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Most AI stem splitters give you one combined vocal stem, not one file per singer. For genuinely separate singer tracks, start with Sencial API, whose listed features include source separation and diarization; for a phone-friendly vocal stem, use Moises, LALAL.AI, Fadr or BandLab Splitter, then split the combined vocal manually in an audio editor.
What “Multiple Singers” Means In Practice
A duet or choir can have overlapping voices, harmonies and shared reverb. The listed stem splitters document vocal-versus-instrument separation, but they do not document singer-by-singer output. Treat any result as a vocal stem unless the vendor explicitly confirms diarization or separate speakers. Keep the original recording, because artifacts are harder to repair after export.
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Choose The Right AI Route
| Tool | What Its Listing Supports | Best Fit For Multiple-Singer Work | Phone Access |
|---|---|---|---|
| Sencial API | Voice isolation, source separation and diarization through REST, WebSocket real-time processing, asynchronous jobs and webhooks | Developer workflow that needs speaker labels or isolation logic | API rather than a standalone app; check whether your Xiaomi workflow can call it |
| Moises | Up to 27 separation targets, bulk processing and MP3, WAV, FLAC, M4A and OGG exports | Creating a clean combined vocal stem before manual singer editing | Web, desktop, iOS and Android |
| LALAL.AI | Vocal and instrument separation, previews, selectable neural networks and batch processing | Comparing previews before committing to a vocal stem | Web, desktop, mobile, VST3 DAWs and API |
| Fadr | Vocal, bass, drums, melody and instrumental stems, plus MIDI, key and tempo detection | Remix preparation after extracting the shared vocal part | Check the vendor for your Xiaomi setup; the listing does not specify Android |
| BandLab Splitter | Free four-stem separation, pitch, key, tempo, volume, loop, solo and mute controls, with BandLab Studio opening | Quick phone workflow for hearing and trimming the combined vocals | Web, iOS and Android |
| VocaSplitter | Unlimited browser splits, two-, three- and five-stem modes, ZIP or individual WAV downloads | Free vocal-stem extraction when you do not need a broader workspace | Browser-only; check long-file behavior before relying on it |
| Ultimate Vocal Remover | MDX-Net and Demucs models, two-, four- and six-stem modes, batch, ensemble, pitch-shift and time-stretch | Advanced offline processing when a computer is available | Windows, macOS and Linux desktop only |
Step-By-Step Xiaomi Workflow
1. Prepare A Legal, High-Quality Source
- Use a recording you own or have permission to process. If the singers are identifiable, obtain their consent before cloning, isolating or publishing their voices.
- Keep the original file untouched and make a working copy. Note whether the singers overlap, harmonise or sing one after another; overlap is the hardest case.
2. Try Speaker-Aware Processing First
- If you build software, send the copy to Sencial API and use its documented diarization, voice-isolation and source-separation functions. Its Developer plan lists 300 minutes per month included at $49 per month; Starter lists 10 minutes of audio processing per month. Confirm current output formats and speaker-track behavior with Sencial before designing your pipeline.
- Do not use Krisp Voice Isolation for this uploaded-song workflow: its listing describes low-latency primary-speaker isolation for real-time streams and says it is designed for real-time audio, not uploaded files. Pricing is on request.
3. Extract One Combined Vocal Stem On Your Xiaomi Phone
- Open Moises, LALAL.AI, Fadr or BandLab Splitter using the platform each listing supports.
- Upload the working copy and choose the vocal or vocal-and-instrument separation option shown by that service. Preview the result before exporting; the listings do not establish that any of these services separates singer A from singer B.
- Export the cleanest vocal stem available. Moises documents MP3, WAV, FLAC, M4A and OGG exports; LALAL.AI documents previews and selectable neural networks; Fadr documents MP3 downloads on Basic and WAV downloads on Plus; BandLab documents audio or MIDI export. Check the vendor screen for the exact option on your plan.
4. Use A Free Alternative When Needed
- For a browser-only attempt, use VocaSplitter. It lists unlimited splits without an account and two-, three- and five-stem modes, with ZIP or individual WAV downloads. Its listing warns that processing can time out on files over about 15 minutes.
- For computer-based offline work, use Ultimate Vocal Remover. It lists Windows, macOS and Linux support, two-, four- and six-stem modes, batch processing and WAV, FLAC and MP3 export. It does not list Android support.
5. Separate The Singers Manually
- Load the exported vocal stem into an audio editor that can cut, mute and move regions. The tools listed here do not document a Xiaomi editor with automatic singer assignment, so choose an editor separately and verify its platform.
- Mark sections where only one singer is audible and place them on separate tracks. For overlapping lines, duplicate the vocal region, reduce the unwanted singer by volume or automation where audible, and crossfade at line changes.
- Keep harmony and chorus sections labeled as “mixed” when both voices remain. Do not call them isolated singer tracks unless the voices are actually separated.
6. Check The Result On Headphones And Phone Speakers
- Listen for syllables from the other singer, metallic warbling, missing consonants and reverb tails.
- Compare the vocal stem against the original at the same starting point so timing errors are obvious.
- Export a separate preview for each singer and keep the mixed vocal as a reference.
Plans And Limits To Watch
| Tool | Documented Free Or Entry Terms | Restriction Relevant To This Job |
|---|---|---|
| Moises | Free: up to 5 uploads per month and files up to 5 minutes | Free separation options are limited; Premium lists unlimited uploads and files up to 20 minutes |
| LALAL.AI | Starter is always free with 10 relaxed-queue minutes and 200 MB per file | Full result downloads are unavailable on Starter; batch processing is paid |
| Fadr | Basic includes basic separation, MP3 downloads, MIDI detection and Remix Maker | Plus is $10 per month and adds 18 stem types, one-hour uploads, WAV downloads, a DAW Stems Plugin and API access |
| BandLab Splitter | Free four-stem Splitter for BandLab account holders | Uploads are limited to 15 minutes; seven-stem separation requires member access |
| VocaSplitter | Free, unlimited splits, no account required | Browser-only and may time out on files over about 15 minutes |
| Ultimate Vocal Remover | Free desktop software | No hosted web, mobile or API workflow is listed |
Consent, Covers And Publishing
Get consent from each singer before processing an identifiable voice, especially if you plan to clone, remix or publish it. Check the selected service’s current terms for uploads, downloads, covers, samples and commercial use.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Best Practical Choice
For a Xiaomi phone user, begin with Moises or BandLab Splitter to obtain a combined vocal stem, then label and edit singer sections manually. Choose LALAL.AI when previewing neural-network options matters, Fadr when remix metadata and stems matter, VocaSplitter for a no-account browser attempt, and Ultimate Vocal Remover for offline desktop control. Use Sencial API only when you can build an API workflow and need its documented diarization capability; confirm that its output meets your exact singer-by-singer requirement before processing a full project.
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