Yes…with the Un0 chip in the FCB1010 you can choose between “Stompbox” mode on or off. In “ON” the switch acts normally…on when you press it and off when pressed again. With “Stompbox” mode turned off the switch goes into a “momentary effect”…the switch stays on as long as you keep it pressed. When released the switch is now off.
In the above MIDI Monitor screen shot the first entry is the switch held down. The second entry is when the switch is released.
I have one switch set up as a sustain pedal and it works quite well. There’s no variance as in a normal sustain pedal (such as half pedal, etc.) but one doesn’t really notice this in most pop music. My other switches do all the other chores such as Rackspace up & down, Next & Prior Songs, Next & Prior Song Parts. Then, I have 2 expression pedals which work quite nicely for volume and wah, etc.
The Un0 comes with it’s own programming software that is fairly easy to use.