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.
* Any parts and equipment will be paid for on top of the proposal cost, which should be purely for your labor.
* What should be delivered is schematics and PCB layouts.
* You are responsible for firmware for the microcontroller, the layout of the circuit and part selection, and PCB design.