$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: Generic_1 [HD-Audio Generic], device 3: HDMI 0 [SAMSUNG]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: Generic_1 [HD-Audio Generic], device 7: HDMI 1 [HDMI 1]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: Generic_1 [HD-Audio Generic], device 8: HDMI 2 [HDMI 2]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: Generic_1 [HD-Audio Generic], device 9: HDMI 3 [HDMI 3]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 3: Device [USB Audio Device], device 0: USB Audio [USB Audio]
Subdevices: 1/1
Subdevice #0: subdevice #0
Dla karty pierwszej od góry plik wygląda tak:
defaults.pcm.card 0
defaults.pcm.device 3
defaults.ctl.card 1