In this article
Effect of Phase Shift on Hearing
Audio July 1962 pages 36+
they say that phase shifts of the frequency components are inaudible. This might explain why I hardly heard anything with stereo, but it made a big difference with quad because the quad demodulation needs to have the frequency components phased properly to demodulate the quad for best separation.
http://vintagevacuumaudio.com/magazines-1952-1962/
Effect of Phase Shift on Hearing
Audio July 1962 pages 36+
they say that phase shifts of the frequency components are inaudible. This might explain why I hardly heard anything with stereo, but it made a big difference with quad because the quad demodulation needs to have the frequency components phased properly to demodulate the quad for best separation.
http://vintagevacuumaudio.com/magazines-1952-1962/