kempfand's Adobe Audition 3.0 SQ and QS Scripts

[malcolmlear]

Here are the tones decoded using the shadow vector method.

 

[malcolmlear]

Here is a decode using the kempfand script. As you found, neither center front or center back decode at all!!.

 

[malcolmlear]

So whats going on?? The only thing that came to mind is its been created digitally and has absolutely perfect phase amplitude relationships. Considering this possibility, I brought the left channel down by just 0.1db. Center front works but not center back.

 

[malcolmlear]

OK then keep the correct amplitude but shift the phase slightly by cutting a sample at the start on the left channel. Now as I suspected center front didn't work but center back did.

 

[malcolmlear]

Here's a decode with slight errors on both amplitude and phase.

 

[malcolmlear]

The question now is whats going on with the script. I do seem to remember a while back someone mentioning a decode fail using test tones. Could it be center extract cannot work properly with two perfectly balanced channels, not knowing how the script works, I cannot say.

 

[Old Quad Guy]

The question this raises is whats really going on here with the script. I seem to remember a while back someone mentioning a decode fail using test tones. Could it be center extract cannot work properly with two perfectly balanced channels, not knowing how the script works, I cannot say.

Not sure how helpful this would be, but here is a very old thread about SQ decoding:

https://www.quadraphonicquad.com/forums/threads/pc-based-sq-decoding-almost-done.4633/

 

[malcolmlear]

Thanks, look quite informative ))

 

[Malcolm2010]

Thanks, look quite informative ))

Malcolm you could try the Quadrafile tones, they are not "perfect" phase as they are from an LP and may work.

they are here:

https://mega.nz/file/xxg0GZYR#jorY2uq3dFpoaX9IBrVV5yewvjEFZvAMTriHjSOcKl4

 

[Malcolm2010]

Thanks, look quite informative ))

this is quite amusing, I was involved in that thread Old Quad Guy References, see post 53.

 

[malcolmlear]

Here's a decode of the Quadrafile tones, and yes the imperfection allows all tones to be decoded. You can see the rears are slightly low as is left front. Also quite a bit of noise.

 

[malcolmlear]

Lastly a decode of the 'SQ Digital Test Tones 24-96.wav' file. Again like mine, center front is too accurate for the AA3 Kempfand script. Also center rear is 'on the edge' and is quite unstable.

 

[Malcolm2010]

This is odd, I would have expected the accurate tones to make decoding easier for the script. The script I use has no issue at all with the digital or Quadrafile test tones, the Quadrafile ones are noisier and not as accurately decoded, but that is to be expected. I will investigate further.

Decoded Quadrafile tones

 

[Malcolm2010]

Decodec Digital tones

It is worth noting I am not using the OD SQ Final or Kempfand's script.

 

[malcolmlear]

Those decodes look very good. I've been using Adobe Audition 3.1 with OD's 'SQ Plus.scp' and Kempfand's newer script 'SQ_dec_AA3_v3.scp'

 

[Owen Smith]

SQ Plus is very old, after that OD made SQ Final available. There was also an SQ script a couple of years ago from The Auroran, and I think enough time has passed for me to confirm that was OD as some people suspected. That makes the Auroran script the most recent SQ one available from OD.

 

[malcolmlear]

Thanks for the confirmation Owen, I suspected that was the case. I've located the SQ-Final and will give that a go. Is the Auroran script available anywhere?

 

[malcolmlear]

Well OD's Final script solves the center front/back decoding issue.

 

[Malcolm2010]

Hi,

Auroran script:

So it appears that the SQ Final script can decode the file (I have not tried it as I don't have it) but the Auroran script has issues with your test tones, very odd. The Auroran script decodes my test tones and Quadrafile but not yours.

Can you attach a copy of SQ Final so I can test please.

 

[malcolmlear]

Hi, here is the SQ Final script.