ART Pro Audio Quadra/Fx - Two Channel Effects Processor User Manual
Page 58
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TREMOLO
Delay
(Predelay
± 1 ms)
Size
(Predelay
± 50 ms)
Regen
Decay
(Fade
Time)
Shape
(LFO
Shape)
Pitch
Speed
(LFO
Speed)
Width
(LFO
Width)
Special
(*see below)
Vocal
0–1000ms
0–1000ms
0–100
1–7
0–10.5Hz
0–100%
Threshold
Instrument
0–1000ms
0–1000ms
1–7
0–10.5Hz
0–100%
Concert
0–1000ms
0–1000ms
1–7
0–10.5Hz
0–100%
Gated
0–1000ms
0–1000ms
1–7
0–10.5Hz
0–100%
Threshold
Ambient
0–1000ms
0–1000ms
1–7
0–10.5Hz
0–100%
Diff. Factor
Dynamic
0–1000ms
0–1000ms
1–7
0–10.5Hz
0–100%
Threshold
Delay:
Changes the predelay time in
±
1 millisecond steps. The total amount of predelay is 1 second (1000 ms.)
Size:
Changes the predelay time in
±
50 millisecond steps.
Regen: (Not used.)
Decay:
This parameter is used in Vocal class and sets the amount of time it takes the effect to fade in and out after
the Threshold level is crossed. A graph of this control’s action is on page 66.
Shape:
Selects the LFO shape. Use the LFO Shapes table to match the parameter’s value with an LFO waveform.
Also, see page 65 for graphs of the various LFOs.
Pitch:
(Not used.)
Speed:
Sets the LFO speed between 0 and 10.5 cycles per second (Hz.)
Width:
Sets the LFO modulation width, or amount, from 0% to 100%.
Special: In Vocal and Gated classes, Special sets the audio input level (Threshold) that controls the gating action of
the effect. This parameter can be set in 1-dB increments, from 1 to 30 dB below full-scale. Normally, when
the input signal is above the Threshold setting, the tremolo is muted. With signals below the Threshold, the
tremolo is heard. If the value in the Display is preceded by an r (
), this gating action is reversed; signals
above the Threshold setting have the tremolo effect and ones below do not.
Dynamic class uses the Quadra/FX’s dynamics sensing to trigger the LFO through one cycle of its sweep.
The Threshold range is the same as with the Vocal and Gated classes; it can be set in 1-dB increments,
from 1 to 30 dB below full-scale. When the input signal crosses above the set Threshold, the LFO is
triggered once through its cycle at the preset LFO Speed and Width. The LFO is reset when the input signal
falls below the Threshold level. Crossing the Threshold again will trigger another LFO cycle. Normally, the
LFO starts at its low value, sweeps through its high range, and ends back at its low value. However, if an r
(
) precedes the Threshold setting, the LFO will start at its high value, sweep through its low range and end
LFO Shapes
1
Sine
2
Triangle
3
Rectified Sine
4
Inverted Rectified Sine
5
Square
6
Ramp
7
Inverted Ramp