Comment 9 for bug 1598309

@Ads20000, devmode won't help because /usr/share/alsa/alsa.conf isn't in the core snap. See https://bugs.launchpad.net/ubuntu/+source/snapd/+bug/1598309/comments/5 for what you need to do to make ALSA look in the right place for its configuration.

I think someone may have been working on a snapcraft part to make this easier for people. Perhaps file a new bug about making it easier to use ALSA and/or ask on the mailing list/rocket/irc on the status of that work?