Source Audio DUAL EXPRESSION PEDAL SA161 - DUAL CONTROLLER EXPRESSION PEDAL

An Expression Pedal Designed to Unlock the Full Potential of Modern Effects

With the rise of digital and hybrid pedals (delay, reverb, modulation, filters, pitch, multi-effects), the expression pedal has become much more than an accessory: it's a true performance tool. The Source Audio Dual Expression follows this logic by offering a dual output approach, designed for musicians who want to move beyond simple "on/off" control to continuous and musical expression: opening a filter, extending feedback, adjusting a reverb mix, or evolving multiple parameters simultaneously.

Its value is especially clear within the Source Audio ecosystem, thanks to the sensor output compatible with Soundblox, but it remains equally relevant in a versatile pedalboard as soon as your effects accept a TRS expression input.

Who Is the Source Audio Dual Expression For, and Which Styles Does It Enhance?

This pedal is aimed at guitarists (and more broadly instrumentalists) who want to play with parameters rather than set them once and for all. It suits both intermediate and advanced musicians: easy to integrate, yet flexible enough for advanced uses.

In rock and blues, it enables volume swells, gain or tone variations, and very expressive "breath" effects. In ambient and post-rock, it becomes a tool for sonic staging: reverb build-up, filter opening, modulation morphing. In the studio, it helps capture natural automations during tracking, while in live settings, it ensures instant and reproducible control without interrupting playing.

Controls, Outputs, and Integration: A Pedal Designed to Control Multiple Pedals

The heart of the Source Audio Dual Expression is its ability to manage two isolated TRS outputs. Practically, you can control two pedals with a single expression pedal, maintaining clean operation within a dense pedalboard. The " Range Control Adjust " setting allows you to adapt the control range sent to both outputs: useful to avoid too abrupt a travel, to limit a sensitive zone, or to tailor the response exactly to your playing style (fine dosing at the start of the travel, or progressive rise to maximum).

The connectivity is optimized to cover multiple scenarios. OUTPUT 1 sends the signal either via a 6.35mm TRS Jack or via the Soundblox 3.5mm TRRS Jack connector. OUTPUT 2 sends only via the 6.35mm TRS Jack. The result: you can combine a Source Audio Soundblox effect and another expression-compatible pedal, or two TRS expression pedals, depending on your needs.

Sound Quality

An expression pedal does not color the sound like an overdrive or delay: its "sound" is the quality of control it provides. Here, the goal is a progressive and manageable feel, so that every foot movement translates into a musical variation rather than an abrupt change. Properly adjusted, the Dual Expression enables very natural transitions: clean swells, reverb mix evolutions without pumping, and parameter variations precise enough to remain usable on stage.

The real benefit is felt when you link your playing to the effect: you don't "change presets," you make your sound breathe. It's this expressive dimension that transforms an expression-compatible pedal into a full-fledged instrument.

Technical specifications

Effects	Volume / Expression	Use	electric guitar
Format	Pedal	Color	Black

Two isolated TRS outputs	simultaneous control possible on multiple pedals	OUTPUT 1	transmits via 6.35mm TRS Jack or 3.5mm TRRS Soundblox Jack connector
Sensor output	4-wire output compatible with all Soundblox, Soundblox 2, or Soundblox Pro pedals	OUTPUT 2	transmits only via 6.35mm TRS Jack
"Range Control Adjust "	control range adjustment affecting both outputs