Is there any way to assign cc7 or volume to a volume pedal of the master keyboard to control master volume ?
Yes of course !
First plug your volume pedal into your master keyboard.
go on the OPTIONS, CONTROLLERS screen, then clik on the MASTER VOLUME line (mixer section)
then move your pedal.
DONE.
if nothing happen, you should enable your pedal to send midi controller into your midi keyboard options.
I personnaly use one of the slider for the master volume.
Let me know
Dan
Yes of coarse, I forgot you have to assign it. It works great. Thanks