Hi ~Kyle,
But is the algorithm only supposed to generate 1/2 of the
hfa array?
I "doodled" in it, just to play with the convolution, and
now the
agorithm is only writing to the first 512 locations of the
array. Is
it a bug?
It is wanted to be like that; actually in the original algo
there are arrays (of noise and hfa coeff) of 2n elements: n
values are filled, the other are padded with zeros.
Then real fft is done on the first n and convolution on 2n
elements.. so mine is an adaptation of this. When I looked
at the spectrum (in audacity) the noise seems to behave
fine; my concern is the strange sensation
in hearing the noise, like a small "feedback" even on a
single channel of output for high alpha..
Alberto
Hi,
attached is an abstraction for generation of "colored" noise
relatively new method (by J.N. Kasdin, 1995) that uses
frequency domain multiplication. White, pink, brown noise
(and intermediate flavors) can be obtained by varying
a single parameter (the slope of the spectrum in a linear
log(PSD)-log(f) plot).
I searched a bit in the archives and it seems to me that in
for noise generation in PD we actually have noise~ (uniform
white noise), pink~ (from zexy and cyclone) and a variety of
filters, but no direct generation of 1/f^a noise (am I
right?).
Inside the archive there is a short readme, look at it
first. To me the patch sounds a little "tubby", let me know
if you have the same feeling.
Any comment, suggestion for improvements is welcome.
The abstraction lives in
All the best,
Alberto Zin
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