In plans. Well, LDAC is just the Bluetooth transfer, sound quality of course depends a lot on used driver and DAC/AMP in your earphones.(and from my experience, even some expensive BT headphones/earphones sounds sooo bad) Of course, please try different quality settings on M0, if it sounds bad with all of them, probably the earphones are the one to be blamed. You can change songs and volume quickly with use of the wheel and double tap on the wheel. If you are using BT headphones, you can use their controls to change volume and skip through songs. Please check if the quality on M0 is set accordingly, maybe the M0 automatically is pushing higher quality setting than Bose supports?