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AC3 Filter是一款高质免费的DirectShow音频解码和处理过滤软件，对于玩视频处理器的朋友必定十分熟释，它支持AC3/DTS/MPEG的音频解码，是视频播放的好伴侣，现时更新到1.06a版。
下载地址：http://www.free-codecs.com/AC3_Filter_download.htm
特点：- Decode AC3/DTS/MPEG Audio Layer I/II formats- MPEG1/2 PES demultiplex (for DVD support)- PES/LPCM format support- AVI/AC3, AVI/DTS, WAV/AC3 and WAV/DTS support- AC3/DTS/MPEG Audio SPDIF passthrough support- AC3 encode to output any multichannel source to SPDIF- Detailed input bitstream format information- Automatic Gain Control- Dynamic Range Compression- Online output configuraion change- Upmix from any stereo source to 3-6 channels- Downmix to DolbySurround/ProLogic/ProLogic2- Input/output levels indication- Per-channel gain for all input/output channels- Per-channel delays- Direct access to mixing matrix
编译自：http://www.warp2search.net/modules.php?name=News&file=article&sid=29316