nemo@ithaka:~$ sudo aplay /usr/share/sounds/alsa/Front_Center.wav
Home directory not accessible: Permission denied
ALSA lib pcm_dmix.c:1024:(snd_pcm_dmix_open) unable to open slave
aplay: main:722: audio open error: Device or resource busy
nemo@ithaka:~$ sudo aplay -l
**** List of PLAYBACK Hardware Devices ****
Home directory not accessible: Permission denied
card 0: PCH [HDA Intel PCH], device 0: 92HD91BXX Analog [92HD91BXX Analog]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0