mc.waveform

hi there,
this is both,
- sharing a jsui for displaying multichannel waveforms with optionally displaying a soundfile from disc
and
- a question about how to use task() to put the disk-reading into some deferlow mode:
the reading-from-disc here is done with a hidden buffer~ object (in the patcher) that
reads chunks (600samples) of a (maybe large) soundfile in a loop into a js-array.
i failed to do this in background so that the mouseaction is not blocked while redrawing the waveform.
if someone could have a brief look into my function "drawwf" (section sf-read) that would be outstanding great ;)
cheers
klaus