I've installed the DAC+ and it appears to be properly recognized. Bluetooth audio is connected from iPhone (I've tested it without the DAC+ and that worked fine also). But there is no sound.
pi@raspberrypi ~ $ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: sndrpihifiberry [snd_rpi_hifiberry_dacplus], device 0: HiFiBerry DAC+ HiFi pcm512x-hifi-0 
Subdevice #0: subdevice #0
What would you suggest?
DAC+ No sound