Korg CA-1 Chromatic Tuner The CA-1 is a full featured chromatic tuner in a convenient ultra-compact body. The "Tilt-Slit" design allows the CA-1 to quickly adopt an upright stance for easy viewing. A guitar-style input is provided, as well as a built-in microphone. The LCD display features an easy-to-read analog-style needle, with additional Sharp and Flat LED indicators. Ideal for Orchestral and Brass Band instruments, the CA-1 features indicators for musically pure Major and Minor thirds, broad tuning detection and a wide calibration range. The Sound Out mode provides an audio reference tune for tuning by ear.