AC3Filter
AC3Filter is a free DirectShow filter for real time audio decoding and processing. It can decode the audio formats AC3, DTS, and MPEG Multichannel.
Features
Features include:
- Playback of video with DTS and AC3 audio tracks,
- Up-mix of any audio track (up to 6 channels),
- Encoding any audio to AC3 and transmitting it over SPDIF.