New subject: Decoding/ripping dolby surround CDs

19 Nov 2011

On Sat, 2011-11-19 at 12:00 +0000,
linux-audio-user-request(a)lists.linuxaudio.org wrote:
...
  Message: 1
 Date: Fri, 18 Nov 2011 10:36:43 -0500
 From: Rob &lt;lau(a)kudla.org&gt;
 Subject: Re: [LAU] Decoding/ripping dolby surround CDs
 To: Julien Claassen &lt;julien(a)mail.upb.de&gt;
 Cc: linux-audio-user(a)lists.linuxaudio.org
 Message-ID: &lt;201111181036.44095.lau(a)kudla.org&gt;
 Content-Type: Text/Plain;  charset="iso-8859-1"

 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 
You reach the point, when I'm unable to resist to reply ;).

1. The German Wiki about this bullshit says, that "Dolby-Surround"
"is"
compatible to everything, e.g. stereo. It "will" sound as wanted, when
played in stereo.
http://de.wikipedia.org/wiki/Dolby_Surround

2. ½ of 180° phase shift * (1,41/2) should be ok in stereo :D? That's
theory.

Anyway, among other jobs I worked as an video and audio engineer for a
well known German filmmaker and professor. "Dolby Laboratories" are a
mafia. If you make movies using light audio for cord ("celluloid" or
equivalent material ;) you'll notice some un-shy wow and flutter. You
need to pay a lot of money to use Dolby to avoid this issue, no sane
film maker does, excepted of those who are antisocial and take all the
money they can get from furtherances. Dolby comes back for more, to
cheat people, so they invented all that surround bullshit, that does
sound odd.

Any "material" encoded by that kinds of "film Dolby" belongs to
/dev/0.

I experienced Dolby C as a very good procedure for maintained analog
homerecording audio equipment, but that's another story.

Dolby for audio is the equivalent to Apple and Microsoft for computers.
They are robbers. They do some good jobs, but most they do is
"business".

This CD belongs to the hazardous waste, it's that simple.

2 Cents, YMMV,

Ralf