Re: tee-like function via virtual_oss

From: J P <webplication_at_gmail.com>
Date: Wed, 6 Oct 2021 10:12:16 +0200
Hi,
no chance so far, just to be sure I got you right:

   1. /dev/dsp0.9 created when basename_clone = 1
   2. virtual oss started with

-T /dev/sndstat -C 2 -c 2 -r 48000 -b 24 -s 8.0ms -R /dev/null *-P
/dev/dsp0 -d dsp0.9* -M x,0,0,0,0,0 -M x,1,1,0,0,0 -t dsp.ctl -i 10 -S

Still nothing when capturing.

Environment: trying to grab audio from Firefox under KDE.

Firefox is compiled with PULSEAUDIO on.

When I enable virtual_oss and then start KDE there are no devices and the
mixer does not work, so I cannot set the default playback device nor assign
another playback device to Firefox when it outputs audio. It relays on
hw.snd.default_unit (which happens to be set to 0).

Furthermore when virtual_oss is started other apps behave inconsistently:
vlc only shows the virtual_oss device in the list of output devices, all
the other are gone, but audacity correctly shows the other rec devices as
well as virtual_oss.

What am I doing wrong?

Thank you.

El lun, 4 oct 2021 a las 12:38, J P (<webplication_at_gmail.com>) escribió:

> Thank you for your email.
>
> I think the use-case I am facing is different: the player is using
> /dev/dsp0.something, I have no control over it.
>
> Furthermore, since I installed virtual_oss all the audio devices have gone
> from PulseAudio, which is a little odd. On top of this, /dev/ is being
> populated with a lot of /dev/dsp0.x (now I have 14) and the number grows
> the more I use audio.
>
> Can my goal be achieved with virtual_oss or would you suggest some other
> tool?
>
> Thank you.
>
>
>
> El lun, 4 oct 2021 a las 9:21, Hans Petter Selasky (<hps_at_selasky.org>)
> escribió:
>
>> Hi,
>>
>> On 10/3/21 11:33 PM, J P wrote:
>> > Hi,
>> > thank you.
>> >
>> > It does not seems to work. I get all null samples when recording.
>> >
>>
>> Which dsp device are you recording from?
>>
>> > Maybe it's a matter of gain? How do I control gain with virtual_oss?
>>
>> You can install virtual_oss_ctl to control the gain.
>>
>> I tested with SOX from ports and it works fine here:
>>
>> env AUDIODEV=/dev/dsp9 play somefile.wav &
>>
>> env AUDIODEV=/dev/dsp9 rec somerecording.wav
>>
>> --HPS
>>
>
Received on Wed Oct 06 2021 - 08:12:16 UTC

Original text of this message