Add the ability to retrieve control, similar to: `amixer -D hw:1 scontrols`

[charlesomer]

Hi,

I'm not sure if this would be possible or already exists (I don't think it does) but it would be great if it was possible to get the control for a device similar to amixer -D hw:1 scontrols. At the moment I am extracting the string which isn't elegant but does work for now.

Thank you Charles

[RonaldAJ]

You can have a look whether the function called from amixer can be made available in pyalsaaudio. I have no experience with the mixer side, but extending the sound acquisition side was doable.

There are a few pitfalls related to memory management when extending pyalsaaudio functionality. But all in all it is not extremely hard, just takes some time.

[ossilator]

isn't the request just asking for an enumeration of controls? that's what alsaaudio.mixers() is supposed to do.