User Manual

doepfer
System A - 100
ADSR A-140
3
3. Controls
The ADSR puts out a varying voltage, called an enve-
lope, whenever a gate signal is sensed (see Fig. 1).
Fig. 1: An ADSR envelope and its parameters
1 A
With this control you set the envelope’s attack time.
Whenever the envelope is triggered - via the internal
gate, a ‘note on’ command via a MIDI/CV interface, or
a gate signal at gate input 1 - a control voltage is
output at sockets
3
and
4
, rising to maximum in the
time set by this control.
2 D
This control sets the decay time: the time it takes for
the control voltage output to fall to the level set by S,
the sustain control.
3 S
This control sets the sustain level of the envelope -
the steady-state voltage level after the decay phase.
This level remains the same until the gate is closed.
4 R
This control sets the release time of the envelope. As
soon as the gate signal finishes, for instance when the
key that triggered the envelope is released, or a note
off command is received via a MIDI/CV interface, the
control voltage falls to zero, at a rate set by this
control.
Sustain
Level
Attack
Time
Decay
Time
Release
Time
+3 ... +12
V
0
V
On
Off
Time
➨
approx. +8 V