Welcome! You found a CS First Starter Project for the Music & Sound theme. Watch this video at CS First to learn how to build it: https://csfirst.withgoogle.com/c/cs-first/en/music-and-sound/musical-art/become-a-music-maker.html If you're a teacher: Lesson plans are also available on the CS First site. If you decide to sign up for a CS First account, you'll be able to track your students' progress, order physical materials (kits), and access your students' projects in Scratch.
Thanks to my scratch teacher for help by playing a video on how to make a remix of the musical Art Starter Project. Don´t turn your volume up to high or you will not like this, or you can turn this up if you want to hear the lowest note.