Tell us what’s happening:
hello I have been working on the drum machine, so far I see that everything is working properly but for some reason is not passing 4,5 and 6.
The first is just the letter casing of the ids I think (should be uppercase).
As for the keyboard part, that doesn’t seem to be working as intended. Try pressing the keys without first clicking the buttons (i.e. giving focus). Edit: one option is to just add a keypress event listener to the document instead.