ncpl, I'll try non-decoded from Oppo to G68 using DVD with HD621 set for multichannel and see if that's different - this may be instructive, but as Asa says it wouldn't work for Bluray DTA-MA or Dolby TruHD

Sanjay

G68SL, HD722, 2x DSP 640.2 in-wall, DSP5200SE HC, 2x DSP 3200SE, G57+outdoor speakers, Roon Nucleus, Sony BluRay, Sony 4K 75" LCD, turntable setup