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BBC QUAD Broadcasts-specifically SQ and QS

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fizzywiggs41

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Way back The ABC in Melbourne Had a program on Saturday morning
Playing BBC Quad Matrix at the time I was taking My Daughters all over the
place Dancing /Flute/Gym
I recorded a couple of programs on Cassette
Part of Tomita in SQ SnowFlakes.
Part Concert 6 Wives Henry 8th SQ
Ronnie Aldrich SQ plus other tracks all in SQ

I still have the cassette copy of this you sent me Ron . :)
 

fizzywiggs41

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Was that album released in "quad" or maybe it was not marked that way?

Yes the first editions were.

And they were unmarked QS quad. There is a little thread on this btw , it should be in "the quad discographies listings " somewheres.
 

fizzywiggs41

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Of course it’s just possible that he didn’t comment on the BBC’s SQ and QS test transmissions because they never happened isn’t it?

In the summary article by him that you show, isn’t it odd that he doesn’t compare any such supposed SQ and QS broadcast trials with the H trials, even in passing? Given his preference for the QS system he would surely have cited any performance benefits demonstrated under broadcast conditions if there had ever been any such evidence he could have called on to advance his argument.

Maybe .

I don't think there were any "official " SQ or QS test broadcasts . But if there were they could have been off hours , much like the discrete ones , but I'm guessing .


But for the BEEB to play randomly SQ or QS as blind tests is quite plausable as they need unbiased listeners.

Also please keep in mind they rejected both as their go to quad matrix .
 

fizzywiggs41

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Exactly, as I've always said, there weren't any.

Call them tests or demos whatever you prefer , and they obviously did occur....... UNOFFICIAL , and most obviously you missed out.

All relevant questions that you might consider addressing to the BBC Complaints Department .
I do not , nor have I ever worked for the BBC.
 

V96GLF

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I know for sure that in the mid/late 70s a BBC R3 engineer recorded many proms (possibly a full prom season) in binaural for his personal collection. Whether any of those recordings were ever broadcast or otherwise escaped into the wild, I do not know.
 

fizzywiggs41

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I know for sure that in the mid/late 70s a BBC R3 engineer recorded many proms (possibly a full prom season) in binaural for his personal collection. Whether any of those recordings were ever broadcast or otherwise escaped into the wild, I do not know.

Yep , I was reading about one that was called "Oil Rig ".

Was broadcast sometime in 77 or 78 , so they were doing trial and error binaural then as well as H and HJ. :)
 

stevendive

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Here were the systems used in the BBC matrix trials:

Matrix A was QS, no logic.
Matrix B was SQ, no logic.
Matrix C was QS, with logic.
Matrix D was SQ, with logic.
Matrix E was a tetrahedral matrix Peter Scheiber proposed for high separation.
Matrix F was UMX (BMX), no logic.
Matrix G was matrix F modified to reduce the phasey stereo image.
Matrix GX was G modified to reduce the phasey stereo image. (GX was not tested in the trials.)
Matrix HX was GX further modified to reduce the phasey stereo image. (HX was not tested in the trials.)
Matrix H was Matrix HX further modified to reduce phasiness.
Matrix J was H further modified to reduce phasiness. (This was done after the trials ended.)
Matrix HJ was J further modified to reduce phasiness. (This was done after the trials ended.)
Matrix HJ was later renamed UHJ.

When I read the BBC articles, I was surprised that neither EV matrix was tested. They have higher front-to-back separations and a higher left-front-to-right-front separations than any of the systems tested, ideal for classical music. I think they were wanting an all-channels-equal system, which neither EV system had.

I wonder if Matrix B was an SQ 10-40 decoder, or decoded the corner modulations without blending.

Note that Matrix A and Matrix C used the same QS recordings.
Matrix B and Matrix D used the same SQ recordings.
It’s worth noting that UHJ is not just HJ rebadged. UHJ is the hierarchy of ambisonic fold downs into 2 to 4 channels from B-format.
 

V96GLF

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Yep , I was reading about one that was called "Oil Rig ".

Was broadcast sometime in 77 or 78 , so they were doing trial and error binaural then as well as H and HJ. :)
I have remembered his name: Tony Askew. This was very much an unofficial “hobby” project, and as he explained it to me he had arranged for a dummy head to be hung above the orchestra (much to their amusement), and he was running it to his own reel-to-reel sat alongside the official R3 mixing desk. He was responsible for the live R3 broadcast mix.

Googling Tony, I see he has composer credits for a track on a couple of Radiophonic Workshop releases. Must be the same chap.
 
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