Korg At2 May 2026

At the time of its release, the AT2 faced competition from the Peterson StroboStomp (guitar pedal) and the Boss TU-series.

| Feature | Korg AT2 | Peterson StroboStomp | Boss TU-2/TU-3 | | :--- | :--- | :--- | :--- | | Accuracy | ±0.1 cents | ±0.1 cents | ±1 cent | | Form Factor | Desktop/Floor | Pedal only | Pedal only | | Temperaments | 15 (incl. User) | 50+ (with presets) | 1 (Equal) | | Sound Out Mode | Yes (Built-in speaker) | No | No | | Built-in Mic | Yes | No | No | korg at2

Verdict: The Boss is bombproof for rock, but inaccurate for acoustic ensembles. The Peterson is arguably more powerful (strobe visualization), but the AT2 wins on utility. You can hand the AT2 to a singer, a flutist, and a bassist in the same session without needing adapters. The Peterson requires a pedalboard; the AT2 sits on a piano lid. At the time of its release, the AT2

| User Type | Recommendation | |-----------|----------------| | Night owl pianist in an apartment | ✅ Excellent choice (if you find one used) | | Teacher wanting to transpose on the fly | ✅ Very useful for vocal accompaniment | | Conservatory student needing MIDI practice | ✅ Great for using with apps like PianoTeq | | Casual player who rarely uses headphones | ❌ Overkill – buy a digital piano instead | | Owner of a spinet or drop-action upright | ❌ Likely incompatible | from guitars and basses to saxophones

The Korg AT-2 is a professional-grade, compact chromatic tuner. Unlike standard guitar tuners that are limited to specific notes (E, A, D, G, B, E), a chromatic tuner like the AT-2 can identify any of the 12 notes of the chromatic scale. This makes it compatible with virtually any instrument, from guitars and basses to saxophones, violins, and instruments with alternate tunings.

While Korg has released many tuners over the years, the AT-2 (and its successors in the AT series) is revered for its needle-style meter accuracy packed into a stomp-box-sized chassis.