simple idea but i haven't ever seen one.....
you are jamming along on loop "A", but when you push loop "B" your signal is routed to a different pedal or pedals.
the catch would be that loop "B" is a momentary button(that doesn't make noise when pushed) and disengages loop A. that way you can switch between A/B very fast or in rhythm/tempo to the music.
also the routing interior of the box would have to be so both loops have signal exiting on this pedals out. example:
signal in/ A loop/ B loop/ signal out.
or even more simple:
signal in loop B/ signal out(loop A)
you are jamming along on loop "A", but when you push loop "B" your signal is routed to a different pedal or pedals.
the catch would be that loop "B" is a momentary button(that doesn't make noise when pushed) and disengages loop A. that way you can switch between A/B very fast or in rhythm/tempo to the music.
also the routing interior of the box would have to be so both loops have signal exiting on this pedals out. example:
signal in/ A loop/ B loop/ signal out.
or even more simple:
signal in loop B/ signal out(loop A)