detect clipping on the fly. The ReplayGain value is stored in the Lame tag.
work on presets
use presets by default for cbr/abr
use presets by default for vbr
analog silence detection in partitionned sfb21
do not compute noise in upper 0 part of the spectrum
only compute noise in modified scalefactor bands
nogap related changes
prevent closing the input fd prematurely if the input is a named pipe
LAME 3.93.1 December 1 2002
preset medium added to the dll interface
fix for abr/cbr presets
fix -q0 switch
Alexander Leidinger: fix link problem on systems where socket() resides in libsocket
LAME 3.93 November 16 2002
bit allocation for pre-echo control improved for single channel encodings
substep noise shaping
optimizations by changing data structure
noise shaping model 2 fix
nspsytune FIR filter clean up
fix small psymodel bugs(DC current estimation, preecho detection of non-VBR mode, and nspsymode initialization)
portability fixes for Tru64 UNIX
Albert Faber: some fixes in the DLL
Simon Blandford: fixes for channel scaling in mono mode
Dominique Duvivier: some optimizations and a faster log10 function
some tag related fixes in the direct show filter and in the ACM codec
fixed a mono encoding bug found by Justin Schoeman
calc_noise bug fix
update to autoconf 2.53, rewrite some configure tests
Akos Maroy: determine gcc version even with gcc 3.1
Andrew Bachmann: compile shared libs on BeOS (and perhaps other arches)
ultrasparc switches for gcc 3.1
fixes for SunOS 4.x
fixes for 64bit arches
CFLAGS fix for IRIX
don't override CFLAGS if exptopt isn't requested
some fixes for VBR
--noasm switch. Might help Cyrix/Via users
presets and alt-presets merged
LAME 3.92 April 14 2002
Alexander Leidinger: add non linear psymodel (compile time option, disabled by default), workaround a bug in gcc 3.0.3 (compiler options, based upon suggestions from various people, see archives and changelog for more)
Steve Lhomme: ACM wrapper (MS-Windows codec)
Steve Lhomme: less memory copying on stereo (interleaved) input
Takehiro Tominaga: Inter-channel masking, enables with --interch x option
For buggy versions of gcc compiler (2.96*), back off on some of the advanced compiler options
LAME 3.91 December 29 2001
Darin Morrison: Bugfix for --alt-preset (for content with low volume, clean vocals), only important for the "fast standard" preset
add some missing files to the distribution
add --alt-preset to the man page
LAME 3.90 December 21 2001
Many small improvements and bug fixes not added to history
John Dahlstrom: more fine tuning on the auto adjustment of the ATH
Robert Hegemann: small speed and quality improvements for the old VBR code (--vbr-old).
Robert Hegemann: some short block bug fixes
Robert Hegemann: Big improvements to --vbr-mtrh, now encodes much more frequencies over 16khz
Robert Hegemann: --vbr-new code disabled (outdated and lower quality) and replaced with --vbr-mtrh (Both --vbr-new and --vbr-mtrh now default to mtrh)
Robert Hegemann: reordering of --longhelp to give more information, --extrahelp dropped
Darin Morrison: Totally revamped and extremely high quality unified preset system and other general quality improvements now available with --alt-presets:
some improvements to psychoacoustics (vast improvements over default L.A.M.E. modes) when --alt-preset is used including:
Improved tuning of short block usage.
Improved quantization selection usage (the -X modes), now adapts between appropriate modes on the fly. Also helps on "dropout" problems and with pre-echo cases.
Improved joint stereo usage. Thresholds are better tuned now and fix some "dropout" problems L.A.M.E. suffers from on clips like serioustrouble.
Improved noise shaping usage. Now switches between noise shaping modes on the fly (toggles -Z on and off when appropriate) which allows lower bitrates but without the quality compromise.
Clips vastly improved over default L.A.M.E. modes (vbr/cbr/abr, including --r3mix): castanets, florida_seq, death2, fatboy, spahm, gbtinc, ravebase, short, florida_seq, hihat, bassdrum, 2nd_vent_clip, serioustrouble, bloodline, and others. No degraded clips known.
VBR bitrates are now more "stable" with less fluctuation -- not dipping too low on some music and not increasing too high unnecessarily on other music. "--alt-preset standard" provides bitrates roughly within the range of 180-220kbps, often averaging close to 192kbps.
--alt-presets replace the --dm-presets and "metal" preset is removed and replaced with generic abr and cbr presets.
--alt-preset extreme (note the 'e') replaces xtreme to help eliminate some confusion
--alt-preset vbr modes now have a fast option which offers almost no compromise in speed.
--alt-preset standard (and "fast standard") are now much lower in bitrate, matching --r3mix with an overall average, though offering higher quality especially on difficult test samples.
--alt-presets are no longer just "presets" as in a collection of switches, instead they are now quality "modes" because of special code level tunings (those mentioned above).
Use --alt-preset help for more information.
Roel VdB: more tuning on the --r3mix preset
Jon Dee, Roel VdB: INFO tag
Alexander Leidinger, firstname.lastname@example.org: added --scale-l and --scale-r to scale stereo channels independantly
Takehiro Tominaga: new noise shaping mode, offering more "cutting edge" shaping according to masking, enabled via -q0
Mark Taylor: More work on --nogap
Gabriel Bouvigne: Small changes to abr code for more accurate final bitrate
Gabriel Bouvigne, email@example.com: Preliminary ReplayGain analysis code added (not functional yet)
Gabriel Bouvigne, Alexander Leidinger: Documentation updates
John Dahlstrom, DSPguru@math.com: floating point interface function in the Windows DLL
LAME 3.89beta July 5 2001
John Stewart: long filename support for Win9x/NT.
Takehiro Tominaga: LAME can calculate the CRC of VBR header, so now "lame -pv" works fine.
Robert Hegemann: Improvements of the new VBR code (--vbr-mtrh).
Robert Hegemann: New VBR code (--vbr-mtrh) is now defaulted to get more feedback. The VBR speed is now on par with CBR. We will use the old VBR code in the release.
Gabriel Bouvigne: Change of the maximum frame size limit. LAME should now be more friendly with hardware players.
Gabriel Bouvigne: Size of VBR is now more balanced according to the -V value.
