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The Pulsar-23 Notebook : Reference & Guide
2.8 Filters
Three of the four sound generators host a filter, each of which is a different
type. A filter is commonly found in subtractive synthesis as it generally
subtracts i.e. cuts, frequencies from the audio spectrum of the sound.
Human hearing operates in the 20Hz to 20KHz range and therefore this is
the typical range of a filter.
Pulsar-23 also uses filtering as part of the sound shaping and construction
of sounds for the Bass synth, Snare Drum and Hi Hat Drum. These help to
polarise the focus of the sound in the spectrum and avoids frequency
clashes with others in the mix. Pulsar-23 has resonant filters which when
‘Q’ is set high can generate audio through self oscillation.
NOTES
Sound Generators
2
Cutoff
Q
0%
20Hz
100%
20KHz
A
T
T
E
N
U
A
T
IO
N
FREQUENCY
LOW PASS FILTER
Rolls off frequencies at the cutoff point.
Frequencies below the cutoff pass through
unaffected. A boost in Q - Resonance can
be applied. Ideal for bass by reducing
higher frequencies.
Cutoff
Q
0%
20Hz
100%
20KHz
A
T
T
E
N
U
A
T
IO
N
FREQUENCY
BAND PASS FILTER
Rolls off frequencies at either side of the
cutoff point. Frequencies within the band
pass through unaffected. A boost in Q -
Resonance can be applied. Ideal for
polarising tone to defined frequencies.
Bass Synth
SD Snare Drum
HHT Hi Hats
Cutoff
Q
0%
20Hz
100%
20KHz
A
T
T
E
N
U
A
T
IO
N
FREQUENCY
HIGH PASS FILTER
Rolls off frequencies at the cutoff point.
Frequencies above the cutoff pass through
unaffected. A boost in Q - Resonance can
be applied. Ideal for focussing on shrill
sound like cymbals and hats by reducing
lower bass frequencies.
Summary of Contents for Pulsar-23
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Page 157: ...157 The Pulsar 23 Notebook Reference Guide Technique 8 Pulsar 23 Notes ...
Page 158: ...158 The Pulsar 23 Notebook Reference Guide Patch Name Technique 8 ...
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Page 172: ...172 The Pulsar 23 Notebook Reference Guide www synthdawg com Making RTFM Cool ...