I've seen other posts on this forum regarding the HiFiBerry Digi+ board and RPi3B running runeaudio.
I edited the /boot/config.txt file to remove the comment in front of the line for the digi+ and rebooted but it still does not appear as a choice from the MPD audio output interface.
I used dmesg to dump the logs and found the following:
5.585383] snd-hifiberry-digi sound: ASoC: CPU DAI (null) not registered
[ 5.585395] snd-hifiberry-digi sound: snd_soc_register_card() failed: -517
It looks like the Digi+ Pro board is not being recognized/found?
I sent a support email to hifiberry and am currently downloading their version of raspian to see if it will find the digi+ Pro board.
Any other suggestions? Is this anything to do with ALSA?
Any and all help is greatly appreciated - I am so close to getting my system working and would love to get it playing!
Thanks and regards,
Steve