Master volume with alsaeq

Hi,

I´am using the alsaeq with my HifiBerry AMP+ (as described in the guide https://support.hifiberry.com/hc/en-us/articles/205311292-Adding-equalization-using-alsaeq) and with the command "alsamixer" I see all the different volume controls for the different frequencies.

But is it possible to have a master volume control as it is available without the alsamixer?

Cheers

Martin