River Past Audio Converter is an easy-to-use, fast,
and powerful batch audio conversion and extractor
software.

It outputs AIF, AVI, MKA (Matroska Audio), MP3, OGG
Vorbis, WAV or WMA.

With River Past MPEG-4 Booster Pack installed, you can
output to M4A (MPEG-4 AAC audio), the format used by
iTune and iPod.
With MPEG-2 Booster Pack, you can convert to MPEG
Audio layer-2.

It can convert from Dolby Digital AC-3, Apple AIF
(AIFF/AIFC), Monkey audio APE, Unix AU, FLAC (Free
Lossless Audio Codec), MP3 (MPEG Layer-3), M4A (MPEG-4
Audio), MKA (Matroska Audio), MPA (MPEG-1 Audio), MPC
(MusePack/MPEG Plus), OFR (OptimFROG), OGG Vorbis,
RealAudio RA/RAM, SD2 (Sound Designer 2), SND, TTA
(The True Audio encoder), WAV and WMA (Windows Media
Audio). It can also extract audio from mobile phone 3G

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