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.
$20.00*
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*Price sourced from Amazon.com. Last updated:Jun 04, 2026.Price and availability are subject to change.
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Overview
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
Pros & Cons
👍 Pros
- Built-in polarity switch eliminates guesswork and ensures compatibility with any keyboard brand
- Non-slip rubber bottom and footpad keep the pedal firmly in place on hard floors and stage surfaces
- 5-foot hardwired cable provides adequate reach without needing an extension
- Compact, lightweight design at under 1 pound makes it easy to transport in a gig bag
- Fast-acting mechanism provides immediate sustain on/off response with no noticeable delay
👎 Cons
- Plastic housing feels less durable than metal-bodied sustain pedals intended for heavy stage use
- Does not support half-pedal or continuous sustain for nuanced piano expression
- Hardwired cable cannot be replaced if damaged, requiring replacement of the entire pedal
- 5-foot cable length may be too short for larger stage setups where the controller is far from the pedal
- Lightweight build can shift on carpet surfaces despite the non-slip pad
Frequently Asked Questions
Will this pedal work with my keyboard even if I don't know the polarity it requires?
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.
Does this pedal feel like a real piano sustain pedal?
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.
Is the cable detachable or replaceable?
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.
Can this pedal be used as a footswitch for guitar amps or effects units?
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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