Have some crunchy slippery groove.

#patchnotes: Dual slew limiter feedback. SL2's end-of-slew goes to SL1's in. Both outs are mixed and sent to SL2's in. SL1's end modulates SL2's slew rate, and SL1's rate is modulated by the mixed output fed through Cold Mac's crease wavefolder. The mix is modulated by an unstable LFO, sent through another wavefolder, filter, and out. A comparator (gate when SL1 > SL2) is clock-divided twice then pings a low filter which is mixed in at the final wavefolder.