[Csnd] Re: Re: Colored noise

Date

2009-12-21 22:05

From

"Partev Barr Sarkissian"

Subject

[Csnd] Re: Re: Colored noise

Brownian isn't a color, it's named after Robert Brown who came up with Brownian Motion, the somewhat random motion of molecules within a space. Browian noise is the audio version of the "random walk" noise.

Pink and red noise has to do with spectral harmonics. Just as white light is all colors equally, white noise is all equal amplitudes of all harmonics/partials. Other noise colors are a results of noise with differing quantities of partials.

Synths will have filters that will tend towards one color or another.

-PBS

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--- misterbobro@yahoo.com wrote:

From: cameron bobro <misterbobro@yahoo.com>
To: csound@lists.bath.ac.uk
Subject: [Csnd] Re: Colored noise
Date: Mon, 21 Dec 2009 06:39:13 -0800 (PST)

Correct me someone if I'm way off here- if Brownian noise is integrated white noise, and given a presumably good white noise in Csound, why not just integrate white noise to get "brown"(red)?

This is what I do simply because it sounds very nice and organic. But is it accurate Brownian noise? And if this is more or less accurate, wouldn't taking the RMS of this and the white noise give a "pinkish"? This also sounds good.

Both these colors are strikingly reminiscent of noise sources I've heard from analog synths (the brownish my old Vermona, the pinkish an old ARP), I'm just wondering how (in)accurate the methods really are.

Netscape. Just the Net You Need.

Date	2009-12-21 22:41
From	DavidW
Subject	[Csnd] Re: Re: Re: Colored noise
	see http://en.wikipedia.org/wiki/Colored_noise On 22/12/2009, at 9:05 AM, Partev Barr Sarkissian wrote: > Brownian isn't a color, it's named after Robert Brown who came up > with Brownian Motion, the somewhat random motion of molecules within > a space. Browian noise is the audio version of the "random walk" > noise. > > Pink and red noise has to do with spectral harmonics. Just as white > light is all colors equally, white noise is all equal amplitudes of > all harmonics/partials. Other noise colors are a results of noise > with differing quantities of partials. > > Synths will have filters that will tend towards one color or another. > > -PBS ... ________________________________________________ Dr David Worrall. - Experimental Polymedia: worrall.avatar.com.au - Sonification: www.sonifiction.com.au - Education for Financial Independence: www.mindthemarkets.com.au Send bugs reports to this list. To unsubscribe, send email sympa@lists.bath.ac.uk with body "unsubscribe csound"