Vibesware GR-1 Manual de usuario descargar pdf (Pagina 9)

touching the strings. By the way: As we all know, new strings are essential for rich

string harmonics. This holds true particularly with feedback harmonics !

4.4 Some string vibration basics

Perhaps you would like to understand more about the dependencies of driven

feedback harmonics, Resonator position, phase and pickup selection ? In that

case, the theory of stationary waves might help.

The fundamental tone has one antinode with a maximum amplitude at the half

length. Then the first octave occurs which has two antinodes, showing maximums

at 1/4 and 3/4. At 1/3 we can see three antinodes which can be found in the tone

as the quintal from the first octave. The second octave shows at 1/4 length and

the third from the second octave at 1/5. The third octave has six antinodes. The

overall tone is given by the superposition of key tone and all these harmonics. The

percentages of the key tone and the harmonics depend on the guitar

characteristics (body, bridge etc.), the string(s), the notes played and also the way

you strike the strings. The quality of the strings (old or new) also affects the

harmonics mix. These pictures also show the phase shifting along the string

length (the dashed lines mean the 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.

1 2 3 4 5 6 7 8 9 10 11 12

Sin comentarios

Vibesware GR-1 Manual de usuario Pagina 9