Howdy all!

Okay - what's the difference between pink noise and white noise???

I read it some time ago - lost the article - just wondering!

Anyone know of any VSTs that have pink noise as a sound source???

Reg.

http://whatis.techtarget.com/definition/0,,sid9_gci213526,00.html

reaktor can probably do pink noise , will have to check!!

Technically speaking, pink noise is "filtered" or attenuated white noise, and in such a way that the resulting noise has equal energy per octave.

"White noise has the same distribution of power for all frequencies, so there is the same amount of power between 0 and 500 Hz, 500 and 1,000 Hz or 20,000 and 20,500 Hz.

Pink noise has the same distribution of power for each octave, so the power between 0.5 Hz and 1 Hz is the same as between 5,000 Hz and 10,000 Hz."

Quoted that from this website:
http://www.firstpr.com.au/dsp/pink-noise/
(site takes a while to load)

You will find extensive but maybe a bit complicated explanations there

Here's another link to 1/f noise:
http://linkage.rockefeller.edu/wli/1fnoise/

Cheers

Toby

www.tobybear.de

quote:

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Originally posted by mrtunes:
what characteristics does pink noise have? The artice said white noise is similar to wind or an ocean(when using a foley effect). What would pink noise be used to re-create?

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just grab cooledit and generate all the diff noizes , you ll see (or hear)

There are two main procedures to get the different noise colors.

The first is the "analog" way to get brown, pink or white noise: filtering a white noise with a low pass or band pass filter.

The second is to produce a digital noise with a frequency dependent random noise generator. This kind has more "energie", because it is directly generatet (not filtered).

Tip: Both you can get with the Rebel2 or the free Sonic. These synthesizers have a Noise Generator with tunable noise color (edge parameter) and diverse filter possibilities to get all colors of Noise.

A) what the f*ck is brown noise?

B) How can yo tune pure white noise?

C) I think I understand!

Reg

quote:

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Originally posted by RegPheonix:
A) what the f*ck is brown noise?

Reg

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cool edit cool edit cool edit

download cool edit, generate them and listen for yourself. That s a link to the trial version!

http://www.syntrillium.com/download/download.html?1

[ 03 January 2002: Message edited by: afx23 ]

Yea, and here is the link to the free SONIC.

SONIC, the tunable white noise synthesizer

quote:

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Originally posted by RegPheonix:
A) what the f*ck is brown noise?
Reg

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A) Coloured noises have power spectrum S= 1/f^a
(that is one over f to the power of a).
White noise: a=0
Pink (or 1/f) noise: a=1
Brown (or bronwian) noise: a=2
Black noise: a=3
Blue noise: a=-1


Cheers,

G.

Okay!

So am I right in saying that if I play a noise waveform wind sound on my keboard and it sounds higher and lower in pitch, then that is coloured noise? A bit like JX10 or JX16s artic wind?

Reg.

quote:

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Originally posted by RegPheonix:

So am I right in saying that if I play a noise waveform wind sound on my keboard and it sounds higher and lower in pitch, then that is coloured noise? Reg.

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No, for fractional noises, they are always the same.
Noises do not have a characteristic pitch, all frequencies are present (in theory); their spectral power (in the case of 1/f family) is described by the power law 1/f^a.
If you have a noise that sounds brighter when you go up in the keyboard, then probably you have a (white?) noise genererator and a tuned LPF filter (the cutoff freq. opens with the increasing key number).
Alternative, it may be that you have a noise which changes the spectal content with time usign a LFO that opens and closes the cutoff of the filter.
Both situations change the spectral contents of the noise, but by then they are not pure 1/f noises anymore.
I hope this clarifies it a bit.
Cheers,
G.