Build a Wearable Synthesizer System
You can build a physically simulated piano synthesizer that can play a variety of keys. Using a microcontroller and some basic electronic components, you can create gloves to interface with this synthesizer, so you can play the piano without the keys.
Microcontroller Technology Microchip Technology Schmitt Trigger Schmitt Triggers Accuracy Piano String Modeling Physical Audio Signal Processing
Source: circuitcellar.com