Peavey DPM V3 Owner's Manual page 34

higher resonance
values increase
7| fiter gain at the
a respon curvo cutoff frequency E
Filter
Amplitude
H
lower e
higher
E
the cutoff parameter changes the od
frequency at which high-frequency
response starts to fall off
The difference between filter resonance and cutoff
Although static filter settings are usefül, varying the filter setting dynamically over time
often produces more interesting effects. Modulating with velocity will produce brighter
sounds with louder dynamics, thus giving a sound more like an acoustic instrument.
Modulating with an envelope can create a particular change in harmonic structure,
such as the increase in harmonics that happens when blowing more wind into a wind
or brass instrument.
Also, remember that when using negative modulation, the filter cutoff should be set to
the upper limit of the intended range, since increased modulation will drive the filter to
a lower cutoff frequency.
Modulating the filter with the keyboard is also useful since it correlates the cutoff fre-
quency to the note being played on the keyboard. With 0 modulation amount, the filter
cutoff tracks the keyboard pitch. Thus, if you have a certain harmonic structure when
you play one key, playing a different key will shift the filter frequency to maintain the
same harmonic structure.
With negative tracking, the cutoff will change at a less than normal rate as you play
higher on the keyboard. This is ideal for bass patches since the lower notes should
have more highs, and the high notes should be more muted.
With positive tracking, the filter cutoff will increase at a faster rate than pitch as you
play higher up on the keyboard. This works well when you want the lower notes to be
muted and the higher notes to really "cut."
Note: Filter and DCA settings can interact. For example, the filter cutoff can be so
low that no signal can get through. Also, if the DCA is set for a short decay, then you
won't hear a long filter decay because the volume will reach zero before the filter
decay finishes (see the following figure).
3.6