Waldorf 2-Pole - Manual (Page 31)

Appendix
31 2-pole Analog Filter User´s Manual
pass, all others are dampened. A band stop filter does
just the opposite, i.e. it dampens only the frequencies
around the cutoff frequency. The most common type is
the low pass filter.
Filter Cutoff Frequency
The filter cutoff frequency is a significant factor for filters.
A low pass filter dampens the portion of the signal that
lies above this frequency. Frequencies below this value
are allowed to pass through without being processed.
High Pass Filter
A high pass filter dampens all frequencies below its
cutoff frequency. Frequencies above the cutoff point are
not affected.
LFO
LFO is an acronym for low-frequency oscillator. The LFO
generates a periodic oscillation at a low frequency and
features variable waveshapes. Similar to an envelope, an
LFO can be used to modulate a sound-shaping compo-
nent.
Low Pass Filter
Synthesizers are often equipped with a low pass filter. A
low pass filter dampens all frequencies above its cutoff
frequency. Frequencies below the cutoff point are not
affected.
Modulation
A modulation influences or changes a sound-shaping
component via a modulation source. Modulation sources
include envelopes, LFOs or MIDI messages. The modula-
tion destination is sound-shaping component such as a
filter or a VCA.
Overdrive
An Overdrive distorts the input signal by amplifying it
drastically and clipping the resulting signal to a certain
output level. Overdrive effects produce "warm" overtones
at quieter volumes and harsher distortion, as gain is in-
creased.
Rectifier
A rectifier is an electrical circuit that converts a ground
centered, positive and negative audio waveform to a
positive only waveform.