Xref: utzoo comp.music:1037 alt.fractals:207 comp.sources.wanted:11329
Path: utzoo!censor!geac!torsqnt!news-server.csri.toronto.edu!cs.utexas.edu!asuvax!ncar!mephisto!ncsuvx!news
From: george@shumv1.ncsu.edu (George Browning)
Newsgroups: comp.music,alt.fractals,comp.sources.wanted
Subject: Re: Fractal Music Generation (summary)
Keywords: I need help
Message-ID: <1990Apr9.151958.26859@ncsuvx.ncsu.edu>
Date: 9 Apr 90 15:19:58 GMT
References: <562@bilver.UUCP>
Reply-To: george@shumv1.ncsu.edu (George Browning)
Organization: NCSU Computing Center
Lines: 36

In article <562@bilver.UUCP> alex@bilver.UUCP (Alex Matulich) writes:
>Several weeks ago I posted an a plea for help in comp.music and
>comp.sources.wanted for an algorithm to generate fractal music.  I lost the
>original text of my posting, but the gist of it was this:
>

	I have an article from the book Fundamental Algorithms for
Computer Graphics written by Richard F. Voss that talks about fractal
music.  Voss says "One of my exciting discoveries was that almost all
musical melodies also mimic 1/f noise."  He gives some pictures and
examples, including a couple of "spectral density measurements of the
pitch variations in various types of music showing their common
correlations as 1/f noise"  These graphs show such things as Medieval
music up to 1300, Beethoven's 3rd Symphony and the Beatles Sgt. Pepper.
I am not sure exactly how to generate 1/f noise (it doesn't look too
easy) but I will know how to by the end of the semester, as my graphics
project depends on it.  I am going to use it to make both terrain maps
and texture maps for water.


You may also want to look at:

Voss, R. F. and Clarke, J. "1/f Noise in Music: Music from 1/f Noise",
J. Accous.  Soc. Am. 63, (1978), 258-263.

Voss, R. F. and Clarke, J. "'1/f noise' in music and speech", Nature
258, 317-8 (1975).



				- Jeff
--
_____________________________________________________________________
| George Browning                  North Carolina State University  |
| george@shumv1.ncsu.edu                               Raleigh, NC  |
|___________________________________________________________________|