I did a quick search and as far as I could discern, no one has posted this before (and forgive me if they have).
The August 4, 1973 issue of Billboard Magazine had a section called "The Quadraphonic Scene." You can read it from page 34-55 of this .pdf:
https://worldradiohistory.com/Archive-All-Music/Billboard/70s/1973/Billboard 1973-08-04.pdf
There are interesting interviews with the likes of Hugo Montenegro, Dick Schory (Ovation records), and Brad Miller (Mobile Fidelity). I never knew Brad produced the first 4-channel radio ad (for Busch Beer). In fact, I never knew there were *any* 4-channel radio ads.
J. D.
The August 4, 1973 issue of Billboard Magazine had a section called "The Quadraphonic Scene." You can read it from page 34-55 of this .pdf:
https://worldradiohistory.com/Archive-All-Music/Billboard/70s/1973/Billboard 1973-08-04.pdf
There are interesting interviews with the likes of Hugo Montenegro, Dick Schory (Ovation records), and Brad Miller (Mobile Fidelity). I never knew Brad produced the first 4-channel radio ad (for Busch Beer). In fact, I never knew there were *any* 4-channel radio ads.
J. D.