Mailing List Archive: Audio through both HDMI outputs?

Audio through both HDMI outputs?

May 1, 2021, 5:02 AM

Post #1 of 3 (225 views)

Hello,

Does anyone know anything about how to check audio through Nvidia HDMI outputs?

My regular audio is through the motherboard output, and I also have a
USB soundcard that I regularly use without trouble, but my HDMI is a
different matter.

I have a GTX 1080 card with two HDMI outputs, the first connected to
my main monitor, and the second connected to a TV. I've managed to
play sound through my monitor with aplay, but no luck with the TV.

aplay reports:
$ aplay -l
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
card 1: NVidia [HDA NVidia], device 9: HDMI 3 [HDMI 3]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 10: HDMI 4 [HDMI 4]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 11: HDMI 5 [HDMI 5]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 12: HDMI 6 [HDMI 6]
Subdevices: 1/1
Subdevice #0: subdevice #0

To get sound through the monitor:
aplay -D plughw:1,7 sample.wav

No luck on any of the other 6 devices reported. I suspect there might
be a setting somewhere on the Nvidia side that limits sound output to
one of these, and if that is so, I'd rather have the TV able to get
sound, as my computer have separate speakers and no need for the HDMI
sound output.

Any ideas for troubleshooting this welcome.

Regards,
Arve

Re: Audio through both HDMI outputs? [ In reply to ]

markknecht at gmail

May 1, 2021, 6:36 AM

Post #2 of 3 (225 views)

Permalink

On Sat, May 1, 2021 at 5:03 AM Arve Barsnes <arve.barsnes@gmail.com> wrote:
>
> Hello,
>
> Does anyone know anything about how to check audio through Nvidia HDMI
outputs?
>
> My regular audio is through the motherboard output, and I also have a
> USB soundcard that I regularly use without trouble, but my HDMI is a
> different matter.
>
> I have a GTX 1080 card with two HDMI outputs, the first connected to
> my main monitor, and the second connected to a TV. I've managed to
> play sound through my monitor with aplay, but no luck with the TV.
>
> aplay reports:
> $ aplay -l
> 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
> card 1: NVidia [HDA NVidia], device 9: HDMI 3 [HDMI 3]
> Subdevices: 1/1
> Subdevice #0: subdevice #0
> card 1: NVidia [HDA NVidia], device 10: HDMI 4 [HDMI 4]
> Subdevices: 1/1
> Subdevice #0: subdevice #0
> card 1: NVidia [HDA NVidia], device 11: HDMI 5 [HDMI 5]
> Subdevices: 1/1
> Subdevice #0: subdevice #0
> card 1: NVidia [HDA NVidia], device 12: HDMI 6 [HDMI 6]
> Subdevices: 1/1
> Subdevice #0: subdevice #0
>
> To get sound through the monitor:
> aplay -D plughw:1,7 sample.wav
>
> No luck on any of the other 6 devices reported. I suspect there might
> be a setting somewhere on the Nvidia side that limits sound output to
> one of these, and if that is so, I'd rather have the TV able to get
> sound, as my computer have separate speakers and no need for the HDMI
> sound output.
>
> Any ideas for troubleshooting this welcome.
>
> Regards,
> Arve

As posed I don't know that the question is answerable. You don't state
what desktop environment you are using. If it happens to be KDE
then you will likely need to dig into pulseaudio through the System
Settings GUI which could be the controlling feature in that
environment.

Any other desktop environment I have no experience these days.

Good luck,
Mark

Re: Audio through both HDMI outputs? [ In reply to ]

arve.barsnes at gmail

May 1, 2021, 6:41 AM

Post #3 of 3 (225 views)

Permalink

On Sat, 1 May 2021 at 15:36, Mark Knecht <markknecht@gmail.com> wrote:
> As posed I don't know that the question is answerable. You don't state
> what desktop environment you are using. If it happens to be KDE
> then you will likely need to dig into pulseaudio through the System
> Settings GUI which could be the controlling feature in that
> environment.

I don't run any desktop environment. I'm running openbox on this
computer, and I don't think it has any potential to control sound. I
also don't have pulseaudio installed.

Regards,
Arve