I´ve just gotten my CP4, and I´m very happy with this investment. I´m truly an amateur and spend most of the time just practising playing. Doing this I enjoy the Notestar app on my Ipad. What other Ipad apps is compatible/possible to use with the CP4? I eventuelly would like to explore all kinds of possibilities with the instrument (MIDI, recording, rearranging material on the piano etc.). I´ve visited the Yamaha download page, and get the impression that there aren´t many apps for the CP4. I´m also interested in hearing about good PC software. I´m sorry I can´t be more specific. Just sant to know what´s out there and where to start looking.