User's Manual

6.2. VCF (Voltage Controlled Filter)
This is an emulation of the original Jupiter-8 filter, a major factor of the JUP-8 V4's sound. It
is a resonant low-pass filter (LPF) with a switchable slope of -12 or -24 dB per octave; these
slopes are much steeper than the slope of the HPF. At -24 dB, when the cutoff frequency is
set around middle A, low A will be less than half as loud, and the octave below that will be
almost inaudible. Its filtering is more powerful than most loudspeaker crossover networks.
• CUT (VCF): This fader sets the cutoff frequency of the filter. The range is from 19
Hz (at the bottom, where almost all sound will be cut off) to 7334 Hz (where the
filter is wide open and has little effect).
• RES: This sets the resonance of the filter. The resonance amplifies the
frequencies near the cutoff frequency. At the bottom, the filter is not resonant.
As you increase the RES fader, the filter will become more selective (its peak
will become narrower). At extreme settings, the sound will eventually almost
“whistle” as the filter begins to self- oscillate.
• SLOPE: Switch the filtering slope to -12 or -24 dB/ octave.
• MOD: This fader sets how much the filter will be modulated (opened or closed)
by one of the the ADSR envelopes, as determined by...
A graph of the frequency curve of the VCF with a CUT of
500 Hz, RES high and SLOPE set to -24 per octave
Arturia - User Manual Jup-8 V4 - HPF and VCF Filters, VCA, and Envelopes 40