What ?
Yes !
I searched for a volume pedal, but the usual pedals are stealing attention on stage and are unreproducable (for me).
Here´s my approach using a ATTINY84, 2 momentary switches, a few LED and a 10kOhm digital potentiometer.
I programmed 5 values for the digital Pot : 0%, 25%, 50%, 75% and 100%.
At the Toaster I set Volume Pedal Range to +4, so I get nice small, but effective volume steps.
Works like charm.