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Owlsroost · 2009-06-28, 20:56

I think there is confusion about what SPDIF can do - it can carry stereo PCM or compressed DD(AC3)/DTS, it cannot carry 5.1 channel PCM (only HDMI can do that).

So the only way to get 5.1 over SPDIF is by sending AC3 or DTS, either as pass-though from the source or by encoding to 5.1 AC3 in real time from a 5.1 source - AC3 filter and FFDShow can both do this (and switch to pass-through automatically if the source is AC3 or DTS).

A few sound cards have 'DD Live' or 'DTS connect' - these can also do real-time encoding to AC3/DTS.

Tony

2009-06-28, 20:56	#7 (permalink)
Owlsroost MP Donator Join Date: Oct 2008 Location: Cambridge Posts: 720 Thanks: 20 Thanked 82 Times in 78 Posts Country: My System	I think there is confusion about what SPDIF can do - it can carry stereo PCM or compressed DD(AC3)/DTS, it cannot carry 5.1 channel PCM (only HDMI can do that). So the only way to get 5.1 over SPDIF is by sending AC3 or DTS, either as pass-though from the source or by encoding to 5.1 AC3 in real time from a 5.1 source - AC3 filter and FFDShow can both do this (and switch to pass-through automatically if the source is AC3 or DTS). A few sound cards have 'DD Live' or 'DTS connect' - these can also do real-time encoding to AC3/DTS. Tony