AC3Filter - it is DirectShow filter for AC3 decoding to play .AVI
with AC3 audio tracks and MPEG2 (DVD). Distributed absolutely for
free (FREEWARE, OpenSource). Sorry if my English is bad, but I think it
is better to have something than nothing.
Full AC3 standart compliance.
S/P DIF passthrough support.
Decode MPEG2 PES streams.
Multichannel output support.
Dynamic Range Compression (DRC) support.
Overflow control and automatic gain control.
Gain levels control.
Bitstream information (channel format, bitrate, sample
rate, coupling freq and maximun freq).
Matrix mixer with direct control of mixing matrix.
Stereo to multichannel mixing.
Other tools available from the same author:
AC3Filter tools is a set of command-line tools for manipulating audio files. It includes AC3 encoder and decoder, SPDIF format converter, parametric filter, graphic equalizer and more.
AC3File - AC3File is a DirectShow source filter. It is required to read any kind of AC3 or DTS files.
Spdifer - Spdifer is a DirectShow filter that allows media players to passthrough multi-channel sound to the digital (SPDIF) output without any change, so an external receiver can decode it.