$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: hdadsp [hda-dsp], device 7: Analog HDA DSP (*) []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: hdadsp [hda-dsp], device 8: Digital HDA DSP (*) []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: hdadsp [hda-dsp], device 9: Alt Analog HDA DSP (*) []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: hdadsp [hda-dsp], device 10: HDA DSP HDMI1 (*) []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: hdadsp [hda-dsp], device 11: HDA DSP HDMI2 (*) []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: hdadsp [hda-dsp], device 12: HDA DSP HDMI3 (*) []
  Subdevices: 1/1
  Subdevice #0: subdevice #0




$ pactl list cards

(does not return anything)


$ pactl list sources
Source #0
	State: SUSPENDED
	Name: auto_null.monitor
	Description: Monitor of Dummy Output
	Driver: module-null-sink.c
	Sample Specification: s16le 2ch 44100Hz
	Channel Map: front-left,front-right
	Owner Module: 13
	Mute: no
	Volume: front-left: 65536 / 100% / 0.00 dB,   front-right: 65536 / 100% / 0.00 dB
	        balance 0.00
	Base Volume: 65536 / 100% / 0.00 dB
	Monitor of Sink: auto_null
	Latency: 0 usec, configured 0 usec
	Flags: DECIBEL_VOLUME LATENCY 
	Properties:
		device.description = "Monitor of Dummy Output"
		device.class = "monitor"
		device.icon_name = "audio-input-microphone"
	Formats:
		pcm




$ pactl list sinks
Sink #0
	State: SUSPENDED
	Name: auto_null
	Description: Dummy Output
	Driver: module-null-sink.c
	Sample Specification: s16le 2ch 44100Hz
	Channel Map: front-left,front-right
	Owner Module: 13
	Mute: no
	Volume: front-left: 65536 / 100% / 0.00 dB,   front-right: 65536 / 100% / 0.00 dB
	        balance 0.00
	Base Volume: 65536 / 100% / 0.00 dB
	Monitor Source: auto_null.monitor
	Latency: 0 usec, configured 0 usec
	Flags: DECIBEL_VOLUME LATENCY SET_FORMATS 
	Properties:
		device.description = "Dummy Output"
		device.class = "abstract"
		device.icon_name = "audio-card"
	Formats:
		pcm