This tries to make our code a bit more compliant with our code formatting
conventions. For future use, this is the command I used:
git ls-files "*.cpp" "*.h" | xargs sed -i -e 's/[ \t]*$//'
Make the player be centered on a fixed number of "generators" instead of
MIDI channels that arbitrarily allocate generators for notes.
Make the audio stream to be stereo and for sample rate use _sampleRate.
Rewrite the synthesis core:
* Make generators use both oscillators
* Implement swap mode for oscillators
* Fix envelope update frequency