Alexander Leidinger: Finished the implementation of the set/get functions.
John Dahlstrom: LAME now handles 24bits input
Mark Taylor: bugs in lame --decode causing truncation of mp3 file fixed
Mark Taylor: preliminary --nogap support
"Final" API completed: shared library safe! This API is frozen and should be backwords compatiable with future versions of libmp3lame.so, but we will continue to add new functionality.
LAME 3.88beta March 25 2001
A lot of work that was never added to the History!
Frank Klemm and Gabriel Bouvigne: New ATH formula. Big improvement for high bitrate encodings.
Takehiro Tominaga: Temporal masking
Gabriel Bouvigne/Mark Taylor: auto adjustment of ATH
Robert Hegemann: Better outer_loop stopping criterion. Enabled with -q2 or better.
Robert Hegemann/Naoki Shibata: slow/carefull noise shaping. -q3..9: amplify all distorted bands. -q2: amplify distorted bands within 50%. -q1-0: amplify only most distorted band at each iteration.
Takehiro Tominaga: Interframe, shortblock temporal masking.
Takehiro Tominaga: LAME restructured into a shared library and front end application. Slight changes to the API. More changes are coming to turn LAME into a true shared library (right now you have to recompile if you upgrade the library :-(
improvements to psychoacoustics (--nspsytune)
BUG in long block pre echo control fixed (some out of range array access in M/S psychoacoustics)
Ralf Kempkens: Visual Basic Script for lame, suggested to put it on your Windows Desktop and you can drag'n'drop Waves to encode on it.
Alexander Stumpf: improved lame.bat for 4Dos users
Mark Taylor: Several bugs fixed in the resampling code.
Frank Klemm, Robert Hegemann: added assembler code for CPU feature detection on runtime (MMX, 3DNow, SIMD)
Takehiro Tominaga: 3DNow FFT code.
Florian Bome, Alexander Leidinger: more work on configure stuff
Alexander Leidinger: automake/libtool generated Makefiles and TONS of other work.
Alexander Leidinger: Much work towards shared library style API.
Anonymous: New more efficient RTP code.
Mark Taylor: psycho-acoustic data now computed for all scalefactor bands (up to 24 kHz)
Mark Taylor, Takehiro Tominaga: All ISO table data replaced by formulas - should improve MPEG2.5 results for which we never had correct table data.
LAME 3.87alpha September 25 2000
Mark Taylor: Bug fixed in LAME/mpglib error recovery when encountering a corrupt MP3 frame during *decoding*.
Albert Faber: added LayerI+II decoding support
Frank Klemm: added improved CRC calculation
Frank Klemm: substantial code cleanup/improvements
Robert Hegemann: Bug fixes
in huffman_init, could lead to segmentation faults (only in rare cases, most likely at lower sample rates)
M/S switching at lower sample rates (the fact there is no 2nd granule was ignored)
Robert Hegemann: speed up in VBR
Jarmo Laakkonen: Amiga/GCC settings for Makefile.unix.
Magnus Holmgren: README and Makefile for (free) Borland C++ compiler. Will also compile lame_enc.dll, but this is untested.
Florian Bome: LAME finally has a ./configure script!!
LAME 3.86beta August 6 2000
Christopher Wise: A makefile for DJGPP, the DOS version of gcc. Now most windows users should be able to compile LAME with minimal effort.
Robert Hegemann: old VBR: fixed some bugs and Takehiro's scalefac_scale feature (not yet on by default.) older LAME versions did not allow to spent more than 2500 bits of 4095 possible bits to a granule per channel, now fixed.
Robert Hegemann: new VBR: analog silence treatment like in old VBR
William Welch: Improved options for Linux/Alpha gcc and ccc compilers in Makefile.
Mathew Hendry: setting appropriate CRC bit for additional Xing-VBR tagging frame
Don Melton: added ID3 version 2 TAG support
John Dahlstrom: fixed bug allowing timing information (for status in command line encoder) to overflow.
Tamito KAJIYAMA, Fixed several bugs in the LAME/Vorbis interface.
Mark Taylor: lame --decode will recognize Album ID tags
Naoki Shibata: Additive masking and other improvements to psycho acoustics. (not yet on by default)
LAME 3.85beta July 3 2000
Takehiro Tominaga: mid/side stereo demasking thresholds updated.
Takehiro Tominaga: New short block MDCT coefficient data structure. Should allow for future speed improvements.
Robert Hegemann: fixed bug in old VBR routine, the --noath mode messed up the VBR routine resulting in very large files
Robert Hegemann: found bugs in some sections when using 32 bit floating point. Default is now back to 64bit floating point.
Takehiro Tominaga: Modified PE formula to use ATH.
S.T.L.: README.DJGPP - instructions for compiling LAME with DJGPP, the dos version of gcc.
LAME 3.84beta June 30 2000
Mark Weinstein: .wav file output (with --decode option) was writing the wrong filesize in the .wav file. Now fixed.
Mark Taylor: (optional) Vorbis support, both encoding and decoding. LAME can now produce .ogg files, or even re-encode your entire .ogg collection into mp3. (Just kidding: it is always a bad idea to convert from one lossy format to another)
?: Bug fixed causing VBR to crash under windows. (pretab array overflow)
Sergey Sapelin: Another bug found in the mpg123 MPEG2 tables. Now fixed for the mpg123 based decoder in LAME.
Marco Remondini: VBR histogram works in win32. compile with -DBRHIST -DNOTERMCAP
Takehiro Tominaga: LAME CBR will now use scalefac_scale to expand the dynamic range of the scalefactors.
Iwasa Kazmi: Library improvements: exit()'s, printf, fprintf's are being replaced by interceptable macros.
LAME 3.83beta May 19 2000
Mark Taylor: Bug in buffering routines: in some cases, could cause MDCT to read past end of buffer. Rare in MPEG2, even more rare for MPEG1, but potentially serious!
Mark Taylor: MDCT/polyphase filterbank was not being "primed" properly. Does not effect output unless you set the encoder delay lower than the default of 576 samples.
