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 _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit account or options, view archives and so on.
