alsamixer / amixer supported usb audio class 2 controls

I am currently developing a usb soundcard that is usb audio class 2 compliant. In my current setup I have audio and mute controls for several channels working in alsamixer. The USB audio class 2 spec also supports a lot of other controls such as bass, mid, treble, equalizers, effects, etc. I have been trying to find a list of controls supported by alsamixer but the documentation does not mention any specifics on what kind of controls are supported. If someone has a list with supported controls or an alternative command-line program that would be greatly appreciated.