play some tunes, and unplug the HDMI cable to your tv from cable box.
this was my problem. when critical jamming, i unplug the HDMI cable. as quiet as a nun double clicking the mouse checking email.
also I bought some Belden better shielded cable for amp to preamp, worked also !
Belden cables shielded better than the qudioquest topaz cables, have another pair, forget the name, great stuff, but the bolden shielded the radio tower, as i had high pitched radio chatter from my tweeters,
try cables, and TRYT unplugging that darn HDMI cable.
DO they make a better shielded hdmi cable for this , or am i just doomed to unplug when listening?
im in the boat with you, .....lets share the oar .....we will figure this out, there are some very sharp people iim here. They have helped me for quite a many years.
im keeping an eye on this one...........