I'm not sure if this got mentioned explicity in previous discussion. Blue Ripple Sound have a free utility for conversion of UHJ into B-format. For those of us who routinely work with B-format, that's clearly the easy way to go to tackle the problem of conversion of UHJ to something useful as multichannel. It's available for download at the bottom of this page: http://www.blueripplesound.com/free-stuff
I had previously used a rather painstaking process involving my having generated six IRs representing the complex arithmetic, performing 6 convolutions, and then matrixing the result. All of which took quite some time. The Blue Ripple Sound UHJ utility seems to give exactly the same result, but in much less time. Eric ----- Original Message ---- From: Richard Lee <[email protected]> To: Surround Sound discussion group <[email protected]> Sent: Tue, August 23, 2011 10:28:38 PM Subject: Re: [Sursound] Questions regarding a very early 'Ambisonic' LP > Peter also mentions the Meridian software decoder, which is not available. However there are plenty of software decoders available for download. Duu.uuh! Mr. Elen, could you please provide some links to these. I've already checked the Unobtainium Software website for software UHJ decoders. BTW, though I suggest a way to distinguish between RM & UHJ/45J, I agree with the gurus who suggest it is probably 45J. A UHJ decoder will decode Matrix H nicely. If you can tweak it to 45J, even better. The "phase amplitude pan locus" for Matrix H is discontinuous but not as badly as the seriously wonky SQ. 45J was designed to be inside the Matrix H spec and would probably give "better" results than "dedicated" Matrix H decoddrs. IIRC, apart from the ve...ry early experiments, the BBC used 45J and UHJ decoders for all their work. GV Malham, is Howard Smith still around? I don't think he made the move to AMS. _______________________________________________ Sursound mailing list [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound _______________________________________________ Sursound mailing list [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound
