AC3filter

AC3filter is a free DirectShow filter designed for real-time audio decoding and processing. The filter decodes AC3/DTS audio formats, supports multichannel and/or digital (S/PDIF) outputs. It is possible to play AVI and MPEG-2 (DVD) files with AC3 audio tracks.

Features:

• Decodes AC3 / DTS / MPEG-1/2 Audio Layer I/II formats
• Supports DVD, AVI/AC3, AVI/DTS, WAV/AC3 and WAV/DTS
• Handles sound from any source
• Decomposition of any source into 6 channels
• Full track format information
• SPDIF passthrough support
• Outputs multi-channel audio to SPDIF from any source (encoding to AC3 on the fly)
• Channel-by-channel amplification for all input/output channels
• Channel-by-channel delays (to compensate for different distances to speakers)
• Automatic gain control
• Clipping
• Dynamic Range Compression (DRC)
• Level indication of input and output channels
• Matrix mixer and the possibility to change the mixing matrix directly.
• Dolby Surround / Pro Logic / Pro Logic II mixing
• Equalizer
• Sound spectrum analyzer.