I would like to make a simple midi, mini pipe organ but the first thing I thought of was the price of the solenoids. I'm guessing I would need about 40 individually moving "plugs." Would there be a way to do this without paying $6 per solenoid?(The cheapest I've seen them). Variability would be very good to have but not entirely necessary.
Maybe an alternative to solenoids more specialized for large arrays?