env/0/exp
These 2 toggle switches define how the envelope follower and expression input are controlling rate
and range respectively (follow the little black arrow to see what switch controls what parameter)
- Set to
0
, only the respective knob is active. Exp and envelope have no effect on the given parameter.
- Set to
exp
, the parameter will be controlled by the expression input. In this scenario the actual knob
(rate or range) serves to scale the range of the expression input. (setting its maximum value)
- Set to
env
, the chosen parameter will receive the signal from the envelope follower. Again here, the
actual knob serves to scale the effect of the envelope signal. (setting its maximum value)
EXP input
Can be used to externally control the rate or range. When an expression pedal is connected, the rate
pot can be used to define the max setting of the expression pedal.
Most commercially available expression pedals based on a potentiometer and using a TRS plug
should work. The value is not really critical, although I would not go lower than 10k.
Some examples are the Moog EP-2, Roland EV-5, and M-Audio EX-P.
You need to use
TRS (Stereo)
plugs and cables.
NO MONO PLUGS OR CABLES!
These will short
out the voltage regulators inside the pedal and damage it.
Here is how such a TRS plug looks like.
The exp jack is connected to the pedal like this:
sleeve : ground
ring: 5V supply voltage
tip: controlling (varying) pin
If you really know what you are doing you can actually use a control voltage instead of a
resistance based controller. But you need to consider the connections and never exceed 5V. If
you do you might damage the pedal.
Use a TRS plug. No Mono plug. TRS, NOT mono :)
If you have any doubt when deciding what to connect to the expression input please send me
an email and I will verify that everything is safe.
