Takes an engine and series of events, wrapping the events as audio-events.
If single arg given, assumes it is a list of events.

Write output from doubles array into ByteBuffer. 
Maps -1.0,1.0 to Short/MIN_VALUE,Short/MAX_VALUE, truncating
values outside of -1.0,1.0.

Runs engine and writes output to memory, returning double[]. Engine should be single-channel. 
This will run the engine until all audio functions added to it are complete.  

Warning: Be careful not to render with an engine setup with infinite
duration!

Runs engine and writes output to disk.  This will run the engine until all
audio functions added to it are complete.  

Warning: Be careful not to render with an engine setup with infinite
duration!

Creates an audio engine

Kills all engines and clears them

Main realtime engine running function. Called within a thread from
engine-start.

Kills all engines and clears global engines list. Useful for development in REPL, but user must be 
careful after clearing not to use existing engines.

create an instance of an audio function and adds to the engine