ALESIS QS8.1 - Manual (Page 137)

Editing Programs: Part 8
QS7.1/QS8.1 Reference Manual
Velocity (-99 to +99) Page 3
At +00, velocity has no effect on the filter cutoff. With positive values, playing harder
increases the filter cutoff. More positive values drive the cutoff frequency higher for a
given amount of velocity. More negative values drive the cutoff frequency lower for
a given amount of velocity.
Many acoustic instruments, such as acoustic guitars, sound brighter when you play
them more forcefully. Adding a little positive velocity control over the filter can
simulate more realistic acoustic sounds.
Modulation Wheel Depth (-99 to +99) Page 4
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) Page 5
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.
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) Page 6
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 Filter LFO
Function on button [7] (see page 146).
Note: If you hear no change when you alter this parameter, spend some time
experimenting with the Filter LFO Functions on button [7].
Another note: If your Filter LFO is using the Square, Up Saw, Down Saw, or
Random+ waveshapes, you may get a more pronounced effect if you use a negative
setting for Filter LFO Depth. See page 144 for more information about the various
LFO waveshapes.
Filter LFO is good for giving wah-wah effects at slower LFO speeds, and for adding
“shimmering” with higher LFO speeds.
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