Waldorf Q+ User Manual Page 91

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Sound Parameters – Filter Types
Waldorf Q User’s Manual 92
Frequency
Level
Cutoff
Picture 30: Notch Filter Type
On Notch filter types, the Resonance parameter is almost useless by definition because the resonance
frequency is exactly the frequency that is blocked by the filter. However, you will still be able to hear
slight differences when you change the Resonance because of phase changes. Anyway, the effect isn’t
that spectacular.
Comb+ and Comb-
The Comb filter types differ from the other filter types greatly because they actually don’t damp any
part of the signal but add a delayed version of the input signal to the output. But what is a Comb
filter?
A Comb filter is basically a very short delay that can be controlled in length and feedback. The delay
time is so short that you can’t hear its individual taps but a colorization of the original signal created
by peaks or holes in the frequency spectrum. The frequency of the colorization is set by the delay
length which is controlled in the Q through Cutoff while the amount of colorization is set by the
Comb filter feedback, which is controlled in the Q through Resonance.
Frequency
Level
Cutoff determines number of teeth
Resonance
Picture 31: Comb + Filter Type
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