the zoom-out capabilities are remarkably slow. i had
terrible performance when zooming out of an 300mb
wavefile (20 minutes).
while loading, create peakfiles that collect peak
frames of 256 to 1024 samples. when the zoom falls over
the threshold for 256 to 1024 samples, use the peakfile
instead of collecting the peak data from the wavefile.
wavelab does it like that, which results in very fast