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7. Module reference: Envelope group
E E E E
N N N N V V V V E E E E L L L L O O O O P P P P E E E E O O O O U U U U T T T T P P P P U U U U T T T T
The blue control signal output from the envelope generator.
Signal: Unipolar.
O O O O
U U U U T T T T P P P P U U U U T T T T
The red output from the envelope controlled amplifter.
Signal: Bipolar.
M M M M
-E
-E
-E
-E
O O O O D D D D
N N N N V V V V
The Mod Envelope is an ADSR envelope with inputs to control attack, decay, sustain and release from
external sources.
A A A A
M M M M P P P P I I I I N N N N P P P P U U U U T T T T
A blue control signal input used for controlling the overall amplitude of the envelope.
G G G G
A A A A T T T T E E E E I I I I N N N N P P P P U U U U T T T T
A logic control signal input that is used to start and hold the envelope for as long as the logic signal is
high. A green LED indicates when a gate signal is received.
R R R R
E E E E T T T T R R R R I I I I G G G G I I I I N N N N P P P P U U U U T T T T
The envelope can be restarted with a logic signal at this input. Note that the envelope must receive a gate
signal at the gate input to be able to retrig.
A A A A
Sets the attack time. When the envelope receives a high logic signal at the Gate input, the output control
signal from the envelope rises up to the maximum output, +64 units. The time to get from 0 to +64 units
is the attack time. If the logic Gate signal drops to zero before the envelope has completed the attack stage,
it will skip the decay and sustain stages and immediately proceed with the release stage. The attack time
is displayed in milliseconds or seconds in the corresponding display box. Range: 0.5 ms to 45 s.
Note: A very short attack time can produce a click in the beginning of the sound. This is only normal
according to physics theory. To eliminate any click, just increase the attack time slightly.
D D D D
Sets the decay time. After the envelope has completed the attack part, it will drop down to the sustain
level with the decay time. The decay is exponential. If the sustain level is 64, the decay stage will not be
needed, there is simply nothing to decay down to. If the logic Gate signal drops to zero before the enve-
lope has completed the decay stage, it will immediately proceed with the release stage. The decay time is
displayed in milliseconds or seconds in the corresponding display box. Range: 0.5 ms to 45 s.
Page 132
NORD MODULAR V3.0
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