User's Manual

5.3. VCO-1 Controls
• RANGE: Sets the frequency of VCO-1 to one of four octaves 16', 8', 4', 2'. (The
octaves are indicated in feet, referring to the length of the pipes of pipe organs; a
4-foot pipe sounds an octave higher than an 8-foot pipe). Double-click the control
to set it to the default of 8' (middle C = middle C).
• WAVE: Sets the oscillator to generate one of four waveforms:
◦ Triangle
◦ Saw Tooth
◦ Rectangle or Pulse (the pulse width of this waveform is set by the
PWM fader)
◦ Square
• CROSS: This fader sends the signal of VCO-2 "across" to cross-modulate VCO-1.
When VCO-2 is in LOW mode, it causes subsonic frequency modulation (vibrato);
in NORM mode, it causes audio rate frequency modulation. See CROSS [p.38].
5.4. VCO-2 Controls
• RANGE: Adjusts the frequency range for VCO-2 continuously in semitones from
-12 (marked as the 16' setting) to +24 (marked as the 2' setting). For example, if
RANGE is set to 7 semitones, when VCO-1 is sounding a middle C, VCO-2 will
sound a middle G.
• NORM/LOW switch: In the NORM position, VCO-2 generates audible frequencies
according to the keys being played. In the LOW position, it becomes a low-
frequency oscillator that does not respond to the keyboard, so you can use it as
an LFO to modulate the frequency of VCO-1.
• FINE TUNE: Knob to fine tune VCO-2's pitch in a range of plus or minus one
semitone.
• WAVE: Sets VCO-2 to generate one of four waveforms:
◦ Sine
◦ Saw Tooth
◦ Rectangle or Pulse (the pulse width of this waveform is set by the
PWM fader)
◦ Noise (White noise in NORM, Pink noise in LOW)
5.4.1. Noise waveform
The noise waveform adds an interesting complement to the sonic possibilities. It is very
useful to create breath effects (flute tones for example) or special effects like the sound of
wind. Unlike all other waveforms, this is a fixed generator; it doesn't change its output no
matter what key is played or what the RANGE setting is.
It IS affected by the NORM/LOW switch. In the NORM position, it generates white noise,
which has lots of high-end "hiss" because it adds all frequencies in the audible spectrum
together, and there are more high frequencies than low frequencies. In the LOW position, it
generates pink noise, which is more of a "roaring jet" sound because it has equal energy in
every octave of the spectrum.
Arturia - User Manual Jup-8 V4 - VCOs 34