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Old 22nd December 2007, 17:49   #2163  |  Link
madshi
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Join Date: Sep 2006
Posts: 9,140
Quote:
Originally Posted by Pink Floyd View Post
Can the EAC3to tool be used to downmix DTS 5.1 tracks to normal 2 Channel stereo wav? I need to listen some DTS 5.1 Stuff on the move. I wonder if anyone has the need for stereo downmix.

From the release notes I see that the EAC3to tool uses the Cinemaster Video/ Audio Decoder for DTS Decoding. I messed around the registry keys for the Cinemaster Audio decoder and found that the following key controls the DTS Decoding Options:

HKEY_LOCAL_MACHINE\SOFTWARE\Sonic\CommonMPEGDecoders\4.2\AudioDecoder\DTSOuputOptions. The default for the DTSOuputOptions is 0xb hex.
eac3to is already manipulating these registry values to force the Sonic decoder to output all channels and *not* to downmix. eac3to's purpose is to deliver as many channels as possible. Downmixing to 2 channels is currently not supported. I could probably add that, but I'd need to know how this is usually done technically. Does anybody know? Which channels are mixed in with which volume?
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