Recently I’ve buyed Pi 3 to replace my Pi 1 B model. Mostly because of built in bluetooth. Rasplex has built in pulseaudio - when I connect my phone to it - it recognizes RasPlex like my BT Car audio - and send music via BT. Unfortunately I don’t have sound from HDMI or analogue output from raspberry. I am using 1.6.2 build, on 1.0.3 it was the same situation.
I am currently at 1.6.2 - Pi is connected to Denon AVR-2113 so output is HDMI passthrough. I have sound from movies etc, everything played from Pi, but no sound from connected phone via BT
Because that’s the Bluetooth drivers and connection software doing that, it makes a connection, there is no audio functionality to support audio from a BT device to the RPi, as I stated previously
I think that this (audio from phone via bluetooth to HDMI) would be nice, allthough outside the scope of rasplex. I did some investigations and note my findings here.
If you connect your phone to rasplex and use it for media playback, then a connection with the pulseaudio sound server is created. In the pulseaudio command line you can also see this connection: # PULSE_RUNTIME_PATH=/var/run/pulse pacmd opens a shell to interact with the pulseaudio sound server, and inside this shell you can show the sound sources available to pulseaudio with list-sources. Sadly, if you display the “sinks” (sound targets) of pulseaudio with list-sinks, you will see that pulseaudio only has a “null-output”. Most likely (I did not test this) there will be another one added if a bluetooth speaker is connected to rasplex.
If we would be able to get an HDMI output from pulseaudio, I think the bluetooth audio transfer should be no problem. I’m not sure here, but I think this can be hard to do since the plexhometheater seems to access the HDMI audio through a more direct approach. Maybe someone who knows the internals some more could comment here if there is a chance to get further with some thinkering?