Create an electronic instrument using an ARM MCU, with bluetooth, battery, and USB. Will be able to save songs played, and later transfer to a computer or phone. Will need to write MIDI synthesizer for the MCU. Parts and equipment will be paid for on top of the proposal cost, which should be purely for your labor. What is sought with this posting is purely a working prototype, any further work will be compensated separately. I am uncertain of the budget neccessary for labor, hence the high budget listed here.