Iterative Audio Separation with Mixture Consistency via MIMO Model Extension
arXiv - 2026
Pinned Sony README: MUSDB18-HQ, museval median-of-medians. Compare only within this protocol, separately from MVSEP and other paper scores.
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Separate lead vocals, harmonies and accompaniment, or extract dry vocals for covers, karaoke and vocal editing.
Input
Supports inputs in formats such as mp3 / wav / flac / ogg / m4a / aac / aif / aiff / mp4 / mov / mkv
Supported formats
Output
2 × WAV
Use case
Sony MIMO BS-RoFormer separates vocals and accompaniment in three iterations, with Large and Small checkpoints. Complex mixes may still bleed; there is no matched comparison with this site's Leap models.
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Sony MIMO BS-RoFormer separates vocals and accompaniment, with Large and Small versions. Complex mixes may still contain bleed.
Runtime wrapper for UVR/MVSep-style separator checkpoints. It provides the model loading, WAV stem export, and FFmpeg-backed audio format handling used by this tool.
MVSep 9205 supplies the lead/accompaniment-with-harmony leg, BS-RoFormer Leap XE 90 bands supplies vocals with harmony, and BS-RoFormer Leap Instrumental supplies the accompaniment reference.
Leap XE 90 bands supplies the lead vocal, BS-RoFormer Leap Instrumental supplies the accompaniment reference, MVSep 9205 BS-Kar AVG removes backing harmonies, and the anvuew BS-RoFormer dereverb checkpoint strips reverb.
MelBand Aspiration separates breath and aspiration from other sounds, with standard and less aggressive checkpoints. Similar sounds such as fricatives may also be extracted; use isolated vocals and check articulation.
MelBand Aspiration separates breath and aspiration from other sounds, with standard and less aggressive checkpoints. Similar sounds such as fricatives may also be extracted; use isolated vocals and check articulation.
arXiv - 2026
Pinned Sony README: MUSDB18-HQ, museval median-of-medians. Compare only within this protocol, separately from MVSEP and other paper scores.
SDX23 music separation track - 2023
BS-RoFormer uses band-split spectrogram features plus RoPE Transformers; the SDX23 system ranked first in the music source separation track and a smaller version reported 9.80 dB average SDR on MUSDB18HQ.
TISMIR - 2024
The SDX23 music demixing paper documents robust MSS benchmarks, listening tests, and that the best system improved over the prior challenge by more than 1.6 dB SDR on MDXDB21.
arXiv / ISMIR late-breaking demo - 2023
Mel-RoFormer replaces heuristic non-overlapping bands with overlapping mel-band subbands and reports better separation than BS-RoFormer for vocals, drums, and other stems on MUSDB18HQ.
2 output categories
Only records with verified public inference implementations and matching weights are shown; algorithms requiring no weights are also eligible. Closed services, unreleased weights and unmatched experiment versions are excluded. This is not an all-model leaderboard.
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Markers identify models or components used here. Scores and settings come from the cited tests, not a new evaluation of the complete site pipeline.
Choose a dataset to view all metrics for each model. Rows follow the official rank or selected metric. Bold marks each column’s best comparable value, including ties. Different evaluation protocols are ranked separately; missing scores are shown as -.
Deployable entries 4 / source rows 4
Pinned Sony README: MUSDB18-HQ, museval median-of-medians. Compare only within this protocol, separately from MVSEP and other paper scores.
| Metric rank | Model | Test setting | Params | Input length | Batch Size | Training Steps | museval SDR · (Vocals / Accomp) | Download |
|---|---|---|---|---|---|---|---|---|
| - | Sony BS-RoFormer Small baselinePublic weights · Inference code | Small | 12.1 M | 4 sec | 96 | 1,000,000 | 9.64 / 16.80 | Download |
| - | Sony MIMO BS-RoFormer SmallPublic weights · Inference code | Small | 16.3 M | 4 sec | 96 | 1,000,000 | 10.17 / 17.64 | Download |
| - | Sony BS-RoFormer Large baselinePublic weights · Inference code | Large | 72.2 M | 8 sec | 96 | 1,000,000 | 11.40 / 18.48 | Download |
| - | Sony MIMO BS-RoFormer LargeUsed on this sitePublic weights · Inference code | Large | 71.4 M | 8 sec | 96 | 1,000,000 | 11.62 / 19.04 | Download |
Markers identify models or components used here. Scores and settings come from the cited tests, not a new evaluation of the complete site pipeline.
Datasets, versions and conditions remain separate, including sources with no eligible ranking rows.
Deployable entries 4 / source rows 4
Scores apply to the listed dataset, metric and model version; results from different tests are not directly comparable.
The table includes only models with public weights or configurations that can run locally.
Choose a dataset to view all metrics for each model. Rows follow the official rank or selected metric. Bold marks each column’s best comparable value, including ties. Different evaluation protocols are ranked separately; missing scores are shown as -.
Deployable entries 4 / source rows 4
Pinned Sony README: MUSDB18-HQ, museval median-of-medians. Compare only within this protocol, separately from MVSEP and other paper scores.
| Metric rank | Model | Test setting | Params | Input length | Batch Size | Training Steps | museval SDR · (Vocals / Accomp) | Download |
|---|---|---|---|---|---|---|---|---|
| - | Sony BS-RoFormer Small baselinePublic weights · Inference code | Small | 12.1 M | 4 sec | 96 | 1,000,000 | 9.64 / 16.80 | Download |
| - | Sony MIMO BS-RoFormer SmallPublic weights · Inference code | Small | 16.3 M | 4 sec | 96 | 1,000,000 | 10.17 / 17.64 | Download |
| - | Sony BS-RoFormer Large baselinePublic weights · Inference code | Large | 72.2 M | 8 sec | 96 | 1,000,000 | 11.40 / 18.48 | Download |
| - | Sony MIMO BS-RoFormer LargePublic weights · Inference code | Large | 71.4 M | 8 sec | 96 | 1,000,000 | 11.62 / 19.04 | Download |