Engine quit.

I don’t see how an alternator could make an engine quit. I assume there’s an annunciater light for the field circuit? Occasionally the combo switch/breaker on my alternator field trips and the light comes on.
I have no idea where an audible sound would come from. The alternator is geared to the flywheel, I hope the gears are ok.
Lots of things can cause the engine to quit. Water in the fuel, carb ice, something. I don’t think it could be ignition, since both mags won’t quit at the same time.
My first thought would be to remove the alternator and make sure the gears are ok. Maybe someone on this thread can figure out what connection there could be between the engine quitting and the alternator quitting!