An HT bypass switch connects the HT input directly to the preamp output, with no attenuation or gain (AKA unity gain). Therefore, with the switch engaged, the front Left and Right channel volume is controlled by the AVR.
I do not believe that there will be any problems if you disengage the HT bypass switch with preamp and AVR muted.
The AVR signal will behave as any other non-selected source: silence.
If you hear slight crosstalk between the music and the AVR signal (very unlikely), mute the AVR.
I do not believe that there will be any problems if you disengage the HT bypass switch with preamp and AVR muted.
The AVR signal will behave as any other non-selected source: silence.
If you hear slight crosstalk between the music and the AVR signal (very unlikely), mute the AVR.