Expression Pedals
Expression pedals and controllers let you sweep parameters on your favourite effects in real time, just like a wah pedal but for any control you choose. They are ideal for controlling filter cutoff, delay time, mix level, reverb depth and more. In our Expression Pedals category you will find the compact Old Blood Noise Endeavors Expression Slider portable TRS fader and the versatile Catalinbread CB Tap, which doubles as an external tap-tempo controller for compatible pedals.
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Expression Pedals – Frequently Asked Questions
What does an expression pedal do?
An expression pedal sends a changing control voltage to another pedal, moving one of its parameters as you move the pedal or slider. This might be filter cutoff on a modulation pedal, delay feedback on a delay, or drive level on an overdrive. Instead of setting a knob and leaving it, expression control lets you morph sounds as you play, opening up more dynamic and performance-based effects.
What is the difference between a full-size expression pedal and a slider?
Traditional expression pedals look and feel like a wah, operated with your foot. Slider-based controllers such as the Old Blood Noise Endeavors Expression Slider use a small fader you move by hand. A slider is ideal if you want precise, set-and-forget positions or quick tweaks from a mic stand or desk, while a full-size pedal suits continuous sweeps and live performance underfoot.
Will my expression pedal work with all effects?
Most modern pedals that support expression use a standard TRS wiring and a particular resistance range, but there are variations. The OBNE Expression Slider is designed to work with a wide range of devices from brands like EarthQuaker Devices, Meris, Empress and more. It is still worth checking your pedal’s manual to confirm compatibility and any required settings.
What can I control with expression on my board?
Common uses include controlling the filter frequency on pedals such as the Old Blood Noise Endeavors Float Dual Moving Filter, adjusting delay time or modulation depth on multi-effects like the Alexander Neo series, or sweeping a resonant filter on drives such as the Spaceman Polaris. Many modern pedals have an expression input specifically to unlock these kinds of evolving sounds.
Do I need power for an expression pedal?
Most passive expression pedals and sliders, including the OBNE Expression Slider, do not require power – they simply vary resistance or send a passive control voltage. Some more complex controllers and MIDI expression devices may need power for additional features, LEDs or switching, so always check the individual product requirements.
