I believe I have solved my bells/oblivious pedestrians problem.

#1 I'm avoiding mixed-use bike paths as much as possible.

# I have installed two Knog Oi bells; a left-hand bell and a right-hand, on the downward curves of my drop-bars, where they are easily reached while on the hoods.

These bells are not loud at all, but they take up less room than any other bells I've seen. Because I have two of them, I can beat out any kind of pattern I want (musician and cyclist here). The novelty and continuity of the sounds more than makes up for the lack of volume. The bells' notes are only a quarter-tone apart. I would have preferred a minor 3rd for that nursery-rhyme vibe.

I like to imitate the sound of an ambulance from the 1880s. So far this system has not failed to get the walking dead out of my way. Not once.