Adding tone control to the Rebote 2.5 for more high-end roll-off?

[mueller]

Is there a way to add a pot to control the amount of high-end filtered after each repeat in the Rebote 2.5? ...I mean like the tone control on the Boss DD-20 if that didn't make sense...

I'd be decreasing the amount of treble to sound more analog, to use sort of like a reverb pedal.