Table of Contents
Advertisement
Env Jack
The Env jack outputs the envelope. The level (amplitude) is attenuated by the
Env. Level slider.
Env
Env. Level Slider
The Env. Level slider attenuates the envelope output on the Env jack. When
the slider is at the bottommost position, the Env jack will output 0V. In the
topmost position, the Env. jack will output an envelope between 0V and 10V.
The light on the Env. Level slider indicates the amplitude of the envelope on the
jack.
Note that the slider does not effect the envelope going to the internal VCA. If, for
example, the Env jack is patched to a modulation input on an external module
Env. Level
while audio is running through the VCA, the slider can be used to control the
amount of modulation without changing the audio level.
EOR Output Jack and LED
The EOR jack outputs a gate that goes high when the rise stage ends, which is
when the fall stage begins. The gate remains high as long as the envelope is
falling and goes low when the envelope completes. The jack will stay low when
EOR
the envelope is not running, and the light will shine orange when the EOR output
is high.
Audio
Audio In and Out Jacks
The Audio In and Out jacks are the input and output of the VCA. The envelope
output (pre-level slider) is internally routed to the CV input of the VCA. When the
envelope is stopped or at 0V, the Out jack will output silence. As the envelope
In
Out
rises, the signal will get louder until it becomes as loud as the input signal at the
peak of the envelope. As the envelope falls, the signal will fade back to silence.
Trigger Jack
The Trigger jack requires a trigger of at least 2V to start an envelope. If there is
no envelope in progress, then a trigger will initiate a single complete envelope. If
Trigger
the envelope is rising when a trigger is received, then the trigger is ignored
(unless the RETRIG jumper is installed, see below). If the envelope is falling
when a trigger is received, it will begin rising from its current voltage.
On the back of the module is a RETRIG jumper. When this jumper is installed,
the envelope will immediately jump to 0V and start rising any time a trigger is
received. This can cause a click on the VCA output, so the jumper is not
installed at the factory.
Follow Jack
The Follow jack is the input of a slew limiter, and can also be used for complex
envelope generation, exotic audio filtering, and envelope following.
Follow
Whenever the internal envelope is not triggered or cycling, the envelope output
will rise or fall in order to match the voltage level present on the Follow jack.
However, the rate of rise and fall times is limited by the positions of the Rise/Fall
sliders and the CV amounts. That is, the envelope output will try to "follow" the
signal present on the Follow jack, but it can only rise and fall as fast as the
envelope would rise/fall if it were to be triggered. Since "slew" is the rate of
change, we call this "slew limiting".
Slew limiting can be used to create complex envelopes (ASR, ADSR, etc) by
timing the signal on the Follow and Trigger jacks. See Fundamentals of the
Follow Jack on page 9 for more information.
Page
4
of
12
Advertisement
Table of Contents
