Wrapping of Synthesis toolkit physical model instruments https://ccrma.stanford.edu/software/stk/index.html
The number identifying which instrument is used (Can be setted with Stk Array)
Does noteOn on 0 to 1 changes and noteOff on 1 to 0 changes.
Amplitude used on noteOn.
Amplitude used on noteOff.
Array of control numbers and control values (most of them 0-128) according to Stk.