How to use autotune on audio files in Audacity through a free plug-in Chrissy MontelliDec 19, 2020, 03:59 IST You'll need a plug-in to use autotune in Audacity.Halfpoint Images/Getty Images You can enable autotune in Audacity by installing the GSnap plug-in. GSnap is a free Audacity plug-in that can help you autotune your audio files. GSnap can be used with Audacity on Windows, macOS, and Linux devices. To install GSnap, you'll just need to copy its file into Audacity's "Plug-Ins" folder, and then enable it in Audacity. If you've ever needed to correct a song's pitch or tuning in Audacity, you might be surprised to realize there isn't an autotune feature bundled with Audacity's many default audio effects.