Dang - maybe that's why the ePro I had a quick try on a while ago didn't do what I expected.
Now I get why it has a whole bunch of coils - or so I'm told - it's straightening out the curve. I don't know sufficient about coils to know how, but that's ok. So the ePro isn't strictly linear, but it's a lot closer that the etherwave - which does get compressed around the highest pitches, and rather stretched out around the bass.
I'm curious - did it take long to adjust to the ePro after the etherwave? Or did you just find that playing was the same and you had a larger range of usable pitches?
Also - do the coils affect the playability in other ways - do they introduce any latency?