Mark Taylor: "vdbj" and "Caster" found several VBR bugs (now fixed): 1. Analog silence detection only checked frequencies up to 16 kHz. 2. VBR mode could still somehow avoid -F mode. 3. VBR mode would ignore noise above 16 kHz (scalefactor band 22), Now calc_noise1 will compute the noise in this band when in VBR mode. Not calculated in CBR mode since CBR algorithm has no way of using this information.
Mark Taylor: scalefactor band 22 info (masking(=ATH), noise and energy) now displayed in frame analyzer.
VBR code ATH tuning was disabled by accident in 3.81, now fixed.
Mark Taylor: lame --decode will produce .wav files. (oops - size is off by a factor of 4)
LAME 3.82beta May 11 2000
Robert Hegemann: Fixed bug in high bitrate joint stereo encodings.
Naoki Shibata: new long block MDCT routine
LAME 3.81beta May 8 2000
all ISO code removed!
Takehiro Tominaga and Naoki Shibata: new window subband routines.
Naoki Shibata: Bug fix in mpglib (decoding) lib: in some cases, MDCT coefficients from previous granule was incorrectly used for the next granule.
ISO 7680 bit buffer limitation removed. It can be reactivated with "--strictly-enforce-ISO" Please report any trouble with high bitrates.
LAME 3.80beta May 6 2000
Takehiro Tominaga: more efficient and faster huffman encoding!
Takehiro Tominaga and Mark Taylor: much improved short block compression!
Tomasz Motylewski and Mark Taylor: MPEG2.5 now supported!
Mark Taylor: incorporated Takehiro's bitstream.c! bitstream.c used by default, but old ISO bitstream code can also be used.
Scott Manley and Mark Taylor: good resampling routine finaly in LAME. uses a 19 point FIR filter with Blackman window. Very slow for non integer resampling ratios.
Iwasa Kazmi: fixed SIGBUS error: VBR and id3 tags were using data after it was free()'d.
Robert Hegemann: Improved VBR tuning. #define RH_QUALITY_CONTROL and #RH_SIDE_VBR now the defaults.
Robert Hegemann: LAME version string now added to ancillary data.
Kimmo Mustonen: VBR histogram support for Amiga.
Casper Gripenberg: VBR stats (but not histogram) for DOS verson.
Robert Hegemann: rare VBR overflow bug fixed.
Zack: -F option strictly enforces the VBR min bitrate. Without -F, LAME will ignore the minimum bitrate when encoding analog silence.
Shawn Riley: User can now specify a compression ratio (--comp <arg>) instead of a bit rate. Default settings based on a compression ratio of 11.0
Mark Taylor: free format bitstreams can be created with --freeformat, and specify any integer bitrate from 8 to 320kbs with -b.
Mark Taylor: lame be used as a decoder (output raw pcm only): lame --decode input.mp3 output.pcm
LAME 3.70 April 6 2000
"LAME 3.69beta becomes LAME 3.70 "stable"
LAME 3.69beta April 6 2000
"spahm": default mode selection bug fixed. In some cases, lame was defaulting to regular stereo instead of jstereo when the user did not specify a mode.
LAME 3.68beta April 4 2000
Mark Taylor: mono encoding bug in DLL fixed.
Ingo Saitz: bug in --cwlimit argument parsing fixed.
Scott Manly: bug in 4-point resample code fixed.
LAME 3.67beta March 27 2000
Robert Hegemann: jstereo now enabled for MPEG2 encodings
Mark Taylor: old M/S stereo mode which used L/R maskings has been removed.
Mark Taylor: Xing MPEG2 VBR headers now working.
Mark Taylor: When quantized coefficients are all 0 in a band, set scalefactors to 0 also to save a few bits.
Ingo Saitz: Problems with framesize calculation when using -f fast-math option fixed.
LAME 3.66beta March 21 2000
Bug fixes in BladeEnc DLL, possible click in last mp3 frame, VBR historgram display, byteswapping option, ASM quantize routines work for both float and double.
LAME 3.65beta March 17 2000
Enabled ASM version of quantize_xrpow() - accidently disabled in lame3.64.
LAME 3.64beta March 16 2000
Don Melton: id3v1.1 tags & id3 bugfixes
Gabriel Bouvigne: L/R matching block type fix
Bug fixed which was allowing quantized values to exceed the maximum when not using -h
Mark Taylor: Fitlers based on polyphase filterbank. should be slightly better since the responce is independent of the blocktype, and they are slightly faster.
Mark Taylor: API: the API changed slightly - and this should be the final version. There is a new routine: lame_encode_buffer() which takes an arbritray sized input buffer, resamples & filters if necessary, encodes, and returns the mp3buffer. There are also several new #defines, so it is possible to compile a simple encoding library with no decoding or file I/O or command line parsing. see the file API for details.
Mark Taylor: MSVC stuff: lame.exe (with and without the frame analyzer) and the CDex lame_enc.dll
should compile under MSVC. The MSVC5 project files may need some tweaking. In particular,
you need to make sure LAMEPARSE, LAMESNDFILE and HAVEMPGLIB
are defined. (and HAVEGTK for the GTK stuff).
LAME 3.63beta February 20 2000
Robert Hegemann: FPE with -h fixed?
Mathey Hendry: FPE error catching for Cygwin, FPE fix for vbr mode and output to /dev/null
Jeremy Hall: Fixed problems with input files where the number of samples is not known.
Mathew Hendry: ASM quantize_xrpow() for GNU i386
Wilfried Behne quantize_xrpow ()for PowerPC and non-ASM
Takehiro Tominaga: GOGO FFTs (not yet used?)
LAME 3.62beta February 9 2000
Iwasa Kazmi: frame analyzer short block display of single subblocks (press 1,2 or 3)
Ingo Saitz: --help option added, with output to stdout
Alfred Weyers: short block AAC spreading function bug fixed
Takehiro Tominaga: new scalefac data structure - improves performance!
Lionel Bonnet: Bug fixed in MPEG2 scalefactor routine: scalefactors were being severly limited.
Takehiro Tominaga: faster FFT routines from. These routines are also compatible with the GOGO routines, in case someone is interested in porting them back to LAME.
Sigbjørn Skjæret, Takehiro Tominaga: faster pow() code.
Joachim Kuebart: Found some unitialized variables that were effecting quality for encodings which did not use the -h option (now fixed).
