32 | NordLead4UserMaNUaLv1.3x
Filter Resonance
Filter Resonance is used to emphasize frequencies around the Filter
Frequency . If you are using a low pass filter, increasing resonance will
emphasize frequencies around the set Filter Frequency and de-empha-
size the rest of the frequency spectrum .
Further raising the Filter Resonance will make the sound resonant to a
point where the filter adds a ringing quality to the sound . Some of the
filters will even start to oscillate at high resonance settings .
Drive
Drive adds a distortion inside the filter with a range
that spans from gentle to quite rude .
Try the drive with high filter resonance set-
tings.
Envelope Amount (Env Amt)
Env Amt controls how much the Filter Envelope
should modulate the cutoff frequency . Positive and
negative settings are possible, the envelope can
open or close the filter . At the center detented 12
o’clock position, the modulation is zero .
Keyboard Tracking (KB Track)
Keyboard Tracking is used for adjusting the Filter
Frequency cut-off point depending on where in
the keyboard range you play .
This is related to basic acoustics; if you raise the pitch of a waveform,
the harmonics will also have their frequencies increased . If the filter cut-
off frequency is constant, the sound will be perceived as getting duller
the higher up the keyboard you play .
• With KB Track disabled, the Filter Frequency cutoff is fixed regardless
of where on the keyboard you play .
• With KB Track enabled, the Filter Frequency cutoff will be higher for
higher notes, and lower for lower notes . The point of reference is the
key of C2 .
• With KB Track at the 1/3 setting, the cutoff frequency will track the
keyboard in a 1:3 relationship, play one octave higher and the cutoff
frequency will move by 1/3 of an octave .
• With KB Track at the 2/3 setting, the cutoff frequency will track the
keyboard in a 2:3 relationship, play one octave higher and the cutoff
frequency will move by 2/3 of an octave .
• With KB Track at the maximum setting of 1, the cutoff frequency will
track the keyboard in a 1:1 relationship .
Filter Type
Select one of the seven available filter
types .
Low Pass 12, 24 & 48
Frequencies above the filter frequency setting will be attenuated . The
number indicates the slope, how steep the filter would become above
the filter frequency . A 24 dB filter has a steeper slope than a 12 dB, the
48 dB has the steepest slope .
Band Pass
A band pass filter lets frequencies at the filter frequency to pass, while
frequencies above and below the filter frequency will be attenuated .
Keyboard tracking (KB track)
freq
gain
Low pass 12, 24 & 48
Filter Frequency
48 dB
12 dB
24 dB
freq
gain
Band pass
Filter Frequency
freq
gain
Summary of Contents for Nord Lead 4
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