EXT.TAP
— External Control
The EXT.TAP jack is an input for external control over the Prism II’s parameters. It has several operation modes:
●
Passive controller
(normally open momentary button). This mode precisely copies the functions of the TAP
footswitch and is active by default.
●
S-trigger
— “short circuit trigger”, analog trigger/gate with the same polarity as the pedal’s. This is the
recommended trigger type. Use the config file to select this operation mode. Two sub-modes are available:
○
The TAP footswitch retains its functions even when the clock signal is connected.
○
The TAP footswitch is only active in EX mode and can be used to access secondary control functions in any
mode; all of its other functions are transferred to the external clock source.
●
V-trigger
— “voltage trigger”/”positive trigger”, analog trigger/gate with polarity opposite to the pedal’s. If no
external signal is coming into the EXT.TAP input, the LED will light up, and some of the pedal’s functions will be
inactive. Those functions become active as soon as a clock signal is connected. Use the config file to select this
operation mode. Two sub-modes are available:
○
The TAP footswitch retains its functions even when the clock signal is connected.
○
The TAP footswitch is only active in EX mode and can be used to access secondary control functions in any
mode; all of its other functions are transferred to the external clock source.
Use this trigger type if you have no S-trigger source or if you prefer V-triggers for other reasons.
●
Full MIDI control
(Type A).
●
Favorite preset control
. Use a passive controller (a quick tap on a normally open button) or an S-trigger signal to
recall or exit the Favorite preset. To record a new Favorite preset, send an active Gate signal into the pedal or
hold down the external controller for over 3 seconds.
In order to sync LFO phase with the tempo of the song, make sure to press the ON footswitch on time. When the
pedal is engaged, LFO phase is reset to the initial values determined by the active patch.
The S-trigger mode is active by default due to its equally good response to passive and active control via the EXT.TAP
input. In order to switch external control mode to passive controller, V-trigger or MIDI, use the config file as described
further in this manual.
The passive and active (S-trig/V-trig) external control options assume full control over the TAP footswitch’s
functions, as determined by the global mode:
●
TP
: they set LFO rate (replacing the RATE knob).
●
RS
: they “press” the TAP footswitch to reset LFO phase.
●
EX
: they “hold down” the TAP footswitch as long as the Gate signal is active.
The active modes can work both with triggers and gates. Gate signals are crucial for expression pedal simulation
(the EX mode).
To connect a MIDI signal source, use a 6.3mm Type A stereo jack (TRS). The MIDI channel is set in the config file. In
MIDI mode, delay time is set by the last control you’ve interacted with (MIDI Clock, TIME knob or TAP footswitch).
The MIDI Start command can be used to reset the LFO externally.
The pedal is designed to be clocked in quarter notes with time between two control signals ranging from 0.005
seconds to 2 seconds. The lowest BPM is 30. The stable BPM range is 30 to 300. The accuracy depends on the
stability of the incoming clock signals.
