pulseaudio device missing
From thelinuxwiki
problem
USB sound device unusable and not found by pulseaudio.
$ pactl list | grep -A 1 "Card #" ~ Card #0 Name: alsa_card.pci-0000_01_00.1 -- Card #1 Name: alsa_card.pci-0000_00_1b.0
solution
restart pulseaudio