I have been struggling to get balena sound to work on my Raspberry Pi 3. I’ve finally got it to work and found the following were needed:
- you must use the 32-bit Raspberry Pi device (Raspberry Pi 3) not the 64-bit one
- obviously you must also use the 32-bit OS
- don’t use HDMI to monitor the Pi booting, as it will send the audio out over HDMI rather than the jack output.
- Alternatively, set the device configuration variable RESIN_HOST_CONFIG_hdmi_ignore_edid_audio to 1, as was pointed out in another post
Hope this helps!