I have been doing accent work since about 1975 or so. The first paper was published on it in 1984. (If you'd like a free copy of that, let me know and I'll send you one.) Our 2013 article gives you a pretty good picture of what it is about. Would love to work with you if you have the "wiring" and time. If interested, check out the AHAE program page. (It is still a work in progress but it will give you a pretty good idea of what it is about.)