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Having read What do ALSA devices like "hw:0,0" mean? How do I figure out which to use? I'm only more confused.

When I execute on my system:

$ aplay -l

I get:

**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC887-VD Analog [ALC887-VD Analog]
  Subdevices: 0/1
  Subdevice #0: subdevice #0
card 0: PCH [HDA Intel PCH], device 1: ALC887-VD Digital [ALC887-VD Digital]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 8: HDMI 2 [HDMI 2]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

This is just a pretty standard desktop. It has (lspci):

00:1f.3 Audio device: Intel Corporation Device a2f0

and:

01:00.1 Audio device: NVIDIA Corporation GK208 HDMI/DP Audio Controller (rev a1)

So I have two audio devices. That seems to be about right, since aplay lists card 0 and card 1.

I can even understand that there is one analog and one digital device on card 0, but what is the difference between device 3, 7, and 8 on card 1?

AttributedTensorField
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1 Answers1

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HDMI port can transfer audio. It looks like you graphic card has 3 HDMI port, hence 3 devices on card 1(Nvidia card).

Nicolas
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