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Action Filter 4
EN
Can a band pass through the filter or will it be rejected?
What happens if you combine a high- and lowpass filter? There are two possi-
bilities: a serial or a parallel routing - one after the other or both next to each
other.
In series, high- and lowpass form a so-called bandpass. In the
Action Filter 4
, a
highpass will first remove lower frequencies. From here the signal is send into a
lowpass, where higher frequencies are processed.
INPUT
FILTER A: Highpass
OUTPUT
FILTER B: Lowpass
Serial combination of high- and lowpass filter
What remains is a frequency band of a certain width which is specified by both
CUTOFF
controls. By likewise moving both
CUTOFF
s to the left or right, this
band is moved across the frequency spectrum.
CUTOFF
Highpass
CUTOFF
Lowpass
LEVEL
FREQ.
Bandpass filter: the green area is being passed through the filter whereas the red area is rejected.
The
Action Filter 4
allows independent control for the high- and lowpass filter
and therefore a free bandwidth by adjusting both
CUTOFF
controls to different
values. In addition, the filters’ resonance controls can be set individually and
therefore create different enhancements at the lower and upper cutoff-fre-
quencies. This particular feature of the
Action Filter 4
allows creation of sounds
not possible using typical bandpass filters with a fixed width.
Summary of Contents for action filter 4
Page 1: ...Bedienungsanleitung User Guide...
Page 19: ...18...
