Sorry to come late to this party, I've been out of the country.
I don't know the Calrec stuff at all well. There's Derrick Cantrell's
Organ Recital at Hepstonall Parish Church, which I think was the first;
catalogue number AS1 I think.
If it's from 1974, then it could well be 45J. When I was at EMI (1976)
we were still using 45J - I remember producing badges that said "45J -
The Best Sounds Surround" and that would have been 1976-ish.
You should be able to decode with any available UHJ decoder to suit your
speaker array. Worst case I think you'll find the soundstage rotated a
few degrees.
By G-format, Peter C is talking about decoding to a square 4-speaker
array, the default for creating a conventional multichannel disc from
Ambisonic content without requiring the listener to have a decoder (ie
you decode it for them to a configuration that will work for most real
surround listening environments), see:
http://ambisonic.net/pdf/ambisonics_around.pdf. (PDF, 950K)
Peter also mentions the Meridian software decoder, which is not
available. However there are plenty of software decoders available for
download.
Hope this helps,
Best,
-_Richard Elen
On 09/08/2011 05:49, Richard wrote:
Hi all
I have a couple of questions that I suspect may be hard to answer, and that is
regarding the encoding of a LP I have.
I bought this 'Ambisonic' LP in 1977, but it has a recording date of 25th March
1974. It is on the 'Calrec Audio Ltd' label and clearly states the involvement
of the N.R.D.C
Now the questions I have are:
1, If this is truly an early Ambisonic recording, could it be an early version
of UHJ where Y= (0.3225 +- 0.00855j) instead of what is now used Y= (0.3277)
2, Would there be anyway of checking?
3, If it is, is it possible to accurately decode it?
Richard
I believe.... because nothing's impossible
Dreaming-Spires: My home for people with 4 ears
http://the-quad-blog.blogspot.com/
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