[Feature Request] GPU FFT processing

[bugilt]

trafficstars

It looks like the GPU is much faster processing FFT.

http://www.aholme.co.uk/GPU_FFT/Main.htm

https://www.raspberrypi.org/blog/accelerating-fourier-transforms-using-the-gpu/

[scottlawsonbc]

Thank you for bringing this to my attention. FFT is one of the most expensive operations in the audio visualization code, and this could potentially be a big help.

[steveway]

Just a reminder, there are python bindings available already: #29