User Manual

NN-XT SAMPLER
(RECORD+REASON)
685
Filter controls
The following filter controls are available:
•Freq
This is used for setting the filter cutoff frequency. The cutoff frequency determines the limit above or below which
frequencies will be cut off depending on the selected filter type. In the case of a lowpass filter for example, fre-
quencies below the cutoff frequency will be allowed to pass through, while frequencies above it will be cut off. The
farther to the right you turn the knob, the higher the cutoff frequency will be.
q It is very common to modulate filter frequency with the modulation envelope, as described in “The Modulation
Envelope”.
•Res
Technically, this knob controls feedback of the output signal from the filter, back to its input. Acoustically it empha-
sizes frequencies around the cutoff frequency. For a lowpass filter for example, increasing Res will make the
sound increasingly more hollow until the sound starts “ringing”. If you set a high value for the Res parameter and
then vary the filter frequency, this will produce a classic synthesizer filter sweep.
For the notch and bandpass filter types, the Resonance setting instead adjusts the width of the band. That is, the
higher the resonance setting, the narrower the band will be where frequencies are cut off (notch) or let through
(Bandpass).
•K. Track
This lets you activate and control keyboard tracking of the filter frequency. If keyboard tracking is activated, the set
cutoff frequency of the filter will change according to the notes you play on your keyboard. That is, if you play notes
higher up on the keyboard, the filter frequency will be raised and vice versa.
When the knob is set to its center position, filter frequency is adjusted so that the harmonic content remains con-
stant across the keyboard.
Keyboard tracking is deactivated by default (the knob all the way to the left). This means that the filter frequency
will remain unchanged regardless of where on the keyboard you play.
The Modulation Envelope
The Modulation Envelope parameters let you control how certain parameters, or destinations, should change over
time - from the moment a note is struck to the moment it is released again.
The destinations you can use are:
•Pitch
• Filter frequency