If there is one skill I have with regards to music, it’s that I make can make some really annoying noises.
While driving home, I started thinking about what would be the most annoying musical instrument one could build. More specially, more or less “acoustic” instruments.
The ideas that came to mind were mostly about building wind instruments, and attaching a large number of them to a compressed air source. Kind of like a set of bagpipes, but far more annoying.
A large pressure chamber with say, three dozen slide whistles attached to it. All slightly out of tune. Or a large number of siren whistles. Or both. Maybe a few dozen cheap penny whistles. Or a hundred kazoos.
Something else to put on the list of things to build.
 and not including things that are just brutally loud, like a klaxon, or steam whistle, or a Hemi powered siren, or an orchestra of pulse jets, or maybe a fog horn.