Mark Taylor: More modularization work. It is now possible to use LAME as a library where you can set the encoding parameters directly and do your own file i/o. The calling program is now it's own mp3 output. For an example of the LAME API, see main.c, or mp3rtp.c or mp3x.c. These can all be compiled as stand alone programs which link with libmp3lame.a.
Felix vos Leitner: mp3rtp fixes. mp3rtp is a standalone program which will encode and stream with RTP.
Robert Hegemann: Information written to stderr displaying exactly which type of lowpass filter (if any) is being used.
Iwasa Kazmi: mpglib (the mpg123 decoder) scsfi decoding fixes.
Takehiro Tominaga: More mpglib scsfi decoding fixes.
LAME 3.61beta January 14 2000
Mark Taylor: Fixed bug with lowpass filters when using VBR with a 64kbs or lower min bitrate setting.
Takehiro Tominaga: more efficient huffman encoding splitting.
LAME 3.60beta January 9 2000
Mark Taylor: Distribution now comes with self test. Needs work to be automated, see 'make test' in Makefile.
Mark Taylor: AAC spreading function now the default
Gabriel Bouvigne: updated HTML docs
Felix von Leitner: compute correct file length from Xing header (if present) when input file is a mp3 file
Felix von Leitner: mp3rtp (standalone) program now included. Not yet tested. mp3rtp ip:port:ttl <infile> /dev/null will stream directly to ip:port using RTP.
LAME 3.59beta January 4 2000
Takehiro Tominaga: --noath option. Disables ATH maskings.
Gabriel Bouvigne: updated HTML docs.
Iwasa Kazmi: makefile fixes
Mark Taylor: Fixed bug where first frame of data was always overwritten with 0's. Thanks to 'gol'
Mark Taylor: bug fixes in mid/side masking ratios (thanks to Menno Bakker)
Mark Taylor: replaced norm_l, norm_s table data with formulas.
LAME 3.58beta December 13 1999
Segher Boessenkool: More accurate quantization procedure! Enabled with -h.
Mathew Hendry, Acy Stapp and Takehiro Tominaga: ASM optimizations for quantize_xrpow and quantize_xrpow_ISO.
Chuck Zenkus: "encoder inside" logo on web page
Mark Taylor: a couple people have asked for this. Allow LAME to overide VBR_min_bitrate if analog_silence detected. Analog_silence defined a la Robert: energy < ATH.
An Van Lam: Valid bitrates were being printed for layer 2, not layer 3!
Ethan Yeo: Makefile.MSVC updated
Mark Stephens: updated all MSVC project files
Robert Hegemann: lowpass and highpass filters can be enabled with --lowpass, --highpass
Mark Taylor: MS switching is now smoother: ms_ratio average over 4 granules
Takehiro Tominaga: Scalefactor pre-emphasis fixed (and now turned back on)
Takehiro Tominaga: Bug in M/S maskings: switch to turn on stereo demasking code was buggy.
LAME 3.57beta November 22 1999
Sigbjørn Skjæret, patch to allow encoding from 8bit input files when using LIBSNDFILE
Mark Taylor: Automatic downsampling to nearest valid samplerate.
Mark Taylor: Scalefactor bands demarked on MDCT plot in frameanalyzer
Mark Taylor: Scalefactor preemphasis disabled for now. The algorithm was often doing more harm than good.
LAME 3.56beta November 19 1999
Kimmo Mustonen: portabilty code cleanup.
Vladimir Marek: id3 genre patch.
Conrad Sanderson: new applypatch script.
Mark Taylor: Initial window type now "STOP_TYPE" to reduce initial attenuation. This is needed because the new encoder delay is so short. With a NORM_TYPE, the first 240 samples would be attenuated.
Mark Taylor: Padding at end of file now adjusted (hopefully!) to produce as little padding as possible while still guarantee all input samples are encoded.
Takehiro Tominaga: Reduced shortblock extra bit allocation formulas by 10% since new huffman coding is at least 10% more efficient.
LAME 3.55beta November 11 1999
Albert Faber: updated BladeEnc.dll
Mark Taylor: Simple lowpass filter added to linear downsampling routine.
Nils Faerber: updated man page.
Mark Taylor: All floating point variables are delcared FLOAT or FLOAT8. Change the definition of FLOAT8 in machine.h to run at 32bit preceision.
Mark Taylor: Bug (introduced in 3.54beta) in stereo->mono downsampling fixed.
LAME 3.54beta November 8 1999
Mark Taylor: Encoder delay is now 48 samples. Can be adjusted to 1160 to sync with FhG (see ENCDELAY in encoder.h) This is kind of amazing, since if Takehiro put his MDCT/filterbank routine in a decoder, we could have a total delay of only 96 samples.
Mark Taylor: More inconstancies found and fixed in MPEG2 tables.
Mark Taylor: Resampling from an MP3 input file now works. But we still dont have a lowpass filter so dont expect good results.
LAME 3.53beta November 8 1999
Takehiro Tominaga: Fixed MPEG2 problem in new MDCT routines. Takehiro's combined filterbank/MDCT routine is now the default. Removes all buffering from psymodel.c and the filterbanks/MDCT routines.
LAME 3.52beta November 8 1999
By permission of copyright holders of all GPL code in LAME, all GPL code is now released under a modified version of the LGPL (see the README file)
By popular demand, all C++ comments changed to C style comments
Mark Taylor: Linear resampling now works. Use --resample to set an output samplerate different from the input samplerate. (doesn't seem to work with mp3 input files, and there is no lowpass filter, so dont expect good results just yet)
Takehiro Tominaga: Faster Huffman encoding routines
The following changes are disabled because of MPEG2 problems. But to try them, set MDCTDELAY=48 in encoder.h, instead of MDCTDELAY=528.:
Takehiro Tominaga: New MDCT routines with shorter delay (48 samples instead of 528) and even faster than the old routines.
Takehiro Tominaga: Removed extra buffering in psymodel.c
LAME 3.51 November 7 1999
Takehiro Tominaga: Bug in quantize.c absolute threshold of hearing calculation for non-44.1 kHz input files.
LAME 3.50 November 1 1999
LAME 3.37beta becomes official LAME 3.50 release
LAME 3.37beta November 1 1999
Lionel Bonnet: Found severe bug in MPEG2 Short block SNR.
