Back in May I upgraded my jukebox to a Raspberry Pi 3, but couldn't get the cheap USB soundcard I had been using with the 2+ to work.
Fortunately the built in sound of the Raspberry Pi 3 was better than the abysmal one in the Raspberry Pi 2+.
So I grabbed an Onyx Blackjack I had lying around and attached that; it worked as soon as I changed the mpd.conf - and sounds much better. A usb hub is needed to power it, but the increase in sound quality is worth the wattage.
Yay sound! ⊗