i´m using two amps together one for edgy distortion+effects and one with a clean bassy sound. the problem: on some songs i want to have just a little bit of the "driveamp" and on others a little of the clean one. sometimes both blasting with equal level. i know i could use two volume pedals/one for each amp but i am wondering if there is a device that can do all of this. for the moment i´m turning up/down the volume on each amp during rehearsals, but i don´t want to do so on stage. i have been using an A/B-box, but found out that i often wanted some bottom when the drive amp was on and that it sounded great to sometimes sneak in just a little bit of tube-grind to my clean sound. any advises?