The main editing format is text based. The program also has the possibility to fetch an externally served collection of playable songs via its built in database. The program does not contain a software synthesizer. To get the best experience buy a MIDI or USB adapter that works with your MIDI capable Piano/Keyboard, from the Apple Store. Ensure that you enable the "Local Keys Off" feature in your instrument before using this program. Else the output will not be as expected. Connect to the instrument before starting the program.