Empress Effects Tremolo2 - Manual (Page 6)

Control Port
The control port jack allows the Empress Tremolo
2
to be controlled
by a multitude of devices. The pedal ships configured to accept an
expression pedal. Please see the "Advanced Configuration" section
on how to configure the control port for the device you want to use.
Control Voltage (CV)
With CV control, the Empress Tremolo
2
responds to CV signals from
0 to 5 volts. Otherwise, the CV configuration works exactly like the
expression pedal configuration.
External Tap Switch
The Empress Tremolo
2
can be used with an external switch. In tap
tempo mode, both the pedal's "tap|preset" stompswitch and the
external switch control the tap tempo. In knob mode, the external
switch isn't utilized. In preset mode, the pedal's "tap|preset"
stompswitch toggles through presets, the external switch controls
tap tempo, and the "rate | ratio" knob controls the ratio.