USER        PID ACCESS COMMAND
/dev/snd/controlC0:  huang      2497 F.... pulseaudio
/dev/snd/controlC1:  gdm        1633 F.... pulseaudio
                     huang      2497 F.... pulseaudio
/dev/snd/controlC2:  gdm        1633 F.... pulseaudio
                     huang      2497 F.... pulseaudio