I have the MusicPad Pro which is made by FreeHand Music Systems.On the FreeHand Music site they sell digital sheet music which you can buy and download into the MusicPad Pro.Most of the music that is on their site is in a format called Solero. The neat thing about that format is that the sheet music can be transposed and apparently have a MIDI file encrypted so that one can hear how the piece should sound and of course one can slow or speed up the tempo as well.It would be cool to have someway of converting Not files to Solero format but I realize this may not be so easy!