My project involves creating an arduino midi controller that corresponds each note to a different servo or stepper motor, causing it to rotate a fixed angle. However, the difficulty I'm facing is that I want to ultimately cover 30 different notes, so I need to control 30 motors at once. From the research I've done so far (I am very much a novice), I doubt that I can make this work with one arduino, so any suggestions would be appreciated. Thanks.
EDIT (further explanation):
I want to place the motor (attached to a rubber or foam wheel) at the front of a row of rubber balls on a slope, and act essentially as a dispenser, so that it holds the balls back when motionless, and can rotate a certain angle to dispense a ball when signaled (I don't need it to generate a lot of force, but I'd like it to dispense fairly quickly). My only concern with servos is that I have not seen any servo with an axle to attach a wheel to. Other than that, I'm open to either servos or steppers, whichever would simplify the circuitry and electronics needed.
I've considered using the servo horn as an open/close dispenser instead, but I think that the balls would not roll forward fast enough (or at all, maybe, with rubber) if I don't use a wheel to push each ball forward away from the balls behind. I'll know for sure after I've tested this, but I'm betting that using the servo horn won't work.