Filter
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Editing Programs: Chapter 6
QuadraSynth Plus Piano Reference Manual 87
Filter (Page 2)
Modulation Wheel Depth (-99 to +99)
Determines how moving the modulation wheel affects the filter
cutoff frequency. Example: With positive settings, moving the
modulation wheel up raises the filter cutoff frequency and
moving it down lowers the filter cutoff frequency. With negative
settings, moving the modulation wheel up lowers the filter
cutoff frequency and moving it down raises the filter cutoff
frequency .
Aftertouch Depth (-99 to +99)
At +00, aftertouch has no effect on the filter cutoff frequency.
Applying aftertouch with this parameter set to a positive value
raises the filter cutoff frequency; conversely, applying aftertouch
with a negative value lowers the filter cutoff frequency. The
higher the number (either positive or negative), the greater the
effect for a given amount of aftertouch.
Tip: Many acoustic instruments sound brighter as you play them
more forcefully; in particular, brass gets brighter as you blow
harder. Using aftertouch to increase a sound’s brightness can
give more control and realism with acoustic instruments.
Filter LFO Depth (-99 to +99)
At +00, the filter LFO has no effect. Higher positive values
increase the amount of filter LFO modulation. Negative values
give the same apparent effect, but with reversed LFO phase (i.e.,
if the filter cutoff frequency would normally be increasing with
depth set to a positive number, the cutoff would instead be
decreasing at that same moment had the depth been set to a
negative number). Filter LFO parameters (such as speed and
wave shape) are programmed from within the FLFO Function
(see page 69).
Tip: Filter LFO is good for giving wah-wah effects at slower LFO
speeds, and for adding “shimmering” with higher LFO speeds.
Filter Envelope Depth (-99 to +99)
The Filter Envelope is one of the most important settings in
making a program. Many programs will use the Filter Envelope
to determine the tonal character of the sound over time (attack,
decay, sustain, and release). At +00, the filter envelope has no
effect. Positive values raise the filter from the baseline cutoff
frequency according to the envelope shape, and negative values
similarly lower the cutoff frequency. The higher the number
(negative or positive), the greater the effect. Filter Envelope
parameters (such as attack and decay time) are programmed
within the FENV Function (see page 74).