Repitch

Repitch, a polyphonic MIDI-controlled pitch shifter, is a piece of software that will transform any audio you input into a pitch-changed version of itself. The pitch is calculated based on the settings you input into the app. It goes without saying that if your chosen setting matches the pitch of your original audio, it will be in tune and there will be no actual pitch effect.

The interface is simple enough. You've got the main turn knob that can alter between Note and Hertz pitch editing mode, as well as four sliders on the bottom of the window that control the envelope (the nuance or level of your chosen pitch) and are as follows: Attack, Decay, Sustain and Release. Playing with these will yield different results. You'll be the judge, and depending on what your aim is you might or might not be happy with the result.

The best part is that for individuals looking to automate the pitch effect, that can be done via a DAW, or digital audio workstation. This could especially be helpful for DJs and people trying to process a tune simultaneously in more than one way. Repitch can manage on its own, provided it has a series of exact instructions to follow.