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Alesis ASP1 MKII Universal Sustain Pedal Footswitch — main product image
Alesis ASP1 MKII Universal Sustain Pedal Footswitch
Alesis ASP1 MKII Universal Sustain Pedal Footswitch
Alesis ASP1 MKII Universal Sustain Pedal Footswitch
Alesis ASP1 MKII Universal Sustain Pedal Footswitch
Alesis ASP1 MKII Universal Sustain Pedal Footswitch
Alesis ASP1 MKII Universal Sustain Pedal Footswitch
Alesis

Alesis ASP1 MKII Universal Sustain Pedal Footswitch

The Alesis ASP1 MKII sustain pedal delivers universal compatibility and reliable response for keyboards, synths, and MIDI controllers.

$21.99*
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*Price sourced from Amazon.com. Last updated:Oct 25, 2026.Price and availability are subject to change — details.

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Overview

The Alesis ASP1 MKII is a universal sustain pedal and momentary footswitch designed to add expressive sustain control to electronic keyboards, digital pianos, synthesizers, and MIDI controllers. Its defining feature is the built-in polarity switch, which allows instant compatibility with instruments from any manufacturer — simply flip the switch to match your device's polarity requirement, and the pedal is ready to use. The fast-acting internal mechanism responds immediately to foot pressure, registering sustain on and off without perceptible lag, making it suitable for both practice sessions and live performance.

Built for portability, the ASP1 MKII weighs just 0.79 pounds and measures a compact 4.11 x 3.21 x 1.1 inches, slipping easily into a keyboard bag or gig case. The sturdy non-slip rubber base and textured footpad keep the pedal anchored during play, minimizing unwanted movement on smooth surfaces. A 5-foot hardwired cable with a standard 1/4-inch (6.35mm) plug connects directly to any sustain or momentary footswitch input, requiring no adapters or additional accessories. While the plastic body keeps weight and cost down, it delivers dependable everyday performance for musicians who need a simple, universal sustain solution without the expense of a premium piano-style pedal.

Key Features

Portable and compact sustain pedal / momentary footswitch expands the expressive control of Electric Keyboards, Pianos, Synthesizers, MIDI Controllers and more

Flip the Polarity switch for universal compatibility with any instrument with a 1/4-inch sustain or momentary footswitch input for versatile control

Sturdy non-slip bottom and footpad keeps the pedal secured in place delivering a reliable performance every time - ideal from the stage to the studio

Equipped with a fast-acting, durable mechanism to deliver an immediate response

5-foot (1.5m) hardwired cable with 1/4-inch (6.35mm) plug is ready to go, for straight out-of-the-box use

Specifications

Brand
Alesis
Model
ASP1 MKII
Type
Universal Sustain Pedal / Momentary Footswitch
Compatibility
Electric Keyboards, Pianos, Synthesizers, MIDI Controllers
Polarity
Switchable (Normally Open / Normally Closed)
Cable Length
5 feet (1.5m), Hardwired
Connector
1/4-inch (6.35mm) Plug
Base
Non-slip Rubber Bottom and Footpad
Material
Plastic / Rubber
Color
Black
Dimensions
4.11 x 3.21 x 1.1 inches
Weight
0.79 Pounds

Frequently Asked Questions

Yes. The ASP1 MKII has a built-in polarity switch that lets you toggle between normally open and normally closed operation, ensuring compatibility with virtually any keyboard or MIDI controller that accepts a 1/4-inch sustain input.
The ASP1 MKII uses a momentary on/off switch mechanism rather than a continuous (half-pedal) design, so it functions as a simple press-and-release sustain control. It does not offer the graduated response of a weighted piano-style pedal.
No. The 5-foot (1.5m) cable is hardwired directly into the pedal with a 1/4-inch plug on the other end. It cannot be detached or replaced independently.
It can work as a momentary footswitch for any device with a 1/4-inch footswitch input, including some guitar amps and multi-effects units. However, verify that your device uses a momentary (not latching) footswitch before purchasing.

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