Is anyone familiar with transcranial alternating current stimulation? As a synthesizer geek with a lot of, ah, neuro-introspective experience, modulation seems like a very natural avenue of exploration to me. I get intense pleasure sensations from simply listening to certain kinds of sounds (not necessarily in a musical context) and find it therapeutic to play and adjust droning noises at low frequencies, and have experimented with generating interfence patterns at brainwave frequencies as well as resonant frequencies of the body or harmonics thereof (eg the sort of sub-basses you can feel in your chest). I had actually been thinking about picking up a NeuroSky measuring headset because their SDK includes a tool for MIDI translation, but I'm also curious about tA/DCS.