yeah but i'm one of those "why spend $300 on an mp3 player when i can build one for $50 and 6 months worth of work?" kinds of people (ok so actually i got one for xmas, but i'd already etched & put together the decoder board).

the thing is, i like being able to do my own tweaking with stuff, and since they don't give source with the commercial models, i find it limiting.

besides, there's a dildo interface to add :)

i've actually got code for a basic 8-bit AVR based light/sound machine. binaural beats i've got down, plus the basic visuals, etc, with a nice little menuing interface... although it's a spread out on the desk kinda project right now.

but i was hoping there might be e.g. grad students working on doing more in-depth analysis of light machine tech -- one of the biggest things i'm curious about, for example, is the effects of multiple frequencies (since our brains don't operate completely in alpha, beta, delta, etc... we have waves at different frequencies at different intensities)...

also, the products i've seen so far that do biofeedback are pretty much all galvanometer or temperature based, which will be a) generally a little slower and b) less informational than even a basic EEG.

so i want to build something different to play with.