[alsa-devel] Softvol only after device has opened

[Ricard Wanderlof]

On Tue, 9 Jun 2015, Clemens Ladisch wrote:

> Ricard Wanderlof wrote:
> > What I was getting at was that although I can't do:
> >
> > $ amixer sset Capture 192
> >
> > if Capture is defined by the softvol plugin, and I haven't opened the
> > device prior to running amixer, however
> >
> > $ alsactl restore 0:
> >
> > works, assuming that I've saved the settings previously, even before the
> > device is opened. I can understand that this is very useful and desired,
> > but given that the underlying control does not yet exist, it puzzles me
> > that it actually works.
> 
> Have a look at /var/lib/asound.state.  "alsactl store" marks any user-
> space controls; when "alsactl restore" sees this flag, it will explicitly
> recreate the control.

And there is no other way to recreate the control using an application 
than to use alsactl then?

/Ricard
-- 
Ricard Wolf Wanderlöf                           ricardw(at)axis.com
Axis Communications AB, Lund, Sweden            www.axis.com
Phone +46 46 272 2016                           Fax +46 46 13 61 30