I never heard any distortion while:
- streaming 16 bit 44k1 Hz flac files from my nas, I don’t use Dirac nor Roon. Until I streamed 24 bit 88k1 Hz flac file from my nas the distortion kicked in, for more details refer to Distortion on 24 bit 82.2 kHz track, ref#109. I believe fixing this issue is a prerequisite for distortion free listening with Dirac enabled and/or Roon.
- listening to TV audio through ARC
Furthermore I think there must be a reason why the SA30 isn’t fully Roon certified, the distortion might be part of that reason. As long as the Roon integration isn’t finished completely (certification is part of it) we might encounter bugs related to this integration.