Press-a-s-d-f-g-h-j-k to play the white keys. Press- w-e-t-y-u to play the black keys. To change the instrument into an other type, just slide the instrument variable. The volume is set to 100% (normal volume setting for Scratch) when you click the green flag. You can change the volume variable to your liking if you want to.
There are only twenty different instruments due to the fact that the instrument variable can't handle all that 100+ instruments in the coding. ROBORO1: https://scratch.mit.edu/users/ROBOR1/ 1Geronimo: https://scratch.mit.edu/search/projects?q=1geronimo
