I don’t know what you’re using as a source, but if you ever have the time/inclination, I’d be interested to know if the NOS mode plays well with external oversampling (could be through Roon, Audirvana, HQPlayer, etc).
Speaking of which, I have a half-written oversampling guide that I’m hoping to post at some point since I fell down the rabbit hole a few weeks ago, might as well share, lol.
EDIT: Guide is now posted here!