Fully buffered file playback

I have been comparing the sonic qualities of a RPI3/Piano 2.1 of FLAC files played off a NAS via 100Mpbs
and those local on a 128G USB Key.

There is a clear difference . A lot more haze and fatigue in the NAS source verse the 128G USB Key.
I don’t think I am the only to notice this difference.

This difference exists even with a maxed out prefetch buffer 12MB and 40%

Is there a feature to to completely prefetch the NAS file to a local RAM disk partition and then
play it from there?

I think we will do it someday