Waldorf AFB 16 User Manual - Basic Filter Parameters

Waldorf ROT Analog Filter Step Sequencer VST Plug-In

AFB16 User´s Manual

22

Basic Filter Parameters

These three parameters control the

global settings for the filters and VCA’s.

Cutoff and Resonance control the

filters, while Drive controls the VCA’s.

Cutoff                                                           

0...127

Selects the frequency above which the sound is

dampened by the filter. Turning this knob clockwise will

raise the cutoff frequency, “opening” the filter, and when

fully clockwise all frequencies will pass through

unfiltered. Turning the knob counter-clockwise will lower

the cutoff frequency “closing” the filter.

Resonance                                                   

0...127

Controls the emphasis of the frequencies around the

cutoff point. Lower values will give more “brilliance” to

the sound, and higher values give the sound a typical

analog filter character. When this setting is increased to

very high values, the filter will self-oscillate and generate

a pure sine wave.

Drive                                                             

0...127

This parameter sets the amount of drive added to the

signal by the VCA. A value of 0 does not boost the signal,

small values will add additional harmonics (providing a

warmer sound), and high levels of Drive will add full

analog distortion.

Filter Modes

In addition to the AFB16 hardware analog filters, the ROT

plug-in has three high-quality digital filter

types for even more power and flexibility.

The digital filters are completely processed

by the plug-in with the host CPU power,

and they do not reserve any of the analog

filters in the AFB16 hardware.

The following four filter modes are available in ROT:

 12/24 dB Low Pass Filter: This filter mode routes

the audio signal directly into the external AFB16 analog

filters.

 12/24 dB High Pass Filter: This digital filter is

useful for reducing the bass frequencies in an audio

signal. This filter can provide very interesting results when

used in combination with cutoff modulation. An example

of this would be to fade in a sound starting with its high

harmonics and continually evolve into its full sound.

Using

a high pass filter on percussion sounds (like hihats

or crash cymbals) allows you to cut any bass frequencies

and make them stand out more in a mix. When the filter