Default audio device was disabled to not interfere with external sound devices (like USB sound cards). In order to reenable it you must edit two files below
1. /boot/config.txt
Remove or comment line (add # at the beginning of the line) "dtparam=audio=off"
2. /boot/config.txt
Add line "dtparam=audio=on"
3. /etc/modprobe.d/raspi-blacklist.conf
Remove line "blacklist snd_bcm2835"
To configure audio devices you can use PulseAudio Volume Control tool. The tool is available in Start Menu -> Sound & Video -> PulseAudio Volume Control. Also please be aware that OpenAuto requires microphone input to work properly.
1. /boot/config.txt
Remove or comment line (add # at the beginning of the line) "dtparam=audio=off"
2. /boot/config.txt
Add line "dtparam=audio=on"
3. /etc/modprobe.d/raspi-blacklist.conf
Remove line "blacklist snd_bcm2835"
To configure audio devices you can use PulseAudio Volume Control tool. The tool is available in Start Menu -> Sound & Video -> PulseAudio Volume Control. Also please be aware that OpenAuto requires microphone input to work properly.