• Follow Lights: When this is selected, Song playback pauses, waiting for you to play the notes correctly. When you play the correct notes, Song playback continues. Follow Lights was developed for the Yamaha Clavinova series. This function is used for practicing purposes, with built-in lamps on the keyboard indicating the notes to be played. Even though the PSR-SX900/SX700 does not have these lamps, you can use the same function by following the indications in the displayed notation with the Song Score function.