Creating AudioData and FFTData Wrapper Objects Wastes CPU

[ResonantCavity]

I was able to significantly reduce CPU overhead in my app by ripping out AudioData and passing a byte[] directly to the renderer. On an N7, CPU went from a steady 40% to 30%, which includes some complex audio processing that app does. Creating all of those objects in a tight loop is going to impose significant costs because of the work to instantiate the object and to garbage collect it.

If the goal of overloading render() is to have different method signatures for time-domain vs. frequency domain signals, just change the names of the methods to renderWaveform() and renderFFT().