My moon harp is tuned to a pentatonic, or five note scale: D-E-G-A-B. Basically what that means is there are no wrong, or dissonant, notes. While it is pleasing to the ear, it does limit the type of songs that it can be used to accompany. Most rounds will work and some simple nursery songs will too. Or use it just use it for strumming and setting a calming mood.