todo:
imrpove memory management
handle dead jack ports
improve 4point interpolation or use libsamplerate
stopwatch for klopfer (shift+in/+out)
fix playback for many grains plaing a DS
insert act-number somewhere visible
fix rec-peakview calculation
allow longer grainsizes
fix sample block calculation to reduce load
syncing/linking of loopers
per-loop routing dialog
move jack-connect to gui-thread
better colors
aubio-lib for attack-detection

much later:
other views (spiral, rolling...) ?
volume curve for gtkloopview
internal clipboard, cut, copy, paste...
undo redo for buffer operations
ladcca/lash support

