This is an 808-style hihat synth. That is to say, it is a number of detuned pulse waves and a sine wave, both of which are ring-modulated with white noise. This is fed through a comb filter and overdrive. It could use some compression, but I'll leave that up to you to add in Ableton. Sorry for the cluttered interface. I couldn't think of a better way to fit things together. And all of the parameters seemed to make a significant enough difference to warrant keeping them on the front panel (especially the comb filter). Open and closed hats sounds can be achieved by tweaking the envelope (Decay and Curve) knobs. If you are using this in Drum Rack, I'd suggest starting with the open hat sound, then copying the entire cell (including effects) to your closed hat pad. You can then adjust the envelope, and possibly tune up the frequencies slightly to make your close hats sound.