Hi

I'm trying to figure out how to manipulate Alsa mixer volumes like: MASTER, PCM, MIC, or so..

Some friend will design an usb device with four buttons, when somebody press any button he will send trough usb some message and I will have to up or down alsa mixer volume.

Can somebody point me in the right direction with some sample please?

In the meantime we can test using the mouse events like left button, right button or trackball.

Thanks a lot.