AC3Filter音效外挂插件，目前DVDrip在制作音频部分时普遍采用两种方式：MP3格式压缩音轨和保留DVD中原有的AC3音频文件。一般来说，Windows操作系统已经自带了MP3的解码器——Fhg Radium MP3codec，因此采用MP3格式做的DVDrip音频我们都可以听到。但对于以AC3音频文件制作的DVDrip，我们就只能看到图像而听不到声音了。此时就应下载安装AC3音效的外挂插件 - AC3Filter。使你的系统可以正常播放AC3音轨的AVI(DivX/Xvid) 。

Features of AC3 Filter 1.20 :
- 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

Changes in AC3 Filter 1.20b :
- Fixed bug with some 14bit DTS streams
- SPDIF input support
- Autodetection of SPDIF stream in PCM16 data
- New SPDIF/DTS passthrough mode
- DTS conversion to 14bit to decrease the level of possible noise

官网：http://ac3filter.net/

下载：
http://www.vistacodec.com/files/ac3filter_1_20b.zip
http://www.freecodecs.net/files/ac3filter_1_20b.zip

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