Klevgrand Altitude Harmony is a simplified version of Klevgrand's Altitude vocal processor, made together with Focusrite. It tunes a vocal to the scale you choose and stacks up to three harmony voices above or below it.
Four main controls do most of the work. Style moves the tuning from natural to hard-tuned and changes how human the harmonies sound. Harmonies sets the number and direction of the extra voices. A correction switch and Pitch knob let you use it as a harmonizer only or shift every voice. Clones, Droid, Vibrato and Tremolo add one-button effects to all voices at once. A low-latency mode runs at zero latency for tracking and live use.
It costs $29.99 at its intro price, from $49.99. Karanyi Voicemax adds a fourth harmony voice and piano-roll editing for €59, and Waves Tune Real-Time is the established live tuner. Our Altitude Harmony first look compares them.