AC3 Filter is high quality freeware DirectShow audio decoder and processor filter used to decode audio tracks in movies DVD MPEG4 and others. It has a priority on wide functionality and convenient settings.

• AC3 Filter can decode following audio formats: AC3 / DTS / MPEG Audio. It also supports multi-channel and digital SPDIF outputs.
  
  Features of AC3 Filter
  
  
• Decoding of AC3 DTS MPEG1 MPEG2 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