Using Filters - Korg Kronos Operation Manual

Using Filters

The filters allows you to diminish or emphasize
specified frequency areas of the sound.
The tone of the sound will depend significantly on the
filter settings.
The basic filter settings, including the routing, type,
cutoff frequency, and resonance, are set on the P3:
Filter page.
Filter Routing
Each oscillator has two filters, Filter A and Filter B. The
Routing parameter controls whether one or both of the
filters are used, and if both are used, it controls how
they are connected to each other.
The Single routing uses only Filter A as a single 2‐pole,
12dB/octave filter (6dB for Band Pass and Band Reject).
The Serial routing uses both Filter A and Filter B. The
oscillator first goes through Filter A, and then the
output of Filter A is processed through Filter B.
Parallel also uses both Filter A and Filter B. The
oscillator feeds both filters directly, and the outputs of
the two filters are then summed together.
The 24dB/4‐pole routing merges both filters to create a
single 4‐pole, 24dB/octave filter (12dB for Band Pass
and Band Reject). In comparison to Single, this option
produces a sharper roll‐off beyond the cutoff
frequency, as well as a slightly more delicate
resonance. Many classic analog synths used this
general type of filter.
Serial and Parallel Routing
Oscillator Filter A (Low Pass)
Filter A (Low Pass)
Oscillator
Filter B (High Pass)
Filter Types
This selects the parts of the sound which will be
affected by the filter, as described below. With the
Serial and Parallel routings, you can independently set
the types for Filter A and Filter B.
The filters will produce very different results
depending on the selected filter type. The selections
will change slightly according to the selected Filter
Routing, to show the correct cutoff slope in dB per
octave.
Low Pass. This cuts out the parts of the sound which
are higher than the cutoff frequency. Low Pass is the
most common type of filter, and is used to make bright
timbres sound darker.
High Pass. This cuts out the parts of the sound which
are lower than the cutoff frequency. You can use this to
make timbres sound thinner or more buzzy.
Band Pass. This cuts out all parts of the sound, both
highs and lows, except for the region around the cutoff
frequency. Since this filter cuts out both high and low
frequencies, its effect can change dramatically
depending on the cutoff setting and the oscillator's
multisample.
With low resonance settings, you can use the Band
Pass filter to create telephone or vintage phonograph
sounds. With higher resonance settings, it can create
buzzy or nasal timbres.
Band Reject. This filter type–also called a notch filter–
cuts only the parts of the sound directly around the
cutoff frequency. Try modulating the cutoff with an
LFO to create phaser‐like effects.
Filter B (High Pass)
Detailed Program Editing Using Filters
49