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Sound (in this case simply white noise) goes in one corner, comes out the opposite corner. 10min ambient drone loop.

https://mathr.co.uk/misc/2016-11-22_graphgrow_audio_filter_3.ogv

FFT Filter coefficients are calculated on the GPU, written to a file, and used in Pure-data to process the sound, with a visualisation of the same fractal using Gem for Pd.

Source code here: https://code.mathr.co.uk/graphgrow/tree/HEAD:/c

Currently hard-coded one particular fractal shape controlled by a single parameter, eventually plan to support fully-connected graph-directed iterated function systems of similarities, with a graphical editor.

The .ogv is the video with sound - plays right in the browser if you click the link (at least it does so in firefox on Linux).  Otherwise VLC or similar should handle it fine...

woot, it gets on my ears in the middle, very high frequencies very disturbing .... had to quit after 5 minutes