From GameBrew - a wiki dedicated to Video Game Homebrew.
MyPiano is a piano application that vertualize a 61 note piano. It can play 5 octaves of notes (61) and can be used on the go for piano playing.
It was submitted to NEO Spring Coding Compo 2009, ranked 9th in APP section.
Down/Left/Up/Right - C/D/E/F
B/Y/X/A - G/A/B/High C
Hold L (while playing a note) - Play the flat of that note
Hold R (while playing a note) - Play the sharp of that note
Hold L+R - Move the octave up by one
Hold R+L - Move the octave down by one
Octave buttons - Automatically move to an octave
Start - Octave -1
Select - Octave +1
DS Motion card - Octave -1 (tilt left), Octave +1 (tile right)