AC3Filter is a free audio decoder and processor filter. It allows media players to playback movies with AC3 and DTS audio tracks. Also it can process any audio track; much of processing options allows adjusting the sound in almost any way. It is possible to up mix any audio source to six channels. Filter can do multi-channel and digital (SPDIF) output. It can encode any audio source to AC3 on-the-fly and send it over SPDIF to the receiver.
What's new in this version:
Version 2.6b has added Serbian language and fixed bug where some languages was reset to English after restart.