It has got a drag contact that can be patched, to control the bends and more...

(Below you can see two versions of the circuit-bent casio sk-1, the top pictures are of the newest version..)

And it has got a arpeggios circuit for overall pitch control..

It has also got a video out, The video out is basically just the signals from the patch bay going throe a 1k resistor and a diode.. i dont know if this is necessary.. but seemed right.. video signal is around 1 volts and the pins from the casio chip are 5.. so its a bit dangerous (maybe.. maybe-not).. My equipment has not broken jet..

---

---