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Tool
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LAME is a MP3 encoder and the Lame ACM MP3 is an ACM codec that you can use in most applications for example in Virtualdub(to install the ACM codec just extract all files and right click on the LameACM.inf and select Install). LameDropXPd is a practical frontend for LAME that makes things easier to the user, as there is no need to know about command line usage: most LAME settings are reachable on a graphical interface.
Free software
OS:
File size: 951KB
Other versions
Old versions
Version history
Alternative software
OS:
File size: 951KB
Other versions
Old versions
Version history
Alternative software
Screenshots
Latest version
Download
Download LAME MP3 4.0 64-bit 760KB Win64
Download LAME MP3 4.0 951KB Win
Download old versions
Software License
Supported operating systems
More information and other downloads
Download more Windows LAME MP3 versions from www.lamemp3.co.uk
Download more Windows LAME MP3 versions from www.rarewares.org
Download LAME ACM 3.99.5
Download LameDropXPd here, a very simple GUI/Frontend for LAME
Download LameXP here, a GUI for LAME
Download winLame here, another GUI for LAME
Download LameFE here, yet another gui for LAME(no longer updated)
Download more Windows LAME MP3 versions from www.rarewares.org
Download LAME ACM 3.99.5
Download LameDropXPd here, a very simple GUI/Frontend for LAME
Download LameXP here, a GUI for LAME
Download winLame here, another GUI for LAME
Download LameFE here, yet another gui for LAME(no longer updated)
Version history / Release notes / Changelog / What's New
LAME 4.0 July 11 2026
Security scores assume LAME runs under a non-privileged account. For frontend-only entries, scores also assume the command line is sanitized or restricted before reaching LAME; integrators who pass unsanitized or fully scripted command-line input directly may see higher practical severity than stated.
Security
Fixed a stack buffer overflow in the Blade-style encoder DLL (lame_enc.dll): beInitStream() copied a caller-supplied configuration structure using an unchecked, caller-controlled size, so an oversized or compiler-mismatched size could overwrite the stack. The size is now bounds-checked and the packed structure layout is consistent across MSVC and GCC/MinGW builds. [CVSS 8.4, Blade DLL]. Fix by Alexander Leidinger.
Fixed an integer underflow in the AIFF header parser (parse_aiff_header()): a crafted file with a FORM chunk size below 4 wrapped the unsigned chunk-size counter to a huge value, sending the chunk-scanning loop into an effectively unbounded spin (a hang) on a tiny malicious input. The size is now validated before it is decremented. [CVSS 5.5, AIFF frontend]. Fix by Alexander Leidinger.
Alexander Leidinger
Bump the major version to 4.0 (minor reset to 0). The LAME tag embedded in every encoded MP3 has a fixed 9-byte field for the encoder version string; since 3.100 the 3-digit minor version left no room for the trailing alpha/beta/release marker character, which was silently dropped.
Fix building with recent GCC and Clang, which rejected the UTF-8 ID3 tag functions as an incompatible pointer type. Also fixes the corrupted genre written by --id3v2-utf8 --tg. Patch submitted by Rudi Heitbaum, patch ticket [ #102 ]; thanks to lazka for reporting, bug ticket [ #523 ].
Export the UTF-8 ID3 tag functions id3tag_set_textinfo_utf8 and id3tag_set_comment_utf8 from the shared library, and fix a possible crash on out-of-memory in the ID3v2 user-defined tag setters, bug ticket [ #518 ].
LAME 3.101 July 09 2026
Robert Hegemann
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)
Alexander Leidinger
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.
Use external libmpg123 instead of internal mpglib for mpeg decoding (unix-like systems which use the autotools ("configure; make; make install") build system). There are years of improvements in libmpg123 which we do not have in mpglib. Patch by Thomas Orgis of the mpg123 project.
Update the Visual Studio project files to Visual Studio 2019. Patch by Michel Fink.
Remove the macosx XCode project files, nobody stepped up to update them for the libmpg123 changes.
Add ID3v2.4 support (UTF-8 ID3 tags). Patch by "kris".
Add pkg-config support. Patch by Nicolas Boulenguez(Debian).
Add IPv6 support for mp3rtp. This includes an incompatible change to the command line arguments for existing use cases / scripts. Patch by Surabhi.
Windows downloads from https://www.lamemp3.co.uk/#downloads
Security scores assume LAME runs under a non-privileged account. For frontend-only entries, scores also assume the command line is sanitized or restricted before reaching LAME; integrators who pass unsanitized or fully scripted command-line input directly may see higher practical severity than stated.
Security
Fixed a stack buffer overflow in the Blade-style encoder DLL (lame_enc.dll): beInitStream() copied a caller-supplied configuration structure using an unchecked, caller-controlled size, so an oversized or compiler-mismatched size could overwrite the stack. The size is now bounds-checked and the packed structure layout is consistent across MSVC and GCC/MinGW builds. [CVSS 8.4, Blade DLL]. Fix by Alexander Leidinger.
