River Past Audio Converter is River Past's award winning audio converter and extractor.

Convert from almost any audio format to WAV, MP3, WMA, or audio-only AVI. We support a variety of input formats, including the standard WAV, MP3, WMA, AIFF, RealAudio, and the not-so-standard OGG, AIFF, and Unix Audio.

Extract audio from the standard AVI, ASF, WMV, MPEG-1 and MPEG-2, RealMedia, and the not-so-standard QuickTime MOV and MPEG-4.

If the file format exists, we probably support it.

River Past Audio Converter convert audio or extract audio from the following file formats:

3G2 - 3GPP2 Mobile Video(*.3g2, *.3gp2, *.3gpp)
3GP - 3GP Mobile Video(*.3g, *.3gp, *.3gpp, *.k3g)
AC3 - Dolby Digital AC-3 Audio(*.ac3)
AIF - AIFF/AIFC Apple Audio(*.aif, *.aifc, *.ief)
APE - Monkey Audio(*.ape)
ASF - Advanced Streaming Format(*.asf)
AU - UNIX Audio(*.au)
AVI - Audio Video Interleaved(*.avi)
DIVX - DivX Video(*.divx)
DV - Digital Video Cassette(*.dv)
DVD - Digital Versatile Disk(*.vob)
FLAC - Free Lossless Audio Codec(*.flc)
FLV - Flash Video(*.flv)
M4A - MPEG-4 Audio(*.m4a, *.mp4)
MKV - Matroska Video(*.mkv)
MOV - QuickTime Movie(*.mov, *.qt)
MP3 - MPEG Layer-3(*.mp3)
MPA - MPEG Audio(*.mp2, *.mpa)
MPC - Musepack(*.mpc)
MPEG-1 - MPEG-1 Video(*.mpg)
MPG/MPEG-2 - MPEG-2 Video(*.mpg)
MP4/M4V - MPEG-4 Video(*.m4v, *.mp4)
OFR - OptimFROG Audio(*.ofr)
OGG Vorbis - OGG Vorbis Audio
OGM - OGG Media(*.ogm)
RA - RealAudio(*.ra)
RM - RealMedia(*.rm)
SD2 - Sound Designer 2(*.sd2)
SHN - Shorten Audio(*.shn)
SND - Unix Sound(*.snd)
SVCD - Super VCD(*.dat)
TTA - The True Audio codec(*.tta)
VCD - VideoCD 2.0(*.dat)
WAV - Waveform(*.wav)
WMA - Windows Media Audio
WMV - Windows Media Video(*.wmv)
XVID - XVID Video(*.xvid)
VOB - DVD Media File(*.vob)
AAC - Advanced Audio Coding(*.aac, *.aacp)
AMR - Adaptive Multi-Rate(*.amr)
EVOB - HD-DVD and BlueRay Enhanced VOB(*.evob)
HDTV - High Definition Video(*.tp, *.ts)
PVA - Hauppauge Video Recording(*.pva)


Output Formats:
AIFF/AIFC Apple Audio
MPEG-4 Audio
MPEG Layer-3
MPEG Audio
OGG Vorbis Audio
RealAudio
Waveform
Windows Media Audio


Codec Control
With WAV, MP3, and audio-only AVI output, you have the full control over sample rate, channel, resolution (8-bit or 16-bit), and bitrate.

With WMA output, you have the choice of many pre-defined profiles, targeted at different usages.

Batch Conversion
River Past Audio Converter is a batch converter. You can add a list of files, set the output format, and let it run. A well organized progress dialog will predict how long it takes to convert all the files, so you can do something else and come back when it finishes.