My favourite one is Lirpa 5KG, especially the oscilloscope screen photos. There 
was also a turntable that played both sides of the record at once, but I 
digress.

umashankar

Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10

From: Eero Aro<mailto:eero....@dlc.fi>
Sent: Friday, January 6, 2017 7:06 PM
To: sursound@music.vt.edu<mailto:sursound@music.vt.edu>
Subject: Re: [Sursound] Professor I Lirpa Quad Matrix

Oh, zero group-delay wickers are rare as hen's teeth these days...

But I am certain that professor Lirpa's VDRS, Vehicular Disc Reproduction
System, that solved almost all vinyl disc player problems, would have
improved matrixed surround sound on vinyl discs as well, if it would not
have been forgotten when digital audio started to take over:

http://www.americanradiohistory.com/Archive-Audio/70s/Audio-1978-04.pdf

Page 71 ->

Eero

6.1.2017, 14:22, Dave Malham wrote:
> :-) :-) :-)

>> Looks good. I'm off to the forest now to find some phase coherent twigs
>> and zero group-delay wicker.Wish me luck ;-) :-)
>> Andrew
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