AC3 Audio is commonly used in digital TV and for DVD, where it may be called "Dolby Digital."

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Problem with 5.1 AC-3 through Alsa, Pulseaudio on SPDIF, Ubuntu 14.04

I have Ubuntu 14.04 installed (i386 Architecture) on Zotac ZBOX-ID18. I am trying to output digital surround audio through digital SPDIF output, I understand that the default SPDIF output is on PCM ...
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MEncoder AC3 has no sound when run with VLC

Encoding video with MEncoder (MEncoder SVN R34540 (Ubuntu)) with AC3 codec from lavc, results in no sound on VLC 2.03. The encoded video sounds OK on Totem or Mplayer but there is no sound on VLC. ...
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How to convert 5.1 AAC streams to AC3 for S/PDIF output?

I connect my PC to my home theater via SPDIF, so when watching video files that uses AAC 5.1 channels, it is downmixed to stereo and the surround channels are lost. I would like to be able to convert ...