Arturia CS-80V User Manual page 24

Start by reducing the cut-off frequency of the low-pass filter (LPF). This will make the
sound more muted.
For this set the linear green LPF knob.
Note that the filter cut-off frequency is modulated by an ADR envelope (Attack, Decay
and Release).
To really hear the effect from the ADR envelope on the filter cut-off frequency,
increase the value for the resonance («ResL»). This will amplify the filtering effect
and the sound will start to make the cutoff frequency more pronounced, producing a
«whistle» effect.
Change the length of attack for this envelope («A») so that the brilliance increases
slower or faster when a note is played.
In the same manner, change the value for the decay («D»). The brilliance will also
decrease faster or slower while you are holding the note.
You have probably noticed that a different envelope can also modulate the amplitude of
the sound (VCA)
Increase the attack time («A») so that the volume of the sound progressively
increases.
Do the same thing with the Release («R»); the volume will progressively decrease
when you release the note.
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ARTURIA – CS-80V – USER'S MANUAL
Set the cut-off frequency
The parameters of the filter envelope
The ADSR envelope controllers