The pitch graph.
Draws both lines as you sing: dashed coral for your voice, solid teal for the output. Scroll to move through the range; double-click to follow the singer again.
SnapTune 1.2 for Mac and Windows
Hard-tune. Live. Free.
A pitch correction plugin that snaps your voice to the key with 2.7 ms of delay, so you hear it tuned while you record.
Mac: VST3 and Audio Unit · macOS 11 or later · Apple silicon and Intel · Windows: VST3 · Windows 10 or later, 64-bit · Tested in FL Studio
A synthesized singer, off-key on purpose, over chords in C major.
SnapTunev1.2
Latency46.2 ms
Pitch range the detector
listens for
listens for
SnapTune's own engine, ported line by line from the plugin's C++ and running in your browser. Turn the knobs while it plays.
See what it's doing
Coral is what you sang.
Teal is what comes out.
Every part of SnapTune speaks the same two colours, so you can tell at a glance whether it grabbed the right note.
The gauge.
You sang −40¢ flat. What comes out is 0¢. Readable from across the room.
Retune Speed.
All the way to 0 ms is the robotic stair-step. Turn it up and your slides and vibrato come back.
Scale notes.
Lit notes are allowed. Click one to switch it off and the voice will never land there.
Two modes
Track it. Then mix it.
Switch any time. SnapTune tells your DAW the new delay.
Live
2.7 ms
of delay
- Use it when you're recording and want to hear yourself tuned.
- Trade-off: big jumps (following MIDI, say) shift your voice's character a little.
Studio
46 ms
compensated by your DAW
- Use it when you're mixing a recorded take.
- In exchange: your voice keeps its character, and Formant works.
Either mode uses under 1 % CPU on a MacBook Pro M5.
Quick start
Your first vocal in five settings.
The presets only touch the correction knobs. Key, scale and voice are up to you.
- 1Put SnapTune on the vocal's mixer track, not the beat or the master.
- 2Set Key and Scale to the song. Don't know the key? Pick Chromatic.
- 3Pick a preset: Hard Tune for the robot, Melodic Trap for tight modern vocals, Natural if nobody should notice.
- 4Set Voice to the singer. Deep voice: Low Male.
- 5Use Live while you record and Studio when you mix.
MIDI notes
Write the melody. The voice follows.
Hold a note on a MIDI track and SnapTune tunes the vocal to that note, in any octave, instead of the nearest one in the scale. Let go and it goes back to the scale.
- 1In SnapTune's wrapper (gear icon), set MIDI input port to a free number.
- 2Add a MIDI Out channel on the same port.
- 3Draw the melody in its piano roll and turn on MIDI notes in SnapTune.
Install
Up and running in a minute.
An installer puts everything in place. The system asks once before opening it, and I'm working on getting rid of that.
Mac
Step 1
Open the installer
It installs the VST3, the Audio Unit and a standalone app.
Step 2
Let macOS open it
macOS blocks it the first time. Click Done, then System Settings › Privacy & Security › Open Anyway. On macOS 14 or earlier, right-click it and choose Open.
Step 3
Restart your DAW and rescan
Quit it completely first. In FL Studio: Options › Manage plugins › Find installed plugins.
Windows
SnapTune-1.2.0-Windows-Setup.exe
Step 1
Run the installer
It installs the VST3 in Common Files\VST3, plus a standalone app.
Step 2
Get past SmartScreen
If Windows says it protected your PC, click More info › Run anyway.
Step 3
Restart your DAW and rescan
Close it completely first. In FL Studio: Options › Manage plugins › Find installed plugins.
Rather copy the files yourself? Each release also has a zip with an INSTALL.txt.
Help get rid of the warning.
macOS asks you to click Open Anyway because SnapTune isn't notarized by Apple. Notarizing needs an Apple Developer membership, which costs $99 a year. Once that's covered, the installer opens like any other Mac app.
Chip in on Ko-fiQuestions.
Is it actually free?
Yes. It's open source under the AGPL-3.0 license. No trial, no watermark, no account.
It isn't doing anything to my vocal.
It needs the vocal on its own track. On a full mix or a beat it can't find a single pitch to follow. If the voice is breathy or the room is echoey, raise Tracking. For deep voices, set Voice to Low Male.
macOS says the installer can't be opened.
That's the missing Apple notarization, not a broken file. Click Done, then go to System Settings › Privacy & Security and click Open Anyway (on macOS 14 or earlier, right-click the installer and choose Open). Installed the zip by hand instead? INSTALL.txt inside it has the one Terminal command you need.
Windows says it protected my PC.
That's SmartScreen: the installer isn't code-signed yet. Click More info, then Run anyway.
Does it work in Ableton, Logic, Reaper…?
It's tested in FL Studio, and every build passes Apple's own Audio Unit validation. Other DAWs that load VST3 or AU should work, but I haven't tried each one. If yours gives you trouble, open an issue and say which DAW and version.
Is this Auto-Tune?
No. Auto-Tune Pro costs hundreds of dollars or a monthly subscription; SnapTune is free and has no connection to Antares, who own the Auto-Tune trademark. It uses published techniques: YIN pitch detection and pitch-synchronous grain resynthesis. The README explains how each part works.