Many thanks,  Eero!  (I dont know why my search didnt turn these up...)

I see that the transformation used in the first one is simple to describe. 90 degree rotation is not simple, however!

David

At 20:37 20-10-15, Eero Aro wrote:
There's another:

http://www-user.rhrk.uni-kl.de/~junglas/SQdecode/SQdecode.html

Eero

20.10.2015, 20:35, David Pickett kirjoitti:
I dont expect them to ever sound as good as an Ambisonic recording, but
I bought some SQ-encoded LPs today.  I get pleasant results playing them
out of phase with the same on two rear channels at -6 dB.

My reason for writing is to ask whether anyone here knows what an SQ
decoder actually did.  Despite all the BS Ben Bauer spouted when he
presented it to the AES in London (or was it the BKSTS?), I seem to
recall that it wasnt too sophisticated and perhaps, knowing this, one
can synthesize something better than the above in a DAW.

Thanks in advant for any pointers.

David

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