I know the Horizon discs are listed as 'not-quad', but I'm just wondering what the source of that information is? Right next to that thing about Pye QS quad in the March 13/76 issue of Billboard (that I just posted in another thread) was a regular column that Billboard had spotlighting the best of quad demo tracks, and as you can see it singles out a track from Dave Liebman's 'Sweet Hands' (Horizon SP-702).
Is there definitive proof that this isn't quad (ie Ed Michel saying so) or is the 'not quad' conclusion just based on how it decodes? All 5 of the albums in the Horizon 'SP-70x' series were produced and engineered by Ed Michel and Baker Bigsby, who did all of the ABC/Impulse! Jazz albums in single inventory QS. Also interestingly, they did that one Alice Coltrane album for Warner Bros. in '76 that was a stealth QS, presumably because the label was committed to CD-4, even if quad was dead for them by that point. Could the same be true for Horizon/A&M? By 1975 they were committed to CD-4 as well, so maybe Michel was similarly stealthy with his QS encoding?
View attachment 30715
Just for the record, the 5 titles in the Michel/Bigsby Horizon 'SP' series are:
SP-701 - Thad Jones & Mel Lewis 'Suite For Pops'
SP-702 - David Liebman 'Sweet Hands'
SP-703 - Dave Brubeck & Paul Desmond '1975: The Duets'
SP-704 - Sonny Fortune 'Awakening'
SP-705 - Jim Hall 'Live!'