Pitchproof
Pitchproof can shift the pitch of the input.
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. 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.
On the bottom there are some other options. You can choose mono, for lower CPU usage, or stereo for stereo inputs. . If you have a strong attack to your input it will clearly preserve that better, but if you have a fade in to notes, like a pad it won’t have a noticeable effect.
It’s got a guitar tuner!
Visit: Pitchproof