The hihats are bases around the HD14584 Schmitt trigger which generates 6 triangle waves at different frequencies. These signals are mixed together into 2 separate signals from which 1 is send to the HiHats circuit. Like the toms circuit, the hihats circuit also shares a lot of components with each other so some of the modifications effect both the Closed as the Open HiHat.
– OHH Decay
– CHH Decay