Cross Modulation

From: Kamen Zenov (buddha_killah@hotmail.com)
Date: Wed Jul 25 2007 - 18:08:09 EDT


Has anyone tried preparing a piano with another piano? That is, instead of
hammers hitting the string, you have a (vibrating) string hitting the
string.

A string is vibrating at 261.6 Hz (C). Another string is vibrating at 392.0
Hz (G). While they are vibrating, you literally cross them, that is, string
C's center comes in contact with string G's center.

Is there a way to model this interaction? There are many phase-games at play
here, plus the fact that they cross ``at the octave`` (center).

If you have a guitar, try taking the 2 lowest or highest strings and have
the lower touch and pass over the higher, then hold that ``knot`` and play a
``note``.

on my bass guitar, i definitely hear a ring mod-type timbre, with the
strings hitting each other asymmetrically while rattling on the frets.
Sitar-like droning, too.

it's like when people meet and talk, ideas cross-mod and the result is a
conversation!

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