Sergey Sapelin: VBR Toc improvement.
Sergey Dubov: fskip() routine
Conrad Sanderson: replacement for filterbank.c. Not much faster but amazingly simpler.
LAME 3.36beta October 25 1999
Albert Faber: more MSVC and BladeDLL updates
Kimmo Mustonen: Much code cleanup and Amiga updates
Anton Oleynikov: Borland C updates
Mark Taylor: More stdin fixes: For some reason, forward fseek()'s would fail when used on pipes even though it is okay with redirection from "<". So I changed all the forward fseek()'s to use fread(). This should improve stdin support for wav/aiff files. If you know the input file is raw pcm, you can still use the '-r' option to avoid *all* seeking of any kind.
LAME 3.35beta October 21 1999
Leonid Kulakov: Serious bug in MPEG2 scalefactor band tables fixed.
Portability patches from: Anton Oleynikov, Sigbjørn Skjæret, Mathew Hendry, Richard Gorton
Alfred Weyers: compiler options, updated timestatus.
Albert Faber: BladeDll and other updates (new machine.h).
Monty: updated Makefile to fix gcc inline math bug.
LAME 3.34beta October 12 1999
Mark Taylor: Bug fixed: minimum bitrate in VBR mode could be ignored for a few frames.
Mark Taylor: New (minor) VBR tunings.
Tim Ruddick: New wav/aiff header parsing routines. Better parsing and fewer fseek()'s.
Anton Oleynikov: patches to work with Borland C
Gabriel Bouvigne: Experimental voice option enabled with --voice
LAME 3.33beta October 11 1999
Robert Hegemann: RH VBR mode now the default and only VBR mode. The new code will always quantize to 0 distortion and the quality is increased by reducing the masking from the psy-model. -X0 is still the default for now.
Robert Hegemann: new -X5 mode
Mathew Hendry: New timing code, removes the need for HAVETIMES
Mathew Hendry: assembler quantize_xrpow for Windows
Iwasa Kazmi: stdin/stdout patch for Windows
Mark Taylor: New option: "--athonly" will ignore the psy-model output and use only the absolute threshold of hearing for the masking.
LAME 3.32beta October 8 1999
Takehiro Tominaga: faster long block spreading function convolution for non 44.1 kHz sampling frequencies, and faster short block spreading function convolution for all sampling frequencies.
Takehiro Tominaga: Completly rewritten huffman table selection and count_bits(). More efficient table selection results in many more bits per frame.
Takehiro Tominaga: More efficient scalefac compress setting.
Mike Cheng: new calc_noise2()
Alfred Weyers: patch for timestatus() seconds rollover
LAME 3.31beta September 28 1999
Albert Faber: updated his BladeDLL code. This allows LAME to be compiled into a BladeEnc compatiable .dll.
Mike Cheng: faster l3psycho_ener() routine.
Sigbjørn Skjæret: more code cleanup.
LAME 3.30beta September 27 1999
Conrad Sanderson: ID3 tag code added (type 'lame' for instructions)
new mdct.c from Mike Cheng (no faster, but much cleaner code)
Mathew Hendry: Microsoft nmake makefile and a couple other changes for MSVC
More modulization work: One input sound file interface handles mp3's, uncompressed audio, with or without LIBSNDFILE. Fixes (hopefully) a bunch of file I/O bugs introduced in 3.29 (Mark Taylor)
LAME will now print valid samplerate/bitrate combinations (Mark Taylor)
stdin/stdout fix for OS/2 (Paul Hartman)
For mp3 input files, totalframes estimated based on filesize and first frame bitrate. (Mark Taylor)
Updated all functions with new style prototypes. (Sigbjørn Skjæret)
LAME 3.29beta September 21 1999
Bug in bigv_bitcount fixed. Loop.c was overestimating the number of bits needed, resulting in wasted bits every frame. (Leonid A. Kulakov)
Bug in *_choose_table() fixed These routines would not sellect the optimal Huffman table in some cases. (Leonid A. Kulakov)
Tuning of ATH normalization (macik)
Removed unused variables and fixed function prototypes (Sigbjørn Skjæret)
Sami Farin sent a .wav file that LAME built in support choked on. I added a slightly more sophisticated wav header parsing to handle this, but if you have trouble, use libsndfile.
Resampling hooks and options added. Buffering and resampling routines need to be written.
LAME will now take an mp3 file as input. When resampling code is working, LAME will be able to (for example) convert a high bitrate stereo mp3 to a low bitrate mono mp3 for streaming.
LAME 3.28beta September 15 1999
Serious bug fixed in high frequency MDCT coefficients. Huffman coding was reversing the order of the count1 block quadruples. (Leonid A. Kulakov)
nint() problems under Tru64 unix fixed and preprocessor variable HAVE_NINT removed. (Bob Bell)
Compiler warning fixes and code cleanup (Sigbjørn Skjæret, Lionel Bonnet)
USAGE file now includes suggestions for downsampling. For low bitrate encodings, proper downsampling can give dramatically better results. (John Hayward-Warburton)
LAME 3.27beta September 12 1999
Several bugs in encode.c and l3bitstream.c fixed by Lionel Bonnet.
Bugs in new VBR (#define RH) formula for mono input file and mid/side encoding fixed.
LAME 3.26beta September 10 1999
The "-m m" option (mono .mp3 file) will automatically mix left and right channels if the input file is stereo. (Alfred Weyers)
New quant_compare algorithm (method for deciding which of two quantizations is better) enabled with -X4 (Greg Maxwell)
New mid/side VBR bit allocation formula. Mid channel bits are set by the quality requirements, and then the side channel uses a reduced number of bits (in a proportion coming from the fixed bitrate code). This might not be optimal, but it should be pretty good and no one knows what the optimal solution should be. (Greg Maxwell)
New VBR (#define RH) tunings based on detailed listening tests by Macik and Greg Maxwell.
Sigbjørn Skjæret fixed several compiler warnings (which turned out to be potential bugs)
Takehiro Tominaga fixed a low bitrate bug in reduce_side()
Alfred Weyers fixed some buffer overflows.
