CLAVIA DMI AB CLAVIA NORD Stage 2 EX 88 [46/101] Filter section

6. The Instruments: The Synth section Nord Stage EX v6.x

Page 44

The third Envelope mode, indicated by both LEDs, is similar to the first mode, except that the enve-

lope quickly goes to zero when the key is release.

FILTER SECTION

The filter is, together with the oscillators, the most important sound-shaping tool in a synthesizer. The

filter section in Nord Stage EX comprises a lowpass filter with either a 12dB or 24 dB slope, with

selectable keyboard tracking. The filter has adjustable resonance, and is self-oscillating at high reso-

nance settings. The filter cut-off frequency can be modulated by velocity or by the Mod Envelope.

ILTER FREQUENCY CUTOFF

With the FREQ knob you set the cutoff frequency. Simply put, if you turn the FREQ knob clockwise,

the high-frequency content in the signal will increase. This parameter can be Morph controlled.

LP F

ILTER

In the Nord Stage EX you can select between 12 dB/octave and 24 dB/octave (4-pole) slopes for the

low pass filter. Press S

HIFT and the 4 POLE button to switch type. The 4 POLE LED shows which

filter mode is selected.

DB (4-POLE)

This is the classic “synth filter” slope used in the Minimoog and Prophet-5 among others. It cuts out

frequencies rather drastically, 24 dB per octave. A 24 dB filter is also known as a 4-pole filter.

When you “open” a low-

pass filter, the high-fre-

quency content increases

in the output signal.

The figure shows the filter

with 24 dB and 12 dB

slopes.