Double-click the green flag. Brief explanation of how it works: Each song is a costume of pixels that represent notes (x axis is pitch, y axis is time). Another sprite scans the song sprite to encode the costume into a list of notes. That same sprite then goes through the list over time, creating clones with a 'Pitch' variable that tells clones where to fall and what note to make.
Credit to Hobson-TV for original project. Piano Visualiser Plus is the updated version of Piano Visualiser that allows you to switch songs and change speed (tempo) To switch songs, press space then restart the project To change tempo, use left and right arrow keys.