* Move drums into their own folder
* Load instrument samples
* Play notes
* Concurrency limit is shared across drums and instruments
* Increase MIDI note range
* Set instrument directly on musicState object
* JSDoc
* Clean up the play note functions and add comments
* Cleanup
* Check for audioEngine in playDrumNum
* JSDoc and comments
* Round the instrument number
* Fix unit test for set instrument
* Comment fixes
* Nit (condense onto single line)
Eric Rosenbaum
5fbfecb1a9