[Milhouse]

Seems to be closing and opening Sink. That may be down to settings.

You want "crossfade between songs" to be set to something (e.g. 5s) in settings/music/playback.
And in system/audio output you want optimised (I think best match stops crossfade working).

I'd recommend trying with Low for resample quality if you are seeing problems (although it doesn't make that much difference to cpu).

Ah yes, a cross-fade of 5 seconds does...a cross-fade! However this isn't quite the same as non-crossfaded "gapless" playback, since the cross-fade is fairly obvious and not entirely desirable.

A value of 1-4 seconds cross-fade still results in brief-silence, and the 5 second cross-fade eliminates this silence, but the resulting cross-faded audio isn't what I would consider to be quite the same as purely "gapless" playback where the two tracks continue seamlessly, with no fade or interruption. I don't mean to sound ungrateful, as in general it's a big improvement, but cross-fading as a solution isn't really appropriate on most gapless tracks (IMHO). I think given the choice, I would accept the very brief silence rather than the cross-fade so that I can listen to the tracks as they were intended to be heard (and no I'm not an audiophile but just realised I might actually be sounding like one! )