Intelligent real-time harmony for every instrument.
Three plugins. One engine. Infinite voicings.
EFFECT
THIRI VOICE
Sing a melody, hear up to 5 harmony voices in real time. Formant-preserving pitch shift with humanization, vowel shaping, and breath control.
INSTRUMENT
THIRI KEYS
Play single notes on any MIDI controller. THIRI adds jazz voicings, drop-2 inversions, and tension notes from your chord chart automatically.
MIDI FX
THIRI SEQ
Feed a monophonic MIDI line and get harmonized MIDI output. Scale-aware voice leading with configurable direction and voicing styles.
No install. No sign-up. Just sing.