Handy tool to visualize Phase distortion

[gentleclockdivider]

Made a handy tool in pure data (plugdata tool to visualize phase distortion .
Just treat bottom envelope as zebra's curve editor , if you divide it by 4 , each rampis essentially pi/2 radians of a cosine
https://app.box.com/s/5m47qh5jt07ny38d9t5hzdofx5esmtdn