documentation-notes

notes for usage:
* perform() does not automatically calculate how many ticks to process for patches that read from a .wav file.
  that is, if you have a wave file that is 100 ticks long and you call perform(200), it wont stop after those 100 ticks.
  you'll have an extra 100 ticks of silence, assuming you have nothing else in the patch. to get around this, load the sound
  file you play in that patch into an AudioStreamPlayer, get the .length of it's .data field, then store that and use that as
  a reference for how many ticks to pass to perform().
* make sure that you don't overwrite an AudioStreamPlayer's .data field with the PoolByteArray from perform() *while the player is currently playing*,
  especially if you're calling perform() with a lower number of ticks than you did for the prior perform() call (e.g.: perform(100) followed by perform(50))
  it'll result in weirdness that may see the player try to play past the amount of data it has available to it.