Phase and Amplitude correct SQ & QS test tones

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Malcolm2010

300 Club - QQ All-Star
Since 2002/2003
Joined
Dec 9, 2002
Messages
336
Location
Durham, England
Hi all,

here is a link to my digitally produced Phase and Amplitude correct SQ & QS test tones to check out your software/hardware decoder. These are the tones used by Richard (Oxforddickie) to finalise and tweak his software decoding scripts and hosted by Jim (Old Quad Guy) on the Quadraphonic Info site. Tone sequence information is included in the file.

Enjoy.


http://www.quadraphonic.info/SQandQS/
 

malcolmlear

Active Member
Joined
Apr 7, 2008
Messages
83
Location
Colchester UK
Hi,
I'm busy designing a multi system decoder based on a high end ARM processor and thought these test files may well be useful. However it seems there is a problem with QS centre left and right. There should simply be tones either on Lt or Rt, but seem to be a mix with a 90 degree phase difference which would place the sound nearer the centre of the room. I'm creating my own files now as I believe OD has also done but just thought it should be mentioned.
 

Malcolm2010

300 Club - QQ All-Star
Since 2002/2003
Joined
Dec 9, 2002
Messages
336
Location
Durham, England
Hi,
I'm busy designing a multi system decoder based on a high end ARM processor and thought these test files may well be useful. However it seems there is a problem with QS centre left and right. There should simply be tones either on Lt or Rt, but seem to be a mix with a 90 degree phase difference which would place the sound nearer the centre of the room. I'm creating my own files now as I believe OD has also done but just thought it should be mentioned.
The test tones OD used are (or were) the same set, I will check them but they did agree with the QS specification and were tested agains the QS side of Quadrafile.
 

oxforddickie

1K Club - QQ Shooting Star
Joined
Feb 28, 2009
Messages
1,104
Location
UK
I too found issues with both the SQ and QS tones, so created encoders so i could produce accurate tones that were used in the creation of the /II processes
 
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