Frequent operations in performance

[Ignotus-mago]

Let's make a list for the LoadAudioToImage sample code:

1. Open an audio file, load it to a buffer: audioFile and other locators
2. Get a reference to the buffer audio array (or multiple arrays): audioBuffer
3. Get a copy of the buffer array that is mapSize frames, padded or trimmed if necessary: audioSignal
4. Transcode the signal to an RGB array in signal order: rgbSignal
5. Write rgbSignal to an image for display: mapImage
6. Click on display to trigger audio events with a SamplerInstrument: audioSampler, adsr, samplerInstrument
7. Load audio from files to color channels of rgbSignal
8. Write rgbSignal to audioSignal

Also desirable:

Save images and audio to image and audio files.
Load a piece of audio to the most recent samplerInstrument selection.
Windowed collage of audio/image.

For the most part, working with the signal path.