River Past Audio Converter is an easy-to-use, fast, and powerful audio-conversion and -extraction program. It converts audio and extracts audio from video to WAV, MP3, WMA (Windows Media Audio), and audio-only AVI files. The audio formats it converts from include Dolby Digital AC-3, AIFF, AU, MP3, MPA, OGG, SD2, SND, WAV, and WMA. The video formats it extracts audio from include 3GPP, 3GPP2, ASF, AVI, DAT, DivX, IVF, QuickTime MOV, MPEG-4, MPEG-1, MPEG-2, VOB, WMV, and XviD.

The program can be used to rip audio from VCD (VideoCD) or DVD. For WAV, MP3, or AVI output, you have full control over the codec, sample rate, channel, bits per sample, and bit-rate settings. For WMA output, you can choose from a list of Windows Media profiles. The program has easy-to-use batch- processing, no adware or spyware, and a 30-day money back guarantee, and it's extremely fast and reliable.