User's Manual

Below is a simplified flow chart of how this all fits together “under the hood” of the JUP-8
V4.
4.3. VCOs generate the sound
When you press a key or keys, it tells the oscillators what basic pitches or notes to generate;
it also sends a trigger to the envelopes telling them to start their attack. The basic pitch of
each VCO can be modulated, if you want, by the LFO directly, or by the LFO when you
increase the MOD wheel (notice the two orange arrows pointing at the top of the VCOs).
The pitch can also be affected by ENV-1; a three-position switch determines whether VCO-1,
VCO-2, or both oscillators will be modulated
The output of the VCOs, after passing through a mixing knob that lets you set the balance
between VCO-1 and VCO-2, now proceeds to the HPF (High Pass Filter) that cuts the bass out
of the signal if desired. Unlike the VCF, the HPF can’t shut the audio off completely.

The HPF frequency can’t be modulated by the LFO or envelopes unless you’re using the Modulations
section of the Advanced Panel…more on that later.
Arturia - User Manual Jup-8 V4 - How Analog Synthesis Works 30