Whats the sound quality issues you speak of Gene?
Is it the floaty piano thing you metioned in the Snowmass thread?
Haven’t had the same thoughts here, and we share exactly the same source and Dac.
I WOULD say…
I2s does sound different, immediate impressions is it’s more exact, more laser focussed.
That quality (to me) subconsciously has always signalled “more digital sounding” and by that inferance a “bad thing”, but i2s out the Oppo into the Directstream is different from that.
Its just more accurate, with less artifacts, bloat and ‘added on stuff for flavour’.
My system is very revealing of differences and I have. SET tube amp, but one of the best which has none of the qualities sometimes asscociated with tube amps.
Its hyper accurate and just plays what its fed.
We are into a good thing with our DS Dacs and i2s output Oppos, pretty special digital sources my friend.
I have an equally costed vinyl front end and the digital gives up nothing to it.