Udev and Pulse

ThisTo is about usinguse a USB DAC (digital-analog audio converter) in Sailfish OS.OS Itit is annecessary externalto set up udev to respond to the device thatbeing records analog signals via USB, often usedplugged in music production and art.turn off the internal sound card.

You need to become root:

# devel-su #echo// root
# echo 'ATTRS{id}=="mtsndcard", ENV{PULSE_IGNORE}="1"' > /etc/udev/rules.d/89-pulseaudio-usb.rules
# cd /etc/pulse/xpolicy.conf.d
# mv usbaudio.conf.disabled usbaudio.conf
# exit // back to user
# pactl load-module module-udev-detect

 

 

 

 

The last command should be done at system boot through pulse. Sadly none of the following work:work and you need to execute that pactl load command after reboot.

 edit .config/pulse/default.pa 

.include /etc/pulse/default.pa
load-module module-udev-detect

 

edit /home/defaultuser/.config/systemd/user/pulse_udev.service

[Unit]
Description=udev-pactl-start-usb-dac

[Service]
Type=oneshot
RemainAfterExit=no
ExecStart=/usr/bin/pactl load-module module-udev-detect

[Install]
WantedBy=multi-user.target

Then run
systemctl --user enable pulse_udev.service

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