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 <[email protected] > >> > >> <mailto:[email protected]>> 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
--
Regards,
Mick
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