On 2020-02-19 19:49, Mick wrote:
On Wednesday, 19 February 2020 17:32:46 GMT n952162 wrote:
On 2020-02-19 15:37, n952162 wrote:
On 2020-02-19 10:48, Adam Carter wrote:
On Wed, Feb 19, 2020 at 8:06 PM <n952...@web.de
<mailto:n952...@web.de>> wrote:
I can't play audio from my VBox. The host system only plays
audio through the second sound card (1). The VBox offers me OSS
or the null driver. The Alsa and pulseaudio pages say OSS is
"deprecated". Is Oracle out of the picture? I can't find the
straight dope.
Do I have to convince VBox to talk to a different sound card?
Which vbox version and what are your use flags?
FWIW, for me;
app-emulation/virtualbox-6.1.2::gentoo was built with the following:
USE="alsa opengl opus pam pulseaudio qt5 sdk udev -debug -doc -dtrace
-headless -java -libressl -lvm -pax_kernel -python -vboxwebsrv -vnc"
ABI_X86="(64)" PYTHON_SINGLE_TARGET="python3_6 -python2_7 -python3_7
-python3_8" PYTHON_TARGETS="python2_7 python3_6 -python3_7 -python3_8"
So i can use ALSA or pulse.
Okay, that's a good tip. I'll try those use flags - I have none set.
I'm at virtualbox-5.2.32, which I just emerged in the last couple of
days, using this profile:
[16] default/linux/amd64/17.1 (stable) *
I added alsa and pulseaudio and it didn't help. Then I noticed that
opus has something to do with the soundcard so I emerged that with -vU
but nothing needed to be done.
It seems like VBox is interfacing directly with "the" sound card and
even working correctly (e.g. aplay some-file takes about the right
amount of time until it ends error-free), but unfortunately, I have 2
sound cards and the first doesn't work.
Perhaps I could map the one to the other soundcard using .asoundrc?
Unfortunately, I can find no grammar for that file.
Two outputs, one HDMI, the other analogue on this laptop:
$ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: HDMI [HDA ATI HDMI], device 3: Generic Digital [Generic Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: Generic [HD-Audio Generic], device 0: CX20757 Analog [CX20757 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
This syntax swaps them over, so I can get sound out of the speakers:
$ cat /etc/asound.conf
#pcm_slave.slave_rate48000Hz {
# pcm "hw:1,0"
## This is the rate the sound card does.
## Any random input rates are resampled to this.
# rate 48000
#}
#pcm.rate44100Hz {
# type plug
# slave slave_rate48000Hz
#}
defaults.pcm.card 1
defaults.pcm.device 0
defaults.ctl.card 1
Perhaps coincidentally, that's almost identical to what I have on the host:
01~>cat .asoundrc
defaults.pcm.!card 1
defaults.pcm.!device 0
defaults.pcm.!ctl 1
#pcm.!default {
# type hw
# card 1
#}
#ctl.!default {
# type hw
# card 1
#}
That works fine there, but aplay in the guest vbox is silent.
But that gave me an idea - I tried deleting the host .asoundrc - but it
didn't help
Putting that .asoundrc in the guest won't work, because vbox only
reports seeing one sound card - there is no card 1 (i.e. second card).
The documentation that I could find about .asoundrc implies that you can
do things like mapping channels but I'm not succeeding with that.