Fixed an integer underflow in the AIFF header parser (parse_aiff_header()): a crafted file with a FORM chunk size below 4 wrapped the unsigned chunk-size counter to a huge value, sending the chunk-scanning loop into an effectively unbounded spin (a hang) on a tiny malicious input. The size is now validated before it is decremented. [CVSS 5.5, AIFF frontend]. Fix by Alexander Leidinger.
Alexander Leidinger
Bump the major version to 4.0 (minor reset to 0). The LAME tag embedded in every encoded MP3 has a fixed 9-byte field for the encoder version string; since 3.100 the 3-digit minor version left no room for the trailing alpha/beta/release marker character, which was silently dropped.
Fix building with recent GCC and Clang, which rejected the UTF-8 ID3 tag functions as an incompatible pointer type. Also fixes the corrupted genre written by --id3v2-utf8 --tg. Patch submitted by Rudi Heitbaum, patch ticket [ #102 ]; thanks to lazka for reporting, bug ticket [ #523 ].
Export the UTF-8 ID3 tag functions id3tag_set_textinfo_utf8 and id3tag_set_comment_utf8 from the shared library, and fix a possible crash on out-of-memory in the ID3v2 user-defined tag setters, bug ticket [ #518 ].
LAME 3.101 July 09 2026
Robert Hegemann
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)
Alexander Leidinger
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.
Use external libmpg123 instead of internal mpglib for mpeg decoding (unix-like systems which use the autotools ("configure; make; make install") build system). There are years of improvements in libmpg123 which we do not have in mpglib. Patch by Thomas Orgis of the mpg123 project.
Update the Visual Studio project files to Visual Studio 2019. Patch by Michel Fink.
Remove the macosx XCode project files, nobody stepped up to update them for the libmpg123 changes.
Add ID3v2.4 support (UTF-8 ID3 tags). Patch by "kris".
Add pkg-config support. Patch by Nicolas Boulenguez(Debian).
Add IPv6 support for mp3rtp. This includes an incompatible change to the command line arguments for existing use cases / scripts. Patch by Surabhi.
Windows downloads from https://www.lamemp3.co.uk/#downloads
View full changelog
Sections/Browse similar tools
Alternative to LAME MP3
(Latest version updated)foobar2000 (Aug 5, 2026)
LameXP (Feb 28, 2026)
Pazera Lame Front-End (Mar 15, 2013)
winLAME (Dec 15, 2025)
Guides and How to's
Acronyms / Also Known As
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| 38 reviews, Showing 1 to 5 reviews |
Rating by shurikello on
Apr 6, 2026 Version: 3.101.b3-q4patched
OS: Windows 10 64-bit Ease of use: 10/10
Functionality: 10/10
Value for money: 10/10
Overall: 10/10
I really do love how well It holds up at V3(~175kbps), Still useful and relevant despite AAC/Opus being a thing.
Review by on
Dec 22, 2024 Version: Lame MP3 3.100.1
OS: Windows 11 64-bit Ease of use: 10/10
Functionality: 10/10
Value for money: 10/10
Overall: 10/10
It's the SoX resampling 'best' option which is causing LamedropXPd GUI to not initiate. Just use medium setting- it's fine!
Review by David on
Jun 25, 2021 Version: 3.100
OS: Windows 10 64-bit Ease of use: 8/10
Functionality: 8/10
Value for money: 10/10
Overall: 10/10
Would Baldrick please pass on to lamedropXPd creator John Edwards at Rarewares this info regarding resampling bug please. The bug is only using the 'best option' as the other two options 'fast' and 'medium' work fine as intended. The older Lamedropbox from 2017 has the same bug. I tested 32 bit dropbox bitin WinXP and Win7 32 bit systems. Thankyou.
Review by Rod on
Jun 25, 2021 Version: 3.100.1
OS: WinXP Ease of use: 8/10
Functionality: 9/10
Value for money: 10/10
Overall: 10/10
I reverted back to older 3.100 LameDropXpd which has working resampling option as newer 2021 version has removed this useful option due to a bug introduced during recompiling? of code. My own preference is to still use Lame 3.98.4 for general use, but one below is excellent too.
Review is for this last 3.100 working version from link below:
https://codecpack.co/download/LamedropXPd.html
Review is for this last 3.100 working version from link below:
https://codecpack.co/download/LamedropXPd.html
Review by Kit on
Jun 23, 2021 Version: 3.100.1
OS: Windows 7 64-bit Ease of use: 10/10
Functionality: 9/10
Value for money: 10/10
Overall: 9/10
| 38 reviews, Showing 1 to 5 reviews |
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RECENTLY UPDATED = The software has been updated the last 31 days.
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Trialware = Also called shareware or demo. Free Trial version available for download and testing with usually a time limit or limited functions.
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Portable version = A portable/standalone version is available. No installation is required.
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Version history available = Complete changelog on our site.
= Windows version available. = Mac OS version available. = Linux version available.Our hosted software are virus and malware scanned with several antivirus programs using www.virustotal.com. (NOTE! Just one virustotal warning is 99.9% a false positive. And some software might receive 2-6 warnings but it's if they are not all same virus/trojan then it's 99% false positives.)
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