Tnx!
In fact, I have already performed the following steps (OE 7.90.005)
1) bluetooth pairing verificiation (but where is the config file).
2) switch kodi audio output to PULSE.
3) found out that pa does not recognize my sound card. (I use hifiberry_digi.)
4) fix the problem using 'pactl load-module module-udev-detect'
What is the recommended/best way for enforcing pa module loading?
(autostart.sh)
Configuration via systemd works
~/.config/system.d/pulseaudio.service
---------------------------------------------------------------------------------------
[Unit]
Description=PulseAudio Sound System
After=syslog.target local-fs.target
[Service]
Restart=on-failure
ExecStart=/usr/bin/pulseaudio --system --load="module-udev-detect"
TimeoutStopSec=1s
RestartSec=2
StartLimitInterval=60
StartLimitBurst=10
[Install]
WantedBy=multi-user.target
-----------------------------------------------------------------------
No magic except pa. 
Kind Regards