$ vi ~/.asoundrc
pcm.!default {
	#type hw
	#card 0
	type plug
	slave.pcm "hw:0,0"
}
ctl.!default {
	type hw
	card 0
}

$ ls -la /dev/snd
合計 0
drwxr-xr-x   3 root root      220  1月  7 15:41 .
drwxr-xr-x  15 root root     3560  1月  7 15:41 ..
drwxr-xr-x   2 root root       80  1月  7 15:41 by-path
crw-rw----+  1 root audio 116,  0  1月  7 15:41 controlC0
crw-rw----+  1 root audio 116, 32  1月  7 15:41 controlC1
crw-rw----+  1 root audio 116, 16  1月  7 15:41 pcmC0D0p
crw-rw----+  1 root audio 116, 17  1月  7 15:41 pcmC0D1p
crw-rw----+  1 root audio 116, 18  1月  7 15:41 pcmC0D2p
crw-rw----+  1 root audio 116, 48  1月  7 15:41 pcmC1D0p
crw-rw----+  1 root audio 116,  1  1月  7 15:41 seq
crw-rw----+  1 root audio 116, 33  1月  7 15:41 timer

<music>
  +--<classic>
  |     +--<LiseDeLaSalle>
  |     |     +--<Bach>
  |     |     |     +-- 01_BWV903_Fantasie.mp3
  |     |     |     +-- 02_BWV903_Fuge.mp3
  |     |     |     +-- 03_BWV659.mp3
  |     |     |     +--....
  |     |     +--<Rachmaninov&Ravel>
  |     |     +--....
  |     +--<Rubinstein>
  |     +--....
  +--<jazz>
  +--<tango>
  +--....
  +--<favorite>

 left or right    seek backward/forward 10 seconds
 down or up       seek backward/forward  1 minute
 pgdown or pgup   seek backward/forward 10 minutes
 < or >           step backward/forward in playlist
 p or SPACE       pause movie (press any key to continue)
 ENTER            go forward in the playlist, even over the end.
 q or ESC         stop playing and quit program
 / and *          Decrease/increase volume.
 9 and 0          Decrease/increase volume.
 m                Mute sound.

$ sudo nano /etc/asound.conf
pcm.!default  {
 type hw card 0
}
ctl.!default {
 type hw card 0
}