From GameBrew - a wiki dedicated to Video Game Homebrew.
A homebrew to play the piano on DS.
It was submitted to the Wild Demo competition at Blockparty 2009 and in the 2nd place.
It has 5 sound modes and 7 ways to make the tone sound to adjust from.
There is also a mode of play, if playing the wrong note, for 2 second the note will not be played.
Stylus - different actions D-pad - modify notes
Tested on: Original R4 Flash Cart with firmware 1.17