The Pentatonic Scale has only 5 notes to an 'octave' instead of the 8 we're used to. But the Pentatonic Scale is used world-wide so you'll recognize it right away. *** Play the A-J keys of your keyboard. Choose your instrument by clicking at the top. You can also set the volume. You're playing the black keys on the piano keyboard onscreen, and whatever notes you play light up. *** (Two extra notes are included here so you can get a whole octave and enough notes to play tunes you'll enjoy.) *** Hope you have fun with this. If you download it you can choose even more instruments and make any other changes you'd like. -- Larry828 8/1/09