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


Sent from my Samsung device

-------- Original message --------
From: Eero Aro <eero....@dlc.fi> 
Date: 06/01/2017  11:28  (GMT+00:00) 
To: sursound@music.vt.edu 
Subject: [Sursound] Professor I Lirpa Quad Matrix 

Hi

The Audio Magazine was one of my 70's favourites.

Their April issue very had an article by the Lirpa Laboratories.

The 1972 April issue had a small article about a new quadraphonic matrix
designed by Professor I Lirpa.

The article is on page 12.

http://www.americanradiohistory.com/Archive-Audio/70s/Audio-1972-04.pdf

:-D

Eero
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