Turn Raspberry Pi into Piano! Check out Pimoroni Piano HAT – you can control hardware synthesizers and software synths or play some really beautiful music in Python. This HAT comes with 16 touch sensitive buttons, up and down octave controls, and 13 piano keys from C to shining C! Each button on Piano HAT can be individually watched in Python and hooked up to whatever mad-cap contraption or project you can imagine.
The Piano HAT is compatible with Raspberry Pi 2, B+ and A+ and comes fully assembled.
Learn more or buy Pimoroni Piano HAT from Pakronics: