The PaintAudio EXP/SW CAPTIAN is a Multi-Function Expression Pedal & Footswitch to MIDI Controller Box: a small converter that sits between the expression pedals and footswitches you already own and the audio software on your computer or mobile device. It converts analog expression pedal movement into MIDI CC messages and turns switch presses into MIDI control signals, sending everything over USB-MIDI1.
What it does for a player
The idea is simple: instead of buying a dedicated MIDI expression pedal or MIDI foot controller, you plug a standard expression pedal or a plain footswitch into the CAPTIAN, and it converts what you play into MIDI. PaintAudio says it works with any third-party expression pedal, though the maker recommends its own FootCaption series, such as the PaintAudio Foot Captain or the PaintAudio Foot Captain Expression Pedal1.
That makes it useful with software instruments and effects on a computer or tablet, where a parameter like delay time, reverb mix or a synth's filter can be swept from a hardware expression pedal, and where song sections or effects can be triggered from a footswitch.
Inputs and compatibility
The box has two input channels, and each one can take either an expression or a switch input, freely combined1.
- Standard expression pedals1
- Expression pedals with switch outputs1
- Any 1-button or 2-button footswitch1
Expression pedals come in different wiring schemes. PaintAudio states the CAPTIAN is configurable to support typical Tip-output or Ring-output expression pedals, which the maker says makes it compatible with almost all third-party pedals1. If a pedal is not responding, the Tip/Ring configuration is the first thing to check.
Setup and configuration
All features can be configured directly on the unit, with no computer or mobile device needed for setup1. The computer or tablet only enters the picture as the thing receiving the USB-MIDI output.
PaintAudio also makes the PDF version of the latest manual available for download on the product page. The maker notes that because the device's firmware is continuously updated, manual descriptions may sometimes differ from actual device operation1.
Build and size
The CAPTIAN is built with a robust metal casing, and PaintAudio describes it as compact and lightweight: 99x97x51 mm and 255 g1. That is small enough to sit on a pedalboard or desk next to the pedal feeding it.


