Filter
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Editing Programs: Chapter 6
QuadraSynth Plus Piano Reference Manual 101
Filter LFO
Filter LFO (Page 1)
The Filter LFO is most often used to apply tremolo-like or "wah-
wah" effects to a sound.
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The following Filter LFO variables will affect the sound only if the
FILTER LFO DEPTH (on Page 2 of the FILTER function) is set to a
value other than 0 , or, if Filter LFO is a source in the MOD function.
Also note that the Filter LFO may have no effect if some other
modulation source or setting has already pushed the filter cutoff
frequency to its maximum.
Wave (8 choices)
The waveform determines the shape of the LFO. Use Quad Knob
[1] to select either Sine, Triangle, Square, Up Sawtooth, Down
Sawtooth, Random+-, Noise or Random+. For a graphic
representation of these waveforms, see the diagram in the Wave
section of the PLFO description on page 67.
Speed (00 to 99)
Quad Knob [2] controls the speed or rate of the LFO. For fast
modulation, increase this value. For slower modulation, decrease
this value.
Delay (00 to 99)
This is the amount of time that is to occur before the LFO fades
in. Sometimes, it is desirable to have modulation come in a
moment or two after a note has been played, rather than starting
instantly. The higher the value, the slower the LFO fades in.
Trigger (Mono, Poly, Key Mono, or Key Poly)
The Trigger parameter determines how the LFO should be
triggered, or started. There are four possible settings: Mono,
Poly, Key Mono and Key Poly. A description of these settings is
found in the Trigger section of the PLFO description on page 67.
Filter LFO (Page 2)
Level (00 to 99)
This is the base output level of the Filter LFO. If you want to
have a constant value of tremolo to the filter, even without using
the Mod Wheel or Aftertouch, set LEVEL above 00. The Mod
Wheel and Aftertouch will add or subtract from this base level.
Example: If Level is set to 10 and the Mod Wheel parameter is set
to 10, there will always be some filter tremolo, and raising the
Mod Wheel will add more tremolo. On the other hand, if the
Mod Wheel parameter is set to -10, raising the Mod Wheel to the
top will cancel out all tremolo.