8. Synthesis basics: Subtractive synthesis NORD MODULAR V3.0
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will “instantly” (in the case of the Nord Modular envelop generators: 0.5 ms) reach full level. If the attack
is raised it will take longer to reach maximum level. If you for example have an envelope controlling vol-
ume, raising the attack will give the sound a “softer” character. If you have the envelope routed to the
filter, it might give the sound a “wah” type of start.
After the envelope has reached full level, it starts to fall back again. How long this should take, is set with
the Decay parameter.
The level of the envelope does not necessarily have to fall all the way back to zero at the end of the decay.
Instead, the ADSR-envelope has a Sustain setting used to determine the level the envelope should rest at,
after the decay. If you for example want to create a flute sound, you would have a fairly high sustain set-
ting on your volume envelope, since a flute tone basically stays at a steady level for as long as you play it.
Attack
(time)
Key Down
Level
Time
Attack
(time)
Decay
(time)
Key Down
Level
Time
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