Mod Duo - MOD Duo Control Chain Integration; Understanding Control Chain Devices

Control Chain devices
Control Chain is an open standard developed by MOD Devices that defines a
communication protocol, electrical specification, cables and connectors. It's used to
interconnect external controllers, such as expression pedals and footswitch extensions, to
the MOD Duo.
Compared to MIDI, Control Chain is a lot more powerful. For example, instead of using
hard-coded values like MIDI does (0 to 127), Control Chain has what is called a device
descriptor, and its assignment (or mapping) message contains the full information about the
parameter being assigned, like parameter name, absolute value, range and any other data.
Having all that information on the device’s side allows developers to create powerful
peripherals that can, for example, show the absolute parameter value on a display or use
different LED colors to indicate specific states.
The Control Chain devices are connected to the MOD Duo using a regular Ethernet cable
and they have two connectors, which allows an extra external controller to be connected,
thus creating a chain. The MOD Duo provides power to the devices via the Ethernet cable.
27