I think these came in two colors with two different sets of functions. Black and white I believe. I'm sure there's been a thread on it before. I grabbed one(white) from a junkyard and modified it to only buzz for the lights(with door open). But yes, the sound is grating and music would definitely be preferred, but then I might just leave it playing!
Rob
Eddy Myrtle '84 F150 300-6, Offenhauser C series intake, Edelbrock 1404(500cfm manual choke), EFI exhaust manifold, HEI dizzy, custom Painless harness, NP 435, NP 208, D44, 8.8"/3.08, 1.5" leveling coils, 265/75/16 tires.
Toyopet (Daily driver) '86 Toyota Pickup