Sound has been hit-or-miss - and I'm not entirely sure why. It may have something to do with the alsa ucm-config files - you can try pulling in these files -
https://chromium.googlesource.com/ch...nfig/DAISY-I2S but be warned that you MAY blow your speakers, or other bad things may happen.
They would go into /usr/share/alsa/ucm-config/DAISY-I2S - but iirc, they should be identical to what is already there - or it could be possible that the alsa bits that enable that aren't installed by default in the image.