M-Audio SP-2 Universal Piano Sustain Pedal — Editorial Review
The M-Audio SP-2 is one of the highest-volume sustain pedals on Amazon — a universal-polarity 1/4" piano-style sustain pedal designed to work with virtually any MIDI keyboard, digital piano, or stage synth. Per M-Audio's official SP-2 product page, the pedal features a metal piano-style chassis with rubber-coated shell, chrome foot plate, 6-foot detachable 1/4" cable, switchable polarity for cross-brand compatibility, and a rubber non-slip bottom to keep the pedal in place during performance.
What the SP-2 Specifically Does Right
The SP-2's distinguishing feature is the polarity switch that toggles between normally-open and normally-closed sustain behavior, accommodating both major sustain-pedal standards used across the keyboard industry. Yamaha and Roland keyboards use opposite polarity from each other, and an incorrectly-polarized sustain pedal causes the inverted behavior (notes sustain when pedal is up, mute when pressed). The polarity switch on the SP-2 prevents this common cross-brand-keyboard frustration without requiring a separate pedal per keyboard.
Per M-Audio's product page, the pedal also supports half-pedaling — a feature MIDI keyboards with continuous-controller sustain input use to deliver partial sustain effects (releasing notes more slowly rather than abruptly). This is a real expressive feature for pianists transitioning from acoustic to digital instruments, where half-pedaling on the acoustic side is part of advanced technique.
Build Quality & Use
Per Gearspace community user-review consensus, the SP-2's metal piano-style construction holds up under regular use better than smaller box-style sustain pedals (the Casio SP-3 / Yamaha FC5-class budget tier). The 6-foot cable provides enough length to position the pedal naturally relative to the keyboard stand or piano bench. The rubber non-slip bottom is functionally important for stage use where the pedal sits on smooth flooring — sustain pedals that walk under foot pressure are a real frustration during performance.
Per M-Audio's Support Documentation
M-Audio publishes a dedicated SP-2 troubleshooting guide covering the most common user issues: keyboard polarity mismatch (resolved via the polarity switch on the SP-2), keyboard sustain input not detecting press / release, and the rare squeak that some users report under sustained use (often resolved by lubricating the hinge mechanism). The fact that M-Audio maintains dedicated SP-2 support documentation is a useful signal for buyers — the product has institutional support beyond initial purchase.
Where the SP-2 Specifically Fits
- MIDI keyboard performers and producers needing reliable sustain on any keyboard brand — the polarity switch eliminates the cross-brand compatibility problem
- Digital piano players who want piano-style sustain feel (vs the smaller box-style budget pedals)
- Stage performers who need the rubber-bottom non-slip behavior that prevents the pedal from walking during energetic performance
- Music students and beginners whose budget includes a starter keyboard + sustain pedal kit; the SP-2 is the standard upgrade from the bundled box-style pedal
- Studios with multiple MIDI keyboard brands needing one sustain pedal that works across all of them
Honest Limits Buyers Should Know
- Single sustain pedal — not a multi-pedal piano unit. Acoustic pianos have three pedals (sustain, sostenuto, una corda). The SP-2 is sustain-only. Pianists wanting all three pedal functions on a digital piano need a dedicated three-pedal unit (Korg PU-2, Roland RPU-3, Yamaha LP-1 family) rather than the SP-2
- Half-pedaling support depends on the keyboard. The SP-2 sends the signal; the keyboard's sustain firmware must support continuous-controller sustain. Most modern MIDI keyboards do; older or budget keyboards may have only on/off sustain detection
- Quality has reportedly varied over production runs. Per user reviews, some buyers report durability issues (squeaking, occasional sustain failures) while others use the pedal for years without complaint. The price tier suggests treating it as a consumable accessory rather than a 20-year investment piece
- 1/4" TS connector only — no MIDI / USB / wireless. The SP-2 is purely an analog momentary-switch pedal sending a 1/4" TS signal. Wireless sustain functions or MIDI-controlled sustain require completely different categories of hardware
- Not appropriate for organ workflows. Hammond organ players need a swell pedal (continuous expression control), not a sustain pedal. The SP-2 is a sustain pedal only
Where Buyers Should Look Elsewhere
- Three-pedal piano units (sustain + sostenuto + una corda) → Korg PU-2, Roland RPU-3, Yamaha LP-1 / LP-5, Casio SP-34
- Premium sustain pedal feel → Yamaha FC3 / FC3A (the standard reference for half-pedal-capable Yamaha workflows), Roland DP-10
- Expression / swell pedal for organ / synth → Yamaha FC7, Roland EV-5, Korg EXP-2 — continuous expression controllers, not on/off sustain
- Wireless sustain for performance → no major manufacturer ships wireless sustain pedals at consumer tier as of 2026; pro performers use long XLR cables and dedicated pedal-trigger systems
Sources & Citations
- M-Audio, "SP-2 Professional Piano Style Pedal product page," m-audio.com (accessed 2026-05-18)
- M-Audio Support, "M-Audio SP-2 Troubleshooting," support.m-audio.com (accessed 2026-05-18)
- Gearspace, "Pro-audio community user-review forum coverage," gearspace.com (accessed 2026-05-18)
Last verified: 2026-05-18
