Gewa G9, Owner'S Manual

Page: 82 / 180

Distortion / Saturation
Overloads the audio signal with gain and adds additional harmonic frequencies to the mix, resulting in a fuller but
in case of distortion also edgier sound. This method is prone to scaling up frequency amplitudes along the fre-
quency spectrum, with the result, that the amplitude would surpass 0 dB at more and more frequencies. Conse-
quently, audio
Clipping is forced to generate the effect of added harmonics in the audio mix.
Two methods are provided, who differ in the way of dealing with clipping: Distortion and Overdrive . While Distor-
tion radically levels amplitudes crossing 0 dB ( hard clipping ), Overdrive rounds off the amplitude at the boundaries
of bandwidth, where clipping would occur ( soft clipping ). Which method provides the better results depends on
the audio material (samples) utilized.
Parameters Range Unit Dry/Wet Description
Type
OD, DS
Choose between two methods of effect generation
with distinct characteristics:
OD (Overdrive) and DS
(Distortion) . While Overdrive models the characteristics
known from tube amplifiers, Distortion provides the
characteristics of distortion typical of Transistor amplifi-
ers.
Drive
0-100 %
This parameter controls the intensity of the effect
(scaling up frequency amplitudes).
Values range from 0% (linear) up to 100% (max Drive
amount).
Frequency
250Hz - 8kHz Hz
This parameter determines the frequency spectrum
affected by the chosen effect
Type . If you prefer to
saturate only the lower end of the frequency spec-
trum, set the desired filter frequency for the underlying
Low Pass filter with transition steepness of 12 dB.
Post Gain
(- ∞ ) - 0 dB
Adding this effect type will considerably amplify the
output signal. With post gain you can attenuate the
mix. Values range from -
∞ (muted) up to 0 (min atten-
uation).
Chorus
Creates a fuller sound by the illusion of multiple instruments being played simultaneously. The effect is achieved by
doubling the dry sound and offsetting the detuned duplicate slightly in time (fixed delay time of 20 ms). The
frequency modulation of the duplicate signal is controlled by different LFO waveforms available.
Parameters Range Unit Dry/Wet Description
Type
Sine, Triangle
Determines the displacement waveform of the under-
lying Low Frequency Oscillator (LFO). This is a control
curve outside the audible spectrum of human hearing
(below 20 Hz, see also
Modulation Rate ). With the
waveform you can give the effect distinct characteris-
tics. Sine produces smooth characteristics, while
triangle allows for more earthy characteristics of the
delayed duplicate.
Modulation Rate
0-10 Hz
Controls the speed of LFO displacement and thus the
speed of the wavering sound. This parameter controls
the period of the LFO waveform.
Modulation Depth
0-127
Controls the intensity of the effect by adjusting the
height of the LFO amplitude. The parameter values
range from 0 (off) to 127 (intense).