FREE · HARMONIZER · VST3 / AU
A free harmonizer that already knows your key.
Stacking harmonies by hand means singing or tuning every part. SCRAMBLE's HARMONY adds pitch-shifted layers a 3rd, 5th or octave away, and keeps them in the key it hears in your track. One vocal becomes a stack; one synth line becomes chords.
Hear it.
Real loops through real VOCAL TEXTURE presets, nothing else added. Tap DRY to hear the original.
Want to hear it on your own loop? Load it into SCRAMBLE in your browser.
Harmonizer plugins vs SCRAMBLE.
| HARMONIZER PLUGINS | SCRAMBLE. | |
|---|---|---|
| Layers in key (3rd / 5th / octave) | ✓ | ✓ (MORE FX: HARMONY) |
| Key detection | Some | ✓ |
| Play harmonies from MIDI | Some | – |
| Separate level + pan per voice | ✓ | – |
| Tune, vocoder, delay, reverb too | – | ✓ |
| Price | $50 to $200+ | Free · Bundle $49 |
Gross Beat, ShaperBox and RC-20 Retro Color are trademarks of their owners (Image-Line, Cableguys, XLN Audio). SCRAMBLE isn't affiliated with them. Prices are their regular list prices, Oct 2026.
One voice in, a stack out.
HARMONY
Up to three pitch-shifted layers in key.
Key detection
SCRAMBLE names the key of the track and follows it.
TUNE
Tighten the lead first in VOCAL CHAIN mode.
Space
Delay and reverb glue the stack together.
When a dedicated harmonizer is the better pick
- You want to pick each harmony note from MIDI and mix each voice separately.
We'd rather you use the right tool. If that's Harmonizer plugins, go for it.
How to get the sound.
- Put SCRAMBLE on a vocal or melody and pick MORE FX.
- Open ADD HARMONY or twist until HARMONY lights up.
- Drag the bar to bring the layers up under the lead.
SCRAMBLE is out now, and it's free.
All 8 FX modes, the full cube, the sequencer and 237 presets. Mac + Windows, no card needed.
Questions
How do I get the HARMONY sound fast?
Pick MORE FX and open the ADD HARMONY preset folder: 12 presets where HARMONY is the main effect (3 are in the free version, all 12 in the Bundle). Then twist the cube for more, and drag HARMONY's bar in WHAT'S LIT to set how hard it hits.
Is it free?
Yes. All 8 FX modes, the cube, the sequencer and 237 presets are free, no time limit. The $49 Bundle adds all 2,800 presets plus the full vocal chain.
Does it work on synths too?
Yes. Any melodic part: vocals, keys, guitar, synth lines.
Does it work on Mac and Windows?
Yes. Mac gets VST3 and AU (Apple Silicon and Intel). Windows gets VST3 plus a standalone app. It loads in FL Studio, Ableton Live, Logic Pro and other DAWs. Not Pro Tools yet (no AAX).