Since there are different ways to achieve harmonies (MIDI-controlled vs. Automatic), I have curated the best free options and how to use them.
Part of the MFreeFXBundle (Free Version) free vocal harmonizer plugin
Note: The free version does not support MIDI input for specific chords, so you have to manually set the semitone shift (e.g., +5, +7, -12). Since there are different ways to achieve harmonies
| Plugin | Key Features | Best For | |--------|--------------|-----------| | (Free "Elements" version) | 5 vocal effects modes (including "Polyvoice" for harmonies), real-time MIDI control, pitch correction, saturation | Full-featured, professional harmonies with creative effects | | GVST GHarmonizer V3 | Up to 4 harmony voices, pitch shift per voice (semitone & cent), pan & level controls, delay per voice, low CPU | Simple, reliable, classic pitch-shifting harmonizer | | Auburn Sounds Graillon 2 (Free edition) | Pitch tracking, real-time pitch shifting, throat length modeling, built-in pitch correction, up to 2 octaves shift | Live performance and natural-sounding harmonies | | Voxengo Harmonizer | 2 harmony voices, formant correction, adjustable delay and feedback, pitch detune, zero latency | Transparent, studio-quality harmonies | | Polyverse Music Manipulator (Free "Lite" version) | Real-time pitch & time manipulation, formant shifting, granular mode, MIDI controllable | Experimental and creative harmonies | | Plugin | Key Features | Best For