In this instructable, working and making of Arduino based piano is explained. This piano is able to play any frequency in-between two keys. Making of this would require basic knowledge of Arduino for debugging.
Each Monday is ArduinoMonday here at Adafruit! Be sure to check out our posts, tutorials and new Arduino related products. Adafruit manufactures the Arduino right here in the United States in cooperation with arduino.cc. We have a huge selection of Arduino accessories and all the code and tutorials to get you up and running in no time!