Bedienungsanleitung AAS Strum Electric GS-1 (Seite 61 von 98) (Englisch)

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6.5 Edit Mode 61

6.5.6 The Pickups Module

The Pickups module simulates the action of the pickups on the

guitar. There are two pickups in Strum, labeled Neck and Bridge,

which can be adjusted in various ways in order to obtain tonal col-

ors of different guitar types. They are activated by using the N, B

or + selector on the main view of the interface as explained in sec-

tion 6.2.5.

The Type selector allows one to choose between single coil or

humbucker pickups by clicking on the S or H button respectively.

Single coil pickups are made, as their name suggest, from a single

coil wounded around a permanent magnet. While this type of pickup

sounds great it has the disadvantage on a real guitar that it transmits,

in addition to the signal from the vibrating string, mains hum at the frequency of the mains alter-

nating current. In order to overcome this effect a clever device, known as the humbucker pickup,

was developed. Basically, a humbucker pickup consists of two single coil pickups with opposing

windings and polarities wired in series. This arrangement results in a reduction of the ambient

noise by destructive interference while the signal from the strings is ampliﬁed due to constructive

interference. But noise reduction is not the only effect of using two coils. This conﬁguration also

changes the tone of the pickup which is responsible for the characteristic tone of speciﬁc guitar

types. Humbucker pickups typically produce a “warm” and “fat” tone while single coil pickups

usually sound “brighter” and “clearer”.

The electric signal from the pickup is sent to the ampliﬁer via a simple electric circuit and a

cable. The combined inductance, capacitance and resistances of this circuit form a resonant low-

pass ﬁlter. The quality factor and the cut-off frequency of this circuit can be adjusted for each

pickup using the Freq and Res knobs respectively allowing one to further adjust the tone of the

guitar signal.

The position of each pickup can also be adjusted from bridge to neck position using the Pos

knob. Using the M or mid position allows to position the pickup halfway between the bridge and

the neck. It is common, in different guitar types to listen to a single pickup at each of these position

or to mix the signal from the bridge and neck pickups or to combine one of these with the signal

from a third one positioned in the middle. On a real guitar, one can choose between these different

conﬁgurations using switch on the body of the instrument.

Finally, another parameter which affects the sound of the guitar is the relative amplitude of the

signal from each pickup. On a real instrument this is controlled by adjusting the vertical distance

between the pickups and the strings. In Strum this is adjusted using the Trim knob which allows

one to vary the amplitude of the neck pickup from -10 dB (leftmost position) to 10 dB (rightmost

position).

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AAS Strum Electric GS-1 Seite 61

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