Re: Periodic Noise

Lars Luthman <[email protected]>
Newsgroups gmane.comp.audio.csound.tekno
Message-ID <[email protected]>
On Mon, 22 Sep 2003, Chris Miller wrote:

> I'm looking for a good way to generate periodic white noise.  I tried Gen21, but makes the signal for standard noise unipolar. I tried using some of the other noise types, and got some results, but it was not quite what I was looking for.  I tried other noise types, like Guasian, but could not get the desired results (maybe I'm doing this wrong).
>
> A program that analyzes wavefiles into harmonic or enharmonic components might be the best useful to me.  I could then use Cool edit to generate noise, find the segment I want and break down the partials, and translate them into Csound.  I used to have a program that broke the waveform down, but don't know where to download anything like this. I guess I could load samples.
>
> Any thoughts?  Thanks.

What do you mean with "periodic"?

If you want to generate a noise sound that repeats itself with a
fixed period, you could use a delay line to record the first period
of noise (generated with an opcode of your choice) and then just read
it from the delay lines for the other periods. I used this to write
a "scratched vinyl" instrument with short noise bursts and pops that
repeated itself with a period of 1/45 minutes.


--ll


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