Alesis QuadraSynth Reference Manual page 65

Editing Programs
Determines how moving the pitch bend wheel affects the filter cutoff frequency.
Example: With positive settings, bending pitch up raises the filter cutoff frequency
and bending pitch down lowers the filter cutoff frequency. With negative settings,
bending pitch up lowers the filter cutoff frequency and bending pitch down raises
the filter cutoff frequency .
Depth (-99 to +99)
At +00, aftertouch has no effect on the 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
soundÕs brightness can give more control and realism with acoustic instruments.
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 72).
Tip: Filter LFO is good for giving wah-wah effects at slower LFO speeds, and for
adding ÒshimmeringÓ with higher LFO speeds.
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 76).
64 QuadraSynth Reference Manual