GSnap
Filed Under: VST Effects/Pitch Correction | report broken link
GSnap is an auto-tune effect. It can be used subtly to correct the pitch of a vocal, or, with more extreme settings, to create a robot-voice effect. It requires a monophonic input signal to operate.

VisualVox
Filed Under: VST Effects/Pitch Correction | report broken link
VisualVox VST is a free intonation correction VST Plugin. With it you can
- shift notes of a voice recording to perfect intonation
- fit a voice recording into rythm by stretching, cutting and moving parts of it
- fit a voice recording to another key with minimal pitch changes
- produce a perfect vibrato
- visualize how right or wrong you are singing
- create artificial polyphony from single voice recording
- draw frequency curves freely with your mouse
- let the VST plugin improve intonation automatically
- play your voice like an instrument via your Midi Keyboard
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