On Tue, 17 Mar 2020 at 20:10, datenwolf <foobar@datenwolf.net
<mailto:foobar@datenwolf.net>> wrote:
Hi,
I'm currently struggling with the "new" (I guess it's been a few years,
but so far I've never needed them) way to specify audio device
emulation.
The TL;DR of the task at hand I want to solve is: I want to make qemu
use a snd-aloop device (let this be card 3) in a duplex configuration.
In my case that would be card 3, device 0, subdevice 0, so in ALSA terms
hw:3,0,0 – however this uses commas, which are already a separator for
the suboptions of the -audiodev options.
Even after reading the documentation for the 7th time or so, I still
struggle to understand how some of the parameters fit together. When
using the following command line
qemu-system-x86_64 \
-enable-kvm \
-smp 2 \
-m 2G \
-usbdevice tablet \
-audiodev alsa,id=alsa,in.dev <http://in.dev>=hw:3,out.dev
<http://out.dev>=hw:3 \
-soundhw hda \
...
I'm told on stderr that
> audio: Device hda: audiodev default parameter is deprecated,
> please specify audiodev=alsa
If I then try `-audiodev=alsa` this is taken as an invalid option.
The slightly longer version of my problem statement is, that I'd like to
connect qemu to a running JACK audio instance.
Unfortunately when used with qemu that ALSA plugin fails to connect to
the JACK server, using the following command line
qemu-system-x86_64 \
-enable-kvm \
-smp 2 \
-m 2G \
-usbdevice tablet \
-audiodev alsa,id=alsa,in.dev <http://in.dev>=jack,out.dev
<http://out.dev>=jack \
-soundhw hda \
...
it fails with the following diagnostic output.
> cannot connect system:capture_1 to alsa-jack.jackC.24006.70:in_000
> alsa: Could not initialize ADC
> alsa: Failed to apply audio parameters
> alsa: Reason: Input/output error
> alsa: Could not initialize ADC
> alsa: Failed to set format 2
> alsa: Reason: Invalid argument
So this is somewhat a XY question: I want to connect it to JACK and
think that I might be able to make this work though snd-aloop, but so
far without success.
Hi,
Did you get any solution to this? I hit a similar thing as reportedly
use jack directly, if I spin a vm with an ich9-hda I see the following
output:
jack: JACK output configured for 48000Hz (1024 samples)
jack: JACK input configured for 48000Hz (1024 samples)
However, the vm doesn't produce any sound in the host, so
if I run, for instance the speaker test in a plasma desktop I hear
nothing. My audio bits from qemu:
-device ich9-intel-hda -device hda-duplex
The machine is a q35 one.
Thanks!
Jose.