In1995, the ih introduced the “ih Interactive Vocal Harmony” feature that allowed for creation of vocal harmonies based on the input from a microphone, starting from chords played live in Style mode, or recorded in a Song’s track. KORG IH Interactive Vocal Harmony Specs: - Max. number of voices: 4 - Input note range: C2-C6 - Microphone input: XLR balanced - Outputs: 2 x quarter-inch unbalanced - Sampling: 16-bit linear, 31.25kHz - Frequency response: 30Hz to 11.5kHz +0.5/-3.0dB (processing) - Signal to noise ratio: 90dB - Power Supply: External, 12V DC, 300mA