Note: I assume you meant the (Aircraft Wind/AT series), as there is no standalone "Korg AT2." If you meant the AT-12 (or a different model), please clarify, but the AW-AT2 is Korg’s most popular wind/brass tuner.
The (Auto Tuner-2) is a vintage, high-quality chromatic instrument tuner manufactured in Japan. Known for its durability and precision, it was designed to help musicians accurately tune various instruments, including guitars, basses, violins, and even harpsichords. Key Technical Specifications korg at2
The technical brilliance of the AT-2 lay in its "Auto Chromatic" capability. In an era where many affordable tuners required the user to manually switch between notes (E, A, D, G, B, E), the AT-2’s internal circuitry could automatically detect the pitch being played across the full chromatic scale. This allowed for the tuning of non-standard instruments—harps, brass, and woodwinds—without requiring the player to have a deep theoretical knowledge of hertz frequencies. It featured a built-in microphone for acoustic instruments and a 1/4-inch jack for electric guitars, making it a universal tool for the bedroom hobbyist and the studio session player alike. AW-AT2 Note: I assume you meant the (Aircraft