New ATH (absolute threshold of hearing) formula replaces buggy ISO code, and adds analog silence treatment (removal of coefficients below below ATH). These are turned on by default but have not been fully tested. (Robert Hegemann)
Bug in short block spreading function fixed. (Robert Hegemann)
LAME 3.25beta August 22 1999
Sigbjørn Skjæret fixed a zero byte malloc call. This bug was introduced in 3.24 and causes problems on non Linux systems.
Bit allocation routines would sometimes allocate more than 4095 bits to one channel of one granule. A couple of people reported problems that might be caused by this, especially at higher bitrates.
Nils Faerber updated the man page and fixed many of the compiler warnings.
LAME 3.24beta August 15 1999
This release contains the following new code (for developers) which is disabled by default:
Robert Hegemann: Completely overhauled VBR code. Now computes exact number of bits required for the given qualty and then quantized with the appropriate bitrate.
Several new quantization quality measures.
LAME 3.23beta August 8 1999
Very nice continuously updated VBR histogram display from Iwasa Kazmi. (disabled with --nohist).
More modulerization work. The encoding engine can now be compiled into libmp3lame, but the interface is awkward.
Bug fixed in FFT Hann window formula (Leonid A. Kulakov).
New LAME logo on the download page. Created by Chris Michalisles.
Several VBR algorithm improvements from Robert Hegemann. New quantization noise metrics and VBR quality measure takes into account mid/side encoding. Should produce smaller files with the same quality, especially when using jstereo.
LAME 3.22beta July 27 1999
Downsampling (stereo to mono) bug with MPEG2 fixed. (Mike Oliphant)
Downsampling now merges L & R channels - before it only took the L channel.
More modularization and code cleanup from Albert Faber and myself.
Input filesize limit removed for raw pcm input files. For other file types, LAME will still only read the first 2^32 samples, (27 hours of playing time at 44.1 kHz).
LAME 3.21beta July 26 1999
Correct Mid/Side masking thresholds for JSTEREO mode! This is enabled with -h. It makes LAME about 20% slower since it computes psycho-acoustics for L,R Mid and Side channels.
"Analog silence" threshold added. Keeps VBR from upping the bitrate during very quite passages. (Robert.Hegemann)
New VBR quality setting from Robert Hegemann. It is based on the idea that distortion at lower bit rates sounds worse than at higher bitrates, and so the allowed distortion (VBR quality setting) is proportional to the bitrate. Because of this, default minimum bitrate is now 32kbs.
Expermental subblock gain code enabled with -Z.
New "-r" option for raw pcm input files. With -r, LAME will not do any fseek()'s or look for wav and aiff headers on the input file.
Bug fixes in mp3x (frame analyzer) for viewing frames near end of the file.
Bug fixed to allow setting the sampling rate of raw pcm input files.
LAME 3.20beta July 19 1999
Bug in get_audio.c fixed. Libsndfile wrappers would not compile (Miguel Revilla Rodriguez)
Nils Faerber found some unitialized variables and some wierd extranous computations in filter_subband, now fixed. This was causing seg faults on some machines.
LAME 3.19beta July 18 1999
Oops! Robert Hegemann immediatly found a bug in the new (old -Z option) quantization code. calc_noise1 was not returning tot_noise, so non ms-stereo frames were buggy.
LAME 3.18beta July 17 1999
Many psycho-acoustic bug fixes. Dan Nelson discovered a bug in MPEG2: For short blocks, the code assumes 42 partition bands. MPEG1 sometimes has less, MPEG2 can have more. In MPEG1, this bug would not have effected the output if your compiler initializes static variables to 0 on creation. In MPEG2 it leads to array out-of-bounds access errors. Finally, there was a related bug in MPEG1/MPEG2, short & long blocks where the energy above 16 kHz was all added to partition band 0. (the lowest frequeny partition band!)
The -Z option (Gabriel Bouvigne's idea of using total quantization noise to choose between two quantizations with the same value of "over") is now the default. I believe this helps remove the trilling sound in Jan's testsignal4.wav. The quality of testsignal2.wav and testsignal4.wav are now better than Xing and getting closer to FhG.
Bug fixes in frame & sample count for downsampling mode. (ben "jacobs")
Patches to improve modulization. (ben "jacobs")
LAME 3.17beta July 11 1999
substantial code cleanup towards goal of making LAME more modular.
LAME 3.16beta July 11 1999
New tunings of window switching, and better bit allocation based on pe. (Jan Rafaj. improves both testsignal2.wav and testsignal4.wav).
Bug in mid/side quantization when side channel was zero fixed. (Albert Faber)
Removed some extranous computations in l3psy.c (Robert Hegemann)
More detailed timing status info, including hours display. (Sakari Ailus) and percentage indicator (Conrad Sanderson).
Window_subband and calc_noise1,calc_noise2 speedups. Quantize_xrpow speedup should be significant on non GNU/intel systems. (Mike Cheng)
Better initial guess for VBR bitrate. Should speed up VBR encoding. (Gabriel Bouvigne)
More advanced .wav header parsing. fixes bugs involving click in first frame. (Robert.Hegemann)
Correct filesize and total frame computation when using LIBSNDFILE (ben "jacobs")
Click in last frame (buffering problem) when using libsndfile fixed.
Audio I/O code overhauled. There is now a uniform audio i/o interface to libsndfile or the LAME built in wav/aiff routines. All audio i/o code localized to get_audio.c.
times()/clock() problem fixed for non-unix OS. (Ben "Jacobs")
Fixed uninitialized pe when using fast mode. (Ben "Jacobs")
LAME 3.13 June 24 1999
Patches for BeOS from Gertjan van Ratingen.
Makefile info for OS/2 Warp 4.0 (from dink.org).
Status display now based on wall clock time, not cpu time.
mem_alloc no longer allocates twice as much memory as needed (Jan Peman).
Updated BLADEDLL code to handle recent changes (Albert Faber).
Bug fixed in parsing options when not using GTK (Albert Faber).
MPEG2 Layer III psycho acoustics now working.
Improved huffman encoding Chris Matrakidis. (10% faster). I dont know how he finds these improvements! LAME with full quality now encodes faster than real time on my PII 266.
Fixed time display when encoding takes more than 60 minutes.
