Elektron ANALOG KEYS Full Reference Manual page 93

FILTERS
In the FILTERS page, settings that will affect the two track filters are found.
FILTERS
FRQ (Filter1 Frequency) sets the cutoff frequency of Filter 1, the
4-pole lowpass transistor ladder filter.
RES (Filter1 Resonance) sets the resonance of Filter 1.
Increased resonance introduces a peak in the spectrum at the
cutoff frequency. By design, Filter 1 has a stronger resonance in
the higher frequencies, which gives a characteristic electronic fil-
ter sound when the resonance starts sharp and then falls during
a falling filter envelope.
OVR (Filter1 Overdrive) introduces distortion in the signal path.
In mid position (0) the signal is kept clean. Increasing positive
values gives a clipping distortion after Filter 1. Increasing nega-
tive values also distorts the signal, but with a softer overdrive
inside the filter.
TRK (Filter1 Keytrack) lets the cutoff frequency follow the pitch of
the sound. A setting of 32 will make the filter track the oscillator
frequency in note intervals, making it possible to play the Filter 1
resonance the same way as an oscillator is played.
DEP (Filter1 EnvF Depth) sets the amount of cutoff frequency
modulation from the filter envelope EnvF. The knob is bipolar
(both negative and positive modulation depth is possible). Note
that ENV always affects Filter1, regardless of which modulation
destinations are chosen.
FRQ (Filter2 Frequency) sets the cutoff frequency of Filter 2,
which is the 2-pole multimode filter located after Filter 1 and
Overdrive.
RES (Filter2 Resonance) sets the resonance of Filter 2.
Increased resonance introduces a peak in the spectrum at the
cutoff frequency. (Except for the Bandstop filter type, which has a
notch instead of a peak. This notch is widest at the lowest Reso-
nance setting.) Compared to Filter 1, Filter 2 has a more uniform
resonance behavior over the whole audio spectrum.
TYP (Filter2 Type) selects the filter type of Filter 2. Seven types
are available: 2-pole Lowpass, 1-pole Lowpass, Bandpass, 1-
pole Highpass, 2-pole Highpass, Bandstop, and Peak. Techni-
cally all of them are 2-pole filters with resonance, but the "1-pole"
types have a flatter spectrum like simple 1-pole filters and can be
very useful also for equalizer duties.
TRK (Filter2 Keytrack) lets the cutoff frequency follow the pitch of
the sound. A setting of 32 will make the filter track the oscillator
frequency in note intervals.
DEP (Filter2 EnvF Depth) sets the amount of cutoff frequency
modulation from the filter envelope EnvF. The knob is bipolar
(both negative and positive modulation depth is possible). Note
that ENV always affects Filter2, regardless of which modulation
destinations are chosen.
A-3
Appendix A: SYNTH TRACK PARAMETERS