We put the same song through NiceVois, LALAL.AI and UVR, and published every result below so you can listen for yourself.
Listen
Start with the song, then compare one part at a time. Within each part, the waveforms follow the same moment, so switching tools plays the same bar. Click any waveform to jump. Headphones make the differences much easier to hear.
The song
Lead vocal
Listen for harmonies left underneath the lead, and for gaps where the lead drops out.
Backing vocals
Listen for pieces of the lead left behind, and for harmonies that went missing.
Instrumental
Listen for traces of the voice left in the music, and for music that sounds thin or watery.
What we heard
NiceVois. One lead file stays separate from the harmonies. The backing download combines two separated backing layers, also available individually in the tool. Listen especially through the chorus, where several vocal parts overlap.
LALAL.AI. The lead is very close to ours, just a little wider, with a touch more of the doubled parts left in. The backing vocals are the cleanest of the three: almost nothing of the band gets through. They also sound a little softer and less bright than the other two. In the first few seconds, it treats part of the vocal as backing where the other two keep it in the lead.
UVR. Its backing file goes completely silent whenever nobody is singing, which is tidy. The lead is where it struggles on this song. It cuts in and out, and from about 1:30 to 1:55 much of the lead ends up in the backing file instead. It also leaves more of the harmonies in the lead. UVR has many models to choose from, and a different pair might do better on this song.
Instrumentals. LALAL.AI’s is the cleanest: we found practically no voice left in it. UVR’s is close behind, with nothing you can hear. Ours is clean from about ten seconds in, but a very faint trace of the voice is left in the opening seconds.
Summary
The three versions place overlapping voices differently. Listen to the lead and backing through the chorus, then choose the result that fits your song. UVR is free and works offline; NiceVois and LALAL.AI run in the browser. One song is not a verdict.
NiceVois made this page, and this is only one song, so trust your ears over our words.
How we tested
- The same file went into all three. LALAL.AI and UVR were tested on 18 September 2026; their files are unchanged. NiceVois was updated on 27 October 2026 with the new lead/back method.
- NiceVois: BS-RoFormer, Frazer/Becruily with the stereo-width step off, then UNMIXX on the backing only. The backing player combines its two backing layers.
- LALAL.AI: the Lead & Back Vocal Splitter, downloaded as MP3.
- UVR (Ultimate Vocal Remover): the same two steps as its Vocal Splitter. BS-Roformer-Viperx-1297 takes the vocals out of the song, then the Karaoke MelBand Roformer by aufr33 and viperx splits them into lead and backing. Both are in UVR’s own model list. We don’t have the UVR app installed, so we ran those model files with audio-separator, a free, open-source tool that runs UVR’s models.
- Nothing was touched afterwards. No volume changes, no trimming, no clean-up. LALAL.AI’s audio is exactly as downloaded. The song itself and the NiceVois and UVR results were converted to MP3 at about the same quality as LALAL.AI’s, so the page loads quickly. The players hold each MP3 in an MP4 file, with the sound itself untouched, so they jump to the exact moment you click. If one sounds louder, that is how it came out.
The practical differences
As of 18 September 2026, from each tool’s own website and our test.
| NiceVois | LALAL.AI | UVR |
|---|
| Cost for lead and backing | One free separation, up to five minutes; unlimited with a subscription | Free to preview. Downloading needs a paid plan, from $9.99 a month | Free, open source |
|---|
| Account | Not needed | Needed | Not needed |
|---|
| Install | Nothing, runs in the browser | Nothing for the website. Desktop and phone apps too | A desktop app for Windows or macOS. Linux by hand |
|---|
| Where it runs | Our cloud servers | LALAL.AI's cloud servers | Your own computer. A graphics card is recommended; without one it is much slower |
|---|
| What you get | One lead, combined backing, two optional backing layers, instrumental, and backing + instrumental | Lead, backing, instrumental, and backing + instrumental. Optional De-echo | Lead and backing from the Vocal Splitter, plus vocals and instrumental |
|---|
| Formats | WAV, FLAC, MP3, OGG, M4A | Same as your upload. Choosing another format is for paid plans | WAV, FLAC, MP3 |
|---|
Which one to use
- LALAL.AI if you want a polished app on every device, and more than lead and backing: it also separates drums, bass, guitars and more. It is a mature product that many people rely on, and on our song it gave the cleanest backing vocals and instrumental.
- UVR if you have a good graphics card and like control. It works offline, costs nothing, and lets you choose from a large library of models and settings. Much of today's separation work, ours included, grew from the community around it.
- NiceVois if you want lead and backing split for free, in a browser, with no sign-up and no graphics card. And if you want to go on and sing the part yourself: NiceVois can train a model of your own voice and put it on the backing track.
What NiceVois runs
Our splitter uses community models: BS-RoFormer separates vocals from music, Frazer/Becruily separates lead from backing, and UNMIXX (Proposed) splits only the backing into two layers. The lead stays in one stereo file. The combined backing and its two optional layers are mono.
We did not train those models, and we thank the people who did. What we add is running them for you on our own graphics cards, for free, with nothing to install.
Common questions
Is there a free alternative to LALAL.AI for splitting lead and backing vocals?
Yes. NiceVois includes one free lead and back separation, up to five minutes, without sign-up; subscribers have unlimited splitting. UVR is also free if you install it on your own computer. Listen to the files above to compare results on the same song.
Which lead and backing vocal splitter is best?
It depends on the song, and one song is not a verdict. The examples show how each tool handles the same overlapping vocals. Every file is on this page so you can judge for yourself.
Sources
Every fact about the other tools comes from their own pages, checked on 18 September 2026. The listening results and timings are from our own test.
LALAL.AI
UVR
The models NiceVois runs
Found something out of date or unfair? Prices and features change. Email info@nicevois.com and we will check it and correct the page. NiceVois is not affiliated with LALAL.AI or with the UVR project, and their names belong to their owners.