Quick question, does anyone know the exact timing for the 6 square oscillators that make up the hi hat sounds on the TR-606?
I'm also trying to find this out, which is how I came upon your question. I've had no luck yet with the 606 hats, but I have found a page which shows the 4 oscillator tunings of the quite similar Boss DR-110 hats - as well as their respective VCA decay times (which are all different, interestingly).
Anyway it may help, and I'll let you know if my searching comes up with similar for the 606 (or 808, which as far as I know is the same as the 606 but with added white noise).
Good luck - and please let me know if you do find them!