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I'm guessing that triple correlation could also be rendered into pretty pictures, did you try that?
by js6i 6y ago
I'm guessing that triple correlation could also be rendered into pretty pictures, did you try that?
- gbh444g 6y agoHeh, you're reading my mind. Try the URL below, but don't increase fps/n params, as that will eat all your GPU cycles very quickly: soundshader.github.io/?s=acf3&n=512&fps=1&acf.decay=0 It effectively computes the bispectrum as B(p, q) = F(p)F(q)F^(p+q) and runs the inverse 2D FFT to restore the triple autocorrelation. The results are interesting, but not impressive and very GPU intensive (NxNxlog(N) per frame is slow). In any case, I strongly believe that bispectrum is hiding something interesting and I just haven't figured how to see it.
- js6i 6y agoCool! Maybe it's because it contains phase information which is not that relevant to hearing. FWIW I remember long time ago using it for image processing and the trick was to look at a sections of it, i.e. TC(p1, p2) where one of p1 or p2 was fixed.