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AC3Filter is a high quality free DirectShow filter designed for real time audio decoding and processing. It has a priority on wide functionality and convenient settings. Filter can decode following audio formats: AC3/DTS/MPEG Audio. It also supports multi-channel and digital (SPDIF) outputs.

Features:

• Decoding of AC3/DTS/MPEG1/2 Audio Layer I/II formats
• Support of DVD, AVI/AC3, AVI/DTS, WAV/AC3 and WAV/DTS
• Audio processing for any source
• Decomposition of any source to 6 channels
• Full information about audio track format
• Support of SPDIF passthrough mode
• Multi-channel audio output from all sources on SPDIF (on-the-fly AC3 encoding)
• Per-channel amplification for all input/output channels
• Per-channel delays (for compensation of distance difference to speakers)
• Automatic gain control
• Clipping
• Dynamic Range Compression, DRC
• Level indication for input and output channels
• Matrix mixer and ability of direct modification of mixing matrix
• Dolby Surround / Pro Logic / Pro Logic II downmix