This software allows batch conversion of various audio formats including DVD, 3GP, AVI, MP3, and more to AIF, MP3, OGG, WAV, WMA or M4A.

If you have the River Past MPEG-4 Booster Pack installed, you can also output to M4A (MPEG-4 AAC audio). This format is widely used by iTunes and iPod. The MPEG-2 Booster Pack offers the capability to convert to MPEG Audio layer-2, which means that you can have extensive flexibility in working with your audio files.
This software is simply amazing when it comes to audio conversion. It is capable of converting many audio file formats including 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).
This audio converter can also extract audio from a wide range of video formats including mobile phone 3G video (3GPP / 3GPP2), ASF (Advanced Streaming Format), AVI, VCD DAT, DivX, DV, IVF, MKV (Matroska Video), QuickTime MOV, MP4 (MPEG-4 video), MPG (MPEG-1 and MPEG-2 Video), RealMedia RM, OGM (OGG Media), DVD VOB, WMV (Windows Media Video) and XviD. This makes it incredibly easy to extract audio from videos and use it in other applications.
The River Past Audio Converter also offers full control over codec, sample rate, channel, bits per sample, and bitrate settings. For WMA output, you can also choose from a list of Windows Media profiles. Tags are supported for MOV, WMA and MP3 formats.
The latest version of the software introduces the ability to add a DirectShow decoding method (file reader, splitter, decoder) to expand the input file format support. When using this, you can expand compatibility even further.
Finally, the River Past Audio Converter is completely free of Adware and spyware. To use it, you only need to have DX8 and Windows Media Format 9 runtime installed. These can be downloaded from the website. The software is also compatible with Windows Vista, and comes with a 30 day money back guarantee.
Version 7.8: N/A
Version 7.7.11: N/A
Version 7.6.9: Added the ability to convert from Matroska .mkv files, and OGG Media .ogm files..
Version 7.6: Added the ability to convert from Matroska .mkv files, and OGG Media .ogm files..
Version 7.5.1: Added the ability to convert from Matroska .mkv files, and OGG Media .ogm files..
Version 7.4.1: Added the ability to convert from Matroska .mkv files, and OGG Media .ogm files..
Version 7.3: Added the ability to convert from Matroska .mkv files, and OGG Media .ogm files..
Version 7.2.6: Added the ability to convert from Matroska .mkv files, and OGG Media .ogm files..
Version 7.0: Added the ability to convert from Matroska .mkv files, and OGG Media .ogm files..
Version 6.9: Added the ability to convert from Matroska .mkv files, and OGG Media .ogm files..