New mid/side stereo criterion. LAME will use mid/side stereo only when the difference between L & R masking thresholds (averaged over all scalefactors) is less then 5db. In several test samples it does a very good job mimicking the FhG encoder.
Bug in mid/side stereo fixed: independent variation of mid & side channel scalefactors disabled. Because of the way outer_loop is currently coded, when encoding mid/side coefficietns using left/right thresholds, you have to vary the scalefactors simultaneously.
Bug in side/mid energy ratio calculation fixed. (Thanks to Robert Hegemann)
Default mode is stereo (not jstereo) if bitrate is chosen as 192kbs or higher. Tero Auvinen first pointed out that FhG seems to think at 160kbs, their encoder is so good it doesn't need jstereo tricks. Since LAME is not as good as FhG, I am going to claim that 192kbs LAME is so good it doens't need jstereo tricks, and thus it is disabled by default.
WAV header parsing for big-endian machines, and automatic detection of big-endian machines. (Thanks to Sigbjørn Skjæret).
added 56 sample delay to sync LAME with FhG.
MP3x (frame analyzer) can now handle MPEG2 streams.
MPEG2 layer III now working! lower bit rates (down to 8kbs) and 3 more sampling frequencies: 16000, 22050, 24000Hz. Quality is poor - the psy-model does not yet work with these sampling frequencies.
Fixed "ERROR: outer_loop(): huff_bits < 0." bug when using VBR.
bash and sh scripts to run LAME on multiple files now included. (from Robert Hegemann and Gerhard Wesp respectively)
bug fix in encoding times for longer files from (Alvaro Martinez Echevarria)
yet another segfault in the frame analyzer fixed.
ISO psy-model/bit allocation routines removed. This allowed makeframe() to be made much simpler, and most of the complicated buffering is now gone. Eventually I would like the encoding engine to be a stand alone library.
Better VBR tuning. Find minimum bitrate with distortion less than the allows maximum. A minimum bit rate is imposed on frames with short blocks (where the measured distortion can not be trusted). A minimum frame bitrate can be specified with -b, default=64kbs.
LIBSNDFILE support. With libsndfile, LAME can encode almost all sound formats. Albert Faber did the work for this, including getting libsndfile running under win32.
CRC checksum now working! (Thanks to Johannes Overmann )
frame analyzer will now work with mono .mp3 files
more code tweeks from Jan Peman.
Compaq-Alpha(Linux) fixes and speedups from Nils Faerber.
Faster bin_search_StepSize from Juha Laukala.
Faster quantize() from Mike Cheng
Faster quantize_xrpow() from Chris Matrakidis. xrpow_flag removed since this option is now on by default.
Fixed .wav header parsing from Nils Faerber.
Xing VBR frame info header code from Albert Faber. "Xing" and "LAME 3.12" embedded in first frame.
Bug in VBR bit allocation based on "over" value fixed.
LAME 3.11 June 3 1999
Almost all warnings (-Wall) now fixed! (Thanks to Jan Peman)
More coding improvements from Gabriel Bouvigne and Warren Toomey.
VBR (variable bit rate). Increases bit rate for short blocks and for frames where the number of bands containing audible distortion is greater than a given value. Much tuning needs to be done.
Patch to remove all atan() calls from James Droppo.
LAME 3.10 May 30 1999
Fast mode (-f) disables psycho-acoustic model for real time encoding on older machines. Thanks to Lauri Ahonen who first sent a patch for this.
New bit reservoir usage scheme to accommodate the new pre-echo detection formulas.
Tuning of AWS and ENER_AWS pre-echo formulas by Gabriel Bouvigne and myself. They work great! now on by default.
In jstereo, force blocktypes for left & right channels to be identical. FhG seems to do this. It can be disabled with "-d".
Patches to compile MP3x under win32 (Thanks to Albert Faber).
bin_serach_stepsize limited to a quantizationStepSize of -210 through 45.
outer_loop() will now vary Mid & Side scalefactors independently. Can lead to better quantizations, but it is slower (twice as many quantizations to look at). Running with "-m f" does not need this and will run at the old speed
Bug in inner_loop would allow quantizations larger than allowed. (introduced in lame3.04, now fixed.)
Updated HTML documentation from Gabriel Bouvigne.
Unix man page from William Schelter.
numlines bug fixed. (Thanks to Rafael Luebbert, MPecker author).
Quantization speed improvements from Chirs Matrakidis.
When comparing quantizations with the same number of bands with audible distortion, use the one with the largest scalefactors, not the first one outer_loop happened to find.
Improved defination of best quantization when using -f (fast mode).
subblock code now working. But no algorithm to choose subblock gains yet.
Linux now segfaults on floating point exceptions. Should prevent me from releasing binaries that crash on other operating systems.
LAME 3.04 May 22 1999
Preliminary documentation from Gabriel Bouvigne.
I wouldn't have thought it was possible, but now there are even more speed improvements from Chris Matrakidis! Removed one FFT when using joint stereo, and many improvements in loop.c.
"Fake" ms_stereo mode renamed "Force" ms_stereo since it forces mid/side stereo on all frames. For some music this is said to be a problem, but for most music mode is probably better than the default jstereo because it uses specialized mid/side channel masking thresholds.
Small bugs in Force ms_stereo mode fixed.
Compaq Alpha fixes from Nathan Slingerland.
Some new experimental pre-echo detection formulas in l3psy.c (#ifdef AWS and #ifdef ENER_AWS, both off by default. Thanks to Gabriel Bouvigne and Andre Osterhues)
Several bugs in the syncing of data displayed by mp3x (the frame analyzer) were fixed.
highq (-h) option added. This turns on things (just one so far) that should sound better but slow down LAME.
LAME 3.03 May 18 1999
Faster (20%) & cleaner FFT (Thanks to Chris Matrakidis http://www.geocities.com/ResearchTriangle/8869/fft_summary.html)
mods so it works with VC++ (Thanks to Gabriel Bouvigne, www.mp3tech.org)
MP3s marked "original" by default (Thanks to Gabriel Bouvigne, www.mp3tech.org)
Can now be compiled into a BladeEnc compatible .DLL (Thanks to Albert Faber, CDex author)
Patches for "silent mode" and stdin/stdout (Thanks to Lars Magne Ingebrigtsen)
Fixed rare bug: if a long_block is sandwiched between two short_blocks, it must be changed to a short_block, but the short_block ratios have not been computed in l3psy.c. Now always compute short_block ratios just in case.
