My principal quad acquisition this week must fall into the ‘super rare’ category. However, I’m not sure I’m really allowed to share it with anyone as it bears the instruction (or is it a warning?!):
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So, proceeding with caution, I can reveal that I now own one of the fabled "BBC Radio Presents Matrix H” demonstration discs:
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These were made for internal evaluation purposes within the BBC and were shared with other EBU broadcasters who were also examining the possibilities of quad broadcasting at the time. This one apparently came from the Manchester regional radio broadcast engineering dept :
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I guess there were never more than a couple of hundred of these pressed so the surviving ones don’t surface very often. I did see one up for sale on eBay in the US at the end of last year and it went surprisingly cheaply, largely I suspect, because the vendor would not ship overseas (rather limiting his market given the greatest interest would be in Europe I would imagine). I had to pay considerably more for this one locally sourced in the UK, but it is in mint condition and of great interest to someone like me who is intrigued by the history of quad and the BBC’s role in its development in particular.
It will be fascinating to hear how the Surround Master copes with Matrix H material (notably in QS mode) aided here by the inclusion of Matrix H directional test tones which are surely a unique resource for anyone experimenting with decoding this format. The disc also contains a fascinating mix of high quality music and drama recordings sourced from the BBC and the other collaborating EBU broadcasters. There is a wealth of information on the individual recorded tracks in the accompanying notes which, for those that are interested, I have posted in the ‘Matrix H Articles’ thread :
https://www.quadraphonicquad.com/forums/index.php?threads/matrix-h-articles.19991/post-418562