I hava amp+. My os is raspbian. There is also alsa installed. I devel python app where I can control also sounds. Also volume control is ok.
But i can also control volume from raspbian gui. So if i set in gui volume to 30% only... I can set 100% in my app it is still silent.
I would like to control sound volume only from my application. Not from raspbian gui. How to do it?