Markus built a DIY music box from some old speakers and a PIC32 microcontroller. The uC generates the sound, and the amplifier that’s integrated into the speakers amplifies it.
being inspired by another project of ChaN I decided to build my own music box. The theory is described in detail on ChaN’s page, so I won’t repeat it here. Instead of an ATtiny, mine uses a PIC32 and has therefore enough processing power to play up to 64 notes simultaneously
Via the forum.
Check out the video after the break.