"Pitchproof is an audio plug-in that can shift the pitch of the input. The effect is meant to combine old styles of pitch shifting with the quality you expect from modern plug-ins. The result is this pitch "pedal" simulation that has most of what is great about guitar harmonizer pedals, and still preserves the signal's integrity

The Blend control will let you use a fully shifted output, or the dry and wet signals mixed (a harmony). The Pitch menu lets you select pitches like +7 or -7, or harmonies which are intelligent pitch shift effects. These harmonizer effects are intended to be played in a certain major or minor scale. So selecting C (major that is) scale for Key, which doubles as Am (A minor), means you should play only the notes A, B, C, D, E, F, and G for the most harmonized results. Key is not important for non-harmony settings. Detune is good for getting a more natural effect, only a little is needed (a little up or down from the center position)."

Pitchproof is a free plug-in from Aegean Music, this is the full version.

Visit: aegeanmusic.com/pitchproof-specs