User's Manual

6. HPF AND VCF FILTERS, VCA, AND ENVELOPES
Once the oscillators have generated the sound, and have been balanced by the SOURCE
MIX control, they now proceed through the filter section and the final amplifier section,
which typically use envelopes to shape the dynamics of the sound over time.
6.1. HPF (High Pass Filter)
This is a non-resonant -6 dB per octave high-pass filter. It gently eliminates low frequencies
below its cutoff frequency, while letting high frequencies pass through. It is very useful to
remove bass frequencies of a pad sound for example.
At its lowest setting, it has no effect, because its cutoff frequency is at 5 Hz, below the range
of human hearing: everything passes through. Double-click the fader to set it to this default
"let all frequencies pass" setting.
The sound will become thinner the higher the HPF CUT control is. At its maximum, the HPF
crossover point is almost 2 kHz and lower frequencies are made softer at the rate of 6
decibels per octave. Five octaves lower (63 Hz) for example, will be cut by 30 dB.
This is a real-time analysis graph of noise going through
the HPF with its CUT set to about 400 Hz
39 Arturia - User Manual Jup-8 V4 - HPF and VCF Filters, VCA, and Envelopes