Gordius JackBox User Manual

THE JACKBOX

User Manual v.1

Contents

The JackBox hardware ............................................................................................................................. 2

Adding the JackBox to your rig ................................................................................................................ 3

Why would I need a JackBox ? ................................................................................................................ 5

What exactly does the JackBox do? ........................................................................................................ 6

How do I calibrate expression pedals connected to the JackBox ? ......................................................... 7

Advanced expression pedal functionality ............................................................................................... 8

The expression pedal commands: an overview .................................................................................. 8

Changing the expression pedal range or sweep style ......................................................................... 9

Using one expression pedal to control multiple devices .................................................................. 10

Modifying the expression pedal behavior ......................................................................................... 10

Blocking expression pedal messages ................................................................................................. 11

Global expression pedal setup .......................................................................................................... 12

Dynamic expression pedal behavior ................................................................................................. 12

1

The JackBox hardware

1. stereo jack input for expression pedal (*)

2. stereo jack input for expression pedal (*)

3. stereo jack input for expression pedal (*)

4. stereo jack input for expression pedal (*)

5. 7-pins MIDI input. Connect it to the 7-pins MIDI connector of the FCB1010 (**)

6. 7-pins MIDI output. Connect it to the 7-pins MIDI connector of the TinyBox4Kemper

(*) The expression pedals need to have standard wiring, as depicted below. The resistor value of the
internal potentiometer is not important, the auto-calibration circuit of the JackBox is compatible with
a wide range of potmeter resistances. Also the type of potmeter (logarithmic or linear) is not
important, since the TinyBox digital processing allows you to choose a sweep curve which adapts the
expression pedal potmeter behavior.

(**) The 7-pins cable transfers MIDI to and from FCB1010, along with FCB1010 phantom power. For
plug-and-play compatibility the FCB1010 needs to be equipped with a “Single Cable Kit” (available at

http://shop.tinybox.rocks ) which makes the FCB1010 phantom powered and gives it the same 7-pins

MIDI connector for connection with the TinyBox4Kemper.

The JackBox can also be used without an FCB1010. In that case just leave the MIDI IN connector open.

The JackBox takes power from the TinyBox4Kemper through the JackBox MIDI OUT connector

2

Adding the JackBox to your rig

The JackBox allows you to turn up to 4 regular expression pedals into advanced continuous MIDI
controllers. The MIDI stream of the JackBox can be seamlessly merged with the UnO4Kemper MIDI
stream coming from the FCB1010, by connecting the FCB1010 to the JackBox as depicted below, using
a short 7-pin MIDI cable (this type of cable can be optionally ordered along with the JackBox).

Adding the JackBox to an FCB1010 equipped setup

3