The dll's listed must be included in your ...\AviSynth 2.5\plugins folder.
Some files are included because are from the BeHappy team, other must be downloaded.
With this release all bass*.dll are included because problems with name and old versions,
if owners don't authorize this distribution I can delete the files. Remember (1)

NicAudio.dll	2.0.4   To decode AC3, DTS, MPEG, LPCM, and other uncompressed formats (included)

BassAudio.dll   2.4.10   Interface to open Bass Audio libraries v2.4.10 in AviSynth (included)

bass.dll        2.4.10   16/02/2013 Main bass library, to open WAVE_FORMAT_EXTENSIBLE, mp2, mp3, ogg, ...Link(1)
bass_aac.dll    2.4.4    11/06/2013 Optional to read AAC/MA4/MP4. Link(1)
bass_ape.dll    2.4.2    25/11/2014 Optional to read APE Monkey audio. Link(1)
bass_cda.dll    2.4.6    11/06/2014 Optional to read CD Audio. Link(1)
bass_flac.dll   2.4.2    28/11/2014 Optional to read Flac until v1.2.1. Link(1)
bass_mpc.dll    2.4.1.2  13/11/2013 Optional to read MPC, MusePack. Link(1)
bass_spx.dll    2.4.3    11/12/2014 Optional to read SPX, MusePack. Link(1)
bass_tta.dll    2.4.0    27/02/2008 Optional to read TTA, True Audio encoder. Link(1)
bass_wma.dll    2.4.5    20/10/2014 Optional to read WMA, Windows Media Audio. Link(1)
bass_wv.dll     2.4.5    22/07/2014 Optional to read WV, WavPack Audio. Link(1)
bass_opus.dll   2.4.1.3  12/12/2013 Optional to read Opus. Link(1)

soxfilter.dll   If you want use the Upmix DSP function (or for others many uses). Link (2)

(1) The oficial releases v2.4 are in http://www.un4seen.com/bass.html

(2) http://forum.doom9.org/showthread.php?p=761154#post761154

