Raspberry Pi image install: Picroft_Buster-Keaton_2020-01-10.zip
Mycroft responds on the command line to the microphone, so that works OK. I can run mpg123 with a radio stream, no problem. No sound from Mycroft. To be sure, I ran:
pactl list short sinks
and from that list I ran:
pactl set-default-sink 0
(0 being the appropriate USB sound card option). mpg123 still working. Tried a reboot, still not a peep from Mycroft, no ding, no nothing.
Any suggestions of what to pursue next, please!