IIRC, there were only a few hardware SQ and QS encoders (from CBS, Sony, Sansui)
built/used for all of the 1970s matrix encoded content.
I haven't looked at the circuit diagrams of these encoders, but there were obviously
limitations on how accurate the (hardware) 90 degree phase shifters were.
This might be getting way past the point of diminishing returns, but I was wondering
if there could be a (probably software) correction algorithm that reduces the phase
shift error caused by the hardware encoders, this corrected matrix encoded content
could then be processed by the Surround Master.
Kirk Bayne
built/used for all of the 1970s matrix encoded content.
I haven't looked at the circuit diagrams of these encoders, but there were obviously
limitations on how accurate the (hardware) 90 degree phase shifters were.
This might be getting way past the point of diminishing returns, but I was wondering
if there could be a (probably software) correction algorithm that reduces the phase
shift error caused by the hardware encoders, this corrected matrix encoded content
could then be processed by the Surround Master.
Kirk Bayne