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4.3 The FX View 37

the note is released. When the note is released the envelope signal returns to zero following the

release phase. The ADR mode is quite similar to the preceding mode and only differs in that the

looping is done by cycling trough the attack, decay and release phases. Finally, in the Once mode,

the envelope is played normally but the envelope generator cycles once more through the attack

and release phase when the key is released.

4.3 The FX View

The FX view is displayed by clicking on the FX button in the utility section at the top of the

interface and is based around a Multi-effects module.

The Multi-Effects module allows one to process and shape the signal from the synthesizer

before sending it to the output. This module comprises an EQ and a Compressor in series with

two conﬁgurable effect processors followed by a Reverb module. The conﬁguration of the EQ and

the Compressor module depends on the position of the SC and Pre butons of these modules as will

be explained below. The two effect processors can be set to a different type by using the drop-down

menu located at the center of each module for a wide range of possibilities. The effect list includes

a Delay, Distortion, Chorus, Flanger, Phaser, Wah Wah, Auto Wah and a Notch ﬁlter. The

order of the effect modules in the signal path can be changed by click-dragging the handles located

on the left of the modules.

The Multi-Effects module is also visible from the Play view just below the utility section. This

allows one to see rapidly which effects are selected for a given sound, turn the effects on or off and

rapidly adjust the amount of each effect. The Compressor, Equalizer and Reverb can also be

adjusted from this view.

4.3.1 EQ

The EQ module provides equalization over the low, mid, and high frequency bands. It is composed

of a low shelf ﬁlter, two peak ﬁlters, and a high shelf ﬁlter in series, labelled LF, LMF, HMF, and

HF respectively.

The functioning of the low shelf

ﬁlter is depicted in Figure 19. The

ﬁlter applies a gain factor to low fre-

quency components located below

a cutoff frequency while leaving those above unchanged. The cutoff frequency of this ﬁlter is

adjusted using the Freq knob and can vary between 40 and 400 Hz. The Gain knob is used to

adjust the gain factor applied to the signal in a ±15dB range. In its center position there is no

attenuation (0 dB). Turning it clockwise boosts the amplitude of low frequencies while turning it

anti-clockwise reduces it.

The high frequency content of the signal is controlled with a high shelf ﬁlter that works in

the opposite manner as the low shelf ﬁlter as illustrated in Figure 19. The ﬁlter applies a gain

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