Stuck a sound system on my SoCal new Ebike just built Big Red. For my sound system I use a GE 228 Turbofan cranked loud. Rode past the police, they smiled and waived, was in the street and bike path. I waived back and one yelled he liked my handlebars.
Ironically, most people don't like music because some like certain toons. They also get irritated by the bell to move over, thinking it rude, but a "Mock" jet engine bike, well now everyone is polite. Damned sound works
good, might keep it, though I really do miss my tunes when riding.
Hey in California there is a nice loophole on motorized bicycles on bike paths. If any part of the bike path is "Adjacent to a road" a motorized bicycle is permitted. Their written legislation not mine and luving it for now. You know Big Red my friend, I think the thing here is just common sense. Not make waves, be safety conscious and not be a dork on the bike paths etc or being too aggressive but mainly safe and the cops roll with it. They seem to be very flexible. Even when I have ridden above 20, they are very lenient at least in Cali. Only city to stay shy of is the town of Ventura. Nasty bunch there to cyclists.