Specifications

6. The Instruments: The Synth section NORD STAGE Eighty Eight V1.1x
Page 40
F
ILTER
S
ECTION
The Filter section in Nord Stage comprises a lowpass filter with either a 12dB or 24 dB slope.
F
ILTER
F
REQUENCY
C
UTOFF
With the F
REQ 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 Nord Stage you can select between 12 dB/octave and 24 dB/octave (4-pole) slopes for the low pass filter.
Press S
HIFT
+ the 4 P
OLE button to switch type. The “4-Pole” LED shows which filter mode is selected.
24
D
B (4-P
OLE
)
This is the classic “synth filter” slope used in the Minimoog and Prophet-5 among others. It cuts out fre-
quencies rather drastically, 24 dB per octave. A 24 dB filter is also known as a 4-pole filter.
12
D
B
The 12 dB/octave slope leaves more harmonics than the 24dB variation discussed above. This type of filter
has been used in various early Oberheim synthesizers and others. A 12 dB filter is also known as a 2-pole
filter.
When you “open” a lowpass fil-
ter, the high-frequency content
increases in the output signal.
The figure shows the filter with
24 dB and 12 dB slopes.