Make a smooth transition from one note to another has importance in Indian classical music. Many continuous instruments like the violin, flute is well suitable for the same. I tried to make a similar thing possible using Arduino.

Sample testing of it shown in the below video.
https://www.youtube.com/watch?v=7dZatrW8Ex8

It makes use of the Capacitance touch library. it continuously scans the surface and detects the location of the touch. The Midi massage is sent to PC where the sound is synthesized using FL studio. this project makes use of Arduino Mega. There is a major problem of delay. it takes in total 120 ms from touch to sound generation. which is very slow, so it can only be used for very slow rhythms.