Fix grouping.
Switch SynthDefs to addReplace

Hot-swaps existing synthdefs with new version.
Remove this - tested again in various configurations but it just doesn't sound good.
Remove event list stuff. This is mostly superseded by the TreeSnapshot view.
Another addReplace for testing cymbal.
Control large amplitude / squeal on higher notes

Larger volume is due to a combination of the initial bellFreq combs, and the later delaySpike combs interacting. Dial down the earlier combs with higher frequencies (the .explin), and avoid high frequencies for the delaySpike combs. The latter is too messy at the moment, but it's better than the squealing.
Refactor hiss component of \driver

This makes the hiss build-up more snappy, and injects some of the hiss sound driven by the core driver pulse when noiseAmt is turned up. The two (hissPulse and hissBuild) don't sound well together, but sound good on their own, so at some point it will have to be one or the other.