ADSRjr &
Expander
User Manual
ADSRjr Description
The ADSRjr is an envelope generator with many features. Standard gate input
jack is normalled to the Doepfer bus gate signal. Three time ranges cover times
from tiny to huge. Linear or expo curves are jumper selectable. A cycle button
creates continuous waves.
The expansion module brings out a metric boatload of features: CV control of
each segment, trigger button and jack, buttons replace the linear/expo jumpers,
end of attach, decay and release outputs, and an inverted output.
ADSRjr Features:
Gate jack normalled to Doepfer bus gate signal
Time range selections: short, medium, long
Linear or exponential curve jumper selectable for each segment
Cycle button for continuous operation
Convenient output jack
4HP, depth=53mm
Expansion Features:
CV control of each segment
Buttons for selecting linear or exponential curves
Trigger button and input
End of attack, decay, and release outputs
Inverted output jack
4HP, depth = 26mm
Both modules are 4HP. The ADSRjr module has a maximum 20mA current
draw.
Front Panel Interface:
ADSRjr
Gate: Standard gate input. Normalled to the Doepfer gate signal with a jumper to
defeat.
Time: Button to set the time range. Green=fast, orange=medium, red=slow.
A: Attack time.
D: Decay time.
S: Sustain level.
R: Release time.
Cycl: Cycle mode button. Puts module in continuous cycling.
Out: Convenient output jack.
Front Panel Interface:
Expander
A: Attack time CV input.
D: Decay time CV input.
S: Sustain level CV input.
R: Release time CV input.
A Curve: Sets the curve for the attack segment. Out=linear, in=exponential.
D Curve: Sets the curve for the decay segment. Out=linear, in=exponential.
R Curve: Sets the curve for the release segment. Out=linear, in=exponential.
Trig Button: Manual trigger button. Fires off one full ADSR cycle.
Trig Jack: Manual trigger button. Fires off one full ADSR cycle for every trigger.
EOA: End of attack output trigger.
EOD: End of decay output trigger.
EOR: End of release output trigger.
Inv Out: Inverted output jack.
Connector locations -- ADSRjr
Level jumper
Power connector
5 volt source jumper
Doepfer Bus gate
Expansion
connector
Curve jumpers
Pull for expo
NO POWER HERE!!!
disable jumper
Connector locations -- Expander
Expansion
connector
NO POWER HERE!!!
Setup & Installation
Install power
To install you ADSRjr, first set up the jumpers.
“Time” jumpers: A bit misnamed, as they are used to set the desired curves. An installed jumper
sets that segment for exponential, removing the jumper sets the segment for linear. Each segment
has its own jumper, and can be set independently from the others. For example, a linear attack
and expo decay and release. Ships with all three jumpers installed.
Gate jumper: Routes the Doepfer bus gate signal to the gate jack. Remove to disable. Ships with
Doepfer bus enabled.
+5V jumper: Sets the source of the 5 volts used internally in the module. Ships in the +12V
position to derive 5 volts from the +12 volt supply. If your case has the 5 volt rail powered you can
move the jumper to the “Buss” position to offload the +12 volt supply.
“Pull for 8V”: Another misnomer. Module ships with 0-5V output range. For 0-10V range, remove
this jumper.
Now you can attach the power cable as shown, making sure the red stripe is in the correct
position, and install the module in your case.
cable thusly
Expander Installation
Attach
Remove
To install you ADSRjr expander, first attach the expander cable as shown. Be sure to remove the
three “Time” jumpers as they are replaced by buttons on the expander.
Module Width 4HP (20mm)
Module Depth 53mm
Power Connector Standard Doepfer 16 pin
Power Requirements ± 12 Volts at 20mA Max
Input Impedance 20K Ohms
Output Short circuit protected
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