If you like to go more into details, you can see that the pickup selection has
an influence on the feedback harmonics too. Since the Resonator input
comes from the selected pickup, amplitude and phase of the magnetic
oscillation depend on the pickup position. The neck pickup for example shows
much more key tone amplitude than the bridge pickup where the amplitude of
the first octave is much lower. As a consequence, the pickup selection also
controls the feedback harmonics. You can check this out simply by pickup
switching while playing feedback.
Last but not least the frequency characteristics of the pickups itself influence
the feedback harmonics. All this together makes clear why the Guitar
Resonator sounds individual depending on both, your instrument and your
playing style.
4.5 Feedback of multiple strings
Up to three strings can be agitated at the same time. This can be used for
feedback with power chords. It is normal here, that the feedback of one string
dominates. This is similar to amplifier feedback but with the difference that the
dominating string can be forced by the Resonators head position. This can be
done by moving the Resonator from the lower to the upper strings or the
other way round. By this the dominiating string can be changed while playing.
4.6 Limits of playing, pickup selection and power setting
The Resonator has been designed for positioning in the neck area. Basic
rule:
Keep away from the pickups!
If you are too close, an undesired direct
feedback from the Resonator to the selected pickup occurs. The minimum
distance to the active pickup depends on the Resonator power. 40% is a
good starting point. Start playing with the bridge pickup. Normally, the overall
neck area can be used with it. With the neck pickup the usable neck area is
smaller.
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Summary of Contents for GR-1
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