One very nice feature of both the wholetone and diminished chromatic tunings is that once you learn a scale, arpeggio, interval or other pattern, transposing that pattern across all keys is easy and consistent.
With the wholetone tuning each pattern has four possible "positions" and even those four positions are related, sort of like reflections in a four-way mirror.
In the diminished tuning you can reduce everything down to only three positions (with an optional 4th). But the positions aren't such exact reflections of each other as in the wholetone.
Today I was practicing interval exercises on the diminished. If you start on a draw slide in, moving up two hole and letting the slide out will always result in a perfect 4th draw, or moving up five holes and letting the slide out will always give you a 9th draw.
It still boggles my puny mind as to how standard solo tuned chromatic players keep track of things when sometimes a particular move gives you one interval but if you start on a different hole the same move will give you a different interval!
Any insights from you standard solo players as to how you keep track of things like that? I know Mike Polesky simply keeps the name of each note in his mind as he's playing and doesn't even think about the physical/spatial jump involved on the harp. Do the rest of you work that way too?
Also, I was wondering what other chromatic tunings give you a limited number of positions. The wholetone has 4 positions, the diminished has 3, are there any practicable tunings that have only 2 or 1? I would imagine that the fewer positions you have, the longer the harp is going to become over the space of one octave. Maybe Pat Missin knows of some interesting tunings like that.