I have a PiZeroW set up as a headless Spotify connect device. The OS is the latest Raspbian Stretch. I have the audio output connected through a Pimoroni PHAT DAC. The device is setup using instructions from Raspotify.
This setup works perfectly well with good connection and audio. I am now trying to extend the capability of this device to become a bluetooth connection for audio from other sources, I installed the bluetooth package that includes blueman bluetooth manager and pulse audio:
sudo apt-get install blueman pulseaudio pavucontrol pulseaudio-module-bluetooth
I am able to see the PiZeroW on my bluetooth devices and am able to connect the devices to the Pi and vice versa. From the VNC viewer I am able to see that the sound and audio control panel see the HiFiberry DAC as the input device and the output device but there is no audio being played.
pi@pizerow:~ $ aplay -l **** List of PLAYBACK Hardware Devices **** card 0: sndrpihifiberry [snd_rpi_hifiberry_dac], device 0: HifiBerry DAC HiFi pcm5102a-hifi-0  Subdevices: 0/1 Subdevice #0: subdevice #0 pi@pizerow:~ $ pi@pizerow:~ $ aplay -L default Playback/recording through the PulseAudio sound server null Discard all samples (playback) or generate zero samples (capture) sysdefault:CARD=sndrpihifiberry snd_rpi_hifiberry_dac, Default Audio Device dmix:CARD=sndrpihifiberry,DEV=0 snd_rpi_hifiberry_dac, Direct sample mixing device dsnoop:CARD=sndrpihifiberry,DEV=0 snd_rpi_hifiberry_dac, Direct sample snooping device hw:CARD=sndrpihifiberry,DEV=0 snd_rpi_hifiberry_dac, Direct hardware device without any conversions plughw:CARD=sndrpihifiberry,DEV=0 snd_rpi_hifiberry_dac,
This is the output of the aplay -l / -L commands.
As I mentioned the device works well as a wireless Spotify dvice so I know the DAC is functioning and the output leads are properly soldered.