APPLIED ACOUSTICS SYSTEMS STRINGSTUDIO Manual do Utilizador descarregar pdf (Página 46)

46 Parameters

that of the original signal. The amount of effect is determined by the ratio of wet and dry signal

mixed together as shown in Figure 29. As the amount of wet signal sent to the output is reduced, the

amount of rejection increases. The shape of the frequency of the Phaser module is also inﬂuenced

by the amount of wet signal re-injected into the feedback loop. Increasing the feedback enhances

frequency components least affected by the all-pass ﬁlter. As the feedback is increased, these peaks

become sharper. The functioning of the Phaser is very similar to that of the Flanger module. The

ﬁltering effect is different however, since the Phaser module only introduces rejection around a

limited number of frequencies which, in addition, are not in an harmonic relationship.

0 dB

Amp

Frequency

Light effect (mix=0.1)

Medium effect (mix=0.25)

Strong effect (mix=0.5)

250 Hz 2435 Hz

Figure 29: Frequency response of a Phaser module. Effect of the mix between wet and dry signal

on the frequency response.

Tuning

The location of the ﬁrst notch in the frequency response of the module is adjusted with the Fre-

quency knob This frequency can be modulated by an amount controlled with the Depth knob. In its

leftmost position, the location of the ﬁrst notch is ﬁxed but it starts to oscillate by an amount which

increases as the Depth knob is turned clockwise. The frequency of the modulation is controlled

using the the Rate knob. The feedback knob is used to ﬁx the amount of wet signal re-injected into

the delay. Finally, the Mix knob determines the amount of dry and wet signal sent to the output.

When this knob is adjusted in the left position, only dry signal is sent to the output, in its center

position, there is an equal amount of dry and wet signal in the output and in the right position, only

wet signal is sent to the output.

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APPLIED ACOUSTICS SYSTEMS STRINGSTUDIO Manual do Utilizador Página 46