[How-to] set up Bluetooth audio

HowTo
141

I’ve got this weird problem. My phone connects to my OSMC RPi3 and streams fine. However, audio output is HDMI, no matter how I edit my config. When I play something throuh Kodi, it plays normally through my hifiberry output.

[Unit]
Description=Bluealsa daemon
Documentation=https://github.com/Arkq/bluez-alsa/
After=dbus-org.bluez.service
Requires=dbus-org.bluez.service
StopWhenUnneeded=true

[Service]
Type=dbus
BusName=org.bluealsa
EnvironmentFile=-/etc/default/bluealsa
ExecStart=/usr/bin/bluealsa  -D default:CARD=sndrpihifiberry -p a2dp-sink  --a2dp-volume
Restart=on-failure
ProtectSystem=strict
ProtectHome=true
PrivateTmp=true
PrivateDevices=true
RemoveIPC=true
RestrictAddressFamilies=AF_UNIX AF_BLUETOOTH
; Also non-privileged can user be used
;User=bluealsa
;Group=audio
;NoNewPrivileges=true

[Install]
WantedBy=bluetooth.target

And my aplay -L:

$ aplay -L
null
    Discard all samples (playback) or generate zero samples (capture)
default
    Default Audio Device
sysdefault
    Default Audio Device
bluealsa
    Bluetooth Audio Hub
btaudio
    Bluetooth Audio
hw:CARD=vc4hdmi,DEV=0
    vc4-hdmi, MAI PCM i2s-hifi-0
    Direct hardware device without any conversions
plughw:CARD=vc4hdmi,DEV=0
    vc4-hdmi, MAI PCM i2s-hifi-0
    Hardware device with all software conversions
default:CARD=vc4hdmi
    vc4-hdmi, MAI PCM i2s-hifi-0
    Default Audio Device
sysdefault:CARD=vc4hdmi
    vc4-hdmi, MAI PCM i2s-hifi-0
    Default Audio Device
hdmi:CARD=vc4hdmi,DEV=0
    vc4-hdmi, MAI PCM i2s-hifi-0
    HDMI Audio Output
dmix:CARD=vc4hdmi,DEV=0
    vc4-hdmi, MAI PCM i2s-hifi-0
    Direct sample mixing device
hw:CARD=sndrpihifiberry,DEV=0
    snd_rpi_hifiberry_dacplus, HiFiBerry DAC+ Pro HiFi pcm512x-hifi-0
    Direct hardware device without any conversions
plughw:CARD=sndrpihifiberry,DEV=0
    snd_rpi_hifiberry_dacplus, HiFiBerry DAC+ Pro HiFi pcm512x-hifi-0
    Hardware device with all software conversions
default:CARD=sndrpihifiberry
    snd_rpi_hifiberry_dacplus, HiFiBerry DAC+ Pro HiFi pcm512x-hifi-0
    Default Audio Device
sysdefault:CARD=sndrpihifiberry
    snd_rpi_hifiberry_dacplus, HiFiBerry DAC+ Pro HiFi pcm512x-hifi-0
    Default Audio Device
dmix:CARD=sndrpihifiberry,DEV=0
    snd_rpi_hifiberry_dacplus, HiFiBerry DAC+ Pro HiFi pcm512x-hifi-0
    Direct sample mixing device

I want BT to stream to hifiberry output, but I don’t know how to troubleshoot. Please help…