Go to settings > connection prefs > bluetooth > wireless playback quality > LDAC high perfģ. It would be good if someone can try and compare also:Ģ. Now this might be an Android 9 bug - I've been reading that many devices suffer from locked LDAC bitrate, so maybe if you're reading this Sony, time to upgrade to Android 10/11 and give us an easier way to push max LDAC quality on your audiophile DAP anyway, i'm checking now it seems like the sound has lost that slight harshness and is a bit wider, with gained focus and micro details However I read online that apparently there is LDAC performance option in Sony's Music Center app (in addition to the Sony headphones app - bit confusing) and enabling that option to high performance apparently forces the high bitrate at all times (Sony using Android 9 gray area undocumented APIs to force it apparently). It seems there is some funny business with ZX507 LDAC - it keeps being stuck on adaptive no matter where I put it to max (Sony's app, bluetooth settings etc), which might explain why I hear bit of harshness and smaller soundstage compared to the M11 Plus.
