[LAU] Decoding/ripping dolby surround CDs

[Rob]

On Thursday 17 November 2011 17:28, Julien Claassen wrote:
>    My CD is one of the "fake surround" ones. Phase shifting sounds
>  likely. But what to do about it. Is there any way, I can split it up in
>  any other format, that would allow me to get something more sensible
>  out of it?

My memory was that the surround channel was added to one channel normally 
and to the other channel inverted, but the Wikipedia article on Dolby 
surround says it's phase-shifted 90 degrees in one and -90 in the other 
(and, apparently, multiplied by sqrt(2)/2).  That's why I didn't mention 
specifics in my first post.

But if you wrote a Csound orchestra to decode DTS noise into stereo, you 
certainly should be able to do it for plain old Dolby surround!  Start 
messing with phase and adding channels together, and you ought to get 
something useful out of it.

Rob