I guess the easy answer is a variant of that :

- go into the OSD and set all the speakers to 0dB, ignoring the test tones

- play the Avia disk and note the SPL for each channel -- some will be a couple of dB higher than others

- pick a speaker with an SPL "in the middle" and subtract that reading from all the others -- let's say you use center as a reference, then you might get -2dB front left, -3dB front right, +1dB surround left etc...

- go into the OSD and adjust the settings accordingly, ignoring the pink noise again

- run Avia and see how you did... hopefully all channels will play at the same SPL now


M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8