AIR Music Technology AIR Vocal FX Collection (ESD); effect bundle; includes AIR Doubler, AIR Vocal Tuner, AIR Vocal Distortion and AIR Vocal Harmonizer; functions: automatic pitch correction, creation of up to 4-part harmonies, distortion and saturation for vocals, doubling with up to 8 additional voices; optimized for Apple Silicon; enhanced DAW compatibility; additional features: mono effect versions, preset change indicator