Fixed bug with initial quantize step size when many coefficients are zero. (Thanks to Martin Weghofer).
Bug fixed in MP3x display of audible distortion.
improved status display (Thanks to Lauri Ahonen).
LAME 3.02 May 12 1999
encoder could use ms_stereo even if channel 0 and 1 block types were different. (Thanks to Jan Rafaj)
added -k option to disable the 16 kHz cutoff at 128kbs. This cutoff is never used at higher bitrates. (Thanks to Jan Rafaj)
modified pe bit allocation formula to make sense at bit rates other than 128kbs.
fixed l3_xmin initialization problem which showed up under FreeBSD. (Thanks to Warren Toomey)
LAME 3.01 May 11 1999
max_name_size increased to 300 (Thanks to Mike Oliphant)
patch to allow seeks on input file (Thanks to Scott Manley)
fixes for mono modes (Thanks to everyone who pointed this out)
overflow in calc_noise2 fixed
bit reservoir overflow when encoding lots of frames with all zeros (Thanks to Jani Frilander)
LAME 3.0 May 10 1999
added GPSYCHO (developed by Mark Taylor)
added MP3x (developed by Mark Taylor)
LAME now maintained by Mark Taylor
November 8 1998
Version 2.1f released
50% faster filter_subband() routine in encode.c contributed by James Droppo
November 2 1998
Version 2.1e released.
New command line switch -a auto-resamples a stereo input file to mono.
New command line switch -r resamples from 44.1 kHz to 32 kHz [this switch doesn't work really well. Very tinny sounding output files. Has to do with the way I do the resampling probably]
Both of these were put into the ISO code in the encode.c file, and are simply different ways of filling the input buffers from a file.
October 31 1998
Version 2.1d released
Fixed memory alloc in musicin.c (for l3_sb_sample)
Added new command line switch (-x) to force swapping of byte order
Cleaned up memory routines in l3psy.c. All the mem_alloc() and free() routines where changed so that it was only done once and not every single time the routine was called.
Added a compile time switch -DTIMER that includes all timing info. It's a switch for the time being until some other people have tested on their system. Timing code has a tendency to do different things on different platforms.
October 18 1998
Version 2.1b released.
Fixed up bug: all PCM files were being read as WAV.
Played with the mem_alloc routine to fix crash under amigaos (just allocating twice as much memory as needed). Might see if we can totally do without this routine. Individual malloc()s where they are needed instead
Put Jan Peman's quality switch back in. This reduces quality via the '-q ' switch. Fun speedup which is mostly harmless if you're not concerned with quality.
Compiling with amiga-gcc works fine
October 16 1998
Version 2.1a released. User input/output has been cleaned up a bit. WAV file reading is there in a very rudimentary sense ie the program will recognize the header and skip it, but not read it. The WAV file is assumed to be 16bit stereo 44.1 kHz.
October 6 1998
Version 2.1 released with all tables now incorporated into the exe. Thanks to Lars Magne Ingebrigtseni(firstname.lastname@example.org)
October 4 1998In response to some concerns about the quality of the encoder, I have rebuilt the encoder from scratch and carefully compared output at all stages with the output of the unmodified ISO encoder. Version2.0 of LAME is built from the ISO source code (dist10), and incorporates modifications from myself and the 8hz effort. The output file from LAME v2.0 is identical to the output of the ISO encoder for my test file.Since I do not have heaps of time, I left the ISO AIFF file reader in the code, and did not incorporate a WAV file reader.Added section on quality October 1 1998
Updated web page and released LAME v1.0
Up to September 1998
Working on the 8hz source code...
Patched the 8hz source code
45% faster than original source (on my freebsd p166).
m1 - sped up the mdct.c and quantize() functions [MDCTD, MDCTD2, LOOPD]
m2 - sped up the filter_subband routine using Stephane Tavenard 's work from musicin [FILTST]
m2 - minor cleanup of window_subband [WINDST2]
m2 - Cleaned up a few bits in l3psy.c. Replaced a sparse matrix multiply with a hand configured unrolling [PSYD]
m3 - (amiga only) Added in the asm FFT for m68k (based on sources from Henryk Richter and Stephane Tavenard)
m4 - raw pcm support back in
m5 - put in a byte-ordering switch for raw PCM reading (just in case)
m6 - reworked the whole fft.c file. fft now 10-15% faster.
m7 - totally new fft routine. exploits fact that this is a real->complex fft. About twice as fast as previous fastest fft (in m6). (C fft routine is faster than the asm one on an m68k!)
- Now encodes from stdin. Use '-' as the input filename. Thanks to Brad Threatt
- Worked out that the 1024point FFT only ever uses the first 6 phi values, and the first 465 energy values. Saves a bunch of calculations.
- Added a speed-up/quality switch. Speed is increased but quality is decreased slightly. My ears are bad enough not to be able to notice the difference in quality at low settings :). Setting '-q 1' improves speed by about 10%. '-q 100' improves speed by about 26%. Enoding of my test track goes from 111s (at default '-q 0') to 82s (at -q 100). Thanks to Jan Peman for this tip.
m9 - fixed an error in l3psy.c. numlines is overwritten with incorrect data. Added a new variable numlines_s to fix this. Thanks again to Jan Peman.
m10 - Down to 106 seconds by selecting a few more compiler options. Also added a pow20() function in l3loop.c to speed up (ever so slightly) calls to pow(2.0, x)
No speedups. Just cleaned up some bits of the code.
Changed K&R prototyping to 'normal' format. Thanks to Steffan Haeuser for his help here.
Changed some C++ style comments to normal C comments in huffman.c
Removed the #warning from psy_data.h (it was getting annoying!)
Removed reference in bitstream.c to malloc.h. Is there a system left where malloc.h hasn't been superceded by stdlib.h?
my PSYD hack for the spreading functions is only valid for 44.1 kHz - Should really put in a "if freq = 44.1 kHz" switch for it. Someone might want to extend the speedup for 48 and 32 kHz.
Putting in Jan Peman's quantanf_init speedup