Itspitch correction module is efficient and easy to use, earning Graillon 2 the number one spot on the autotune freebie list. It is compatible with all digital audio workstations on Windows and macOS.
The developer recently released an updated version of Graillon 2. It features a resizable user interface (you can set it to any size between 75% and 200%), increasing compatibility with different screen sizes.
This free autotune effect is flexible and easy to operate, with adjustable speed, range, scale, and depth. The added stereo widening feature can be helpful in a vocal processing chain, but double-check your mix in mono when using it.
Aside from those few drawbacks, MAutoPitch is a brilliant free autotune VST that could quickly become your go-to pitch correction tool. Like Graillon 2, it is compatible with all PC and Mac VST and AU plugin hosts.
GSnap is an old freeware autotune plugin. It was the first free autotune VST on the market. Pitch correction software was still somewhat of a rarity back in the day when GSnap was released.
Regarding its features and design, GSnap is still a fantastic pitch correction tool. At first look, it looks pretty similar to Graillon 2 and MAutoPitch. One excellent feature that sets it apart is the ability to tune the processed audio signal according to the MIDI notes on the input.
Unlike Graillon 2 and MAutoPitch, GSnap will only work on Windows-based systems. It does come with a very well-written manual, though. The instructions are worth reading if you want to use GSnap as your go-to free autotune effect.
Although Voloco is available as a VST3 and AU plugin on desktop operating systems, it is primarily used on iOS and Android. The app version of Voloco is easily the best free autotune for mobile devices.
Although more of a pitch shifter than a pitch correction plugin, another interesting vocal processing tool is the excellent Little AlterBoy by Soundtoys. For complete control over the pitch correction process, try using Waves Tune.
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