backward string movement). The first octave for example can move in the
opposite direction to the key tone along the neck. This explains why the
feedback turns from the key note to the first octave when shifting the
Resonators phase.
The Resonators oscillating magnetic field offers a spectrum of frequencies
from which only string vibrations in phase are amplified. Finally, the
harmonics with the largest amplitude is „the winner“. This frequency falls into
feedback. At the same time, reverse phase vibrations are damped. The
amplitudes of the harmonics change from zero to maximum along the guitar
neck. However, phase and amplitude changes along the guitar neck are the
reason for the different feedback harmonics on different Resonator positions.
9
Summary of Contents for GR-1
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