Correct and Shift Pitch in Realtime: INTONE, Low-latency Pitch-Shifting and Correction Algorithm

A flexible and transparent algorithm for monophonic sound sources.

Analysis
Music

INTONE is a formant-preserving, low-latency pitch-shifting and correction algorithm, designed to work in real time with monophonic vocal and instrumental recordings. INTONE is controlled by multiple parameters that enable a flexible palette of sonic results, including:

  • Natural-sounding pitch-correction that preserves expressive characteristics such as vibrato
  • Hyper-corrected ‘auto-tune’ pitch-shifting effect, made popular by artists including Cher and T-Pain
  • Per-semitone transposition for adjusting the key of already-recorded audio
  • Adding transposed layers to existing audio for easy harmonization