Hi,
I am playing with virtual balanced inputs
https://www.diyaudio.com/forums/pc-based/326747-virtual-balanced-regular-soundcard-linux-results.html
. For proper functionality it needs a regular recalibration of the
ttable multiplication coefficients of route plugin in .asoundrc.
The audio stack is alsa -> wine -> Arta measurement software. When I
stop measuring in arta (without exiting the software), the soundcard
gets closed - confirmed in /proc/asound/.../hw_params. Now I change the
ttable coeffs. After re-opening the device (continuing with measurement
in the running arta instance) the changes in .asoundrc are ignored. I
have to restart the arta application for the changes to take effect.
When I run e.g. aplay inbetween, it accepts the changes right away. Upon
continuing in arta, the original ttable coeffs are still loaded for this
instance.
I understand it is the way wine handles the device somewhere in
https://github.com/wine-mirror/wine/blob/master/dlls/winealsa.drv/mmdevdrv.c
.
Please when is the alsa-lib config loaded by the library/application? Is
there any way to force a config reload from outside?
Would e.g. calling snd_config_update before snd_pcm_open on line
https://github.com/wine-mirror/wine/blob/master/dlls/winealsa.drv/mmdevdrv.c#L827
help? If so, what overhead does it impose? Perhaps I could ask the
wine guys to consider such change if it worked and required minimum
overhead.
I very much appreciate any help.
Best regards,
Pavel.
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