Try two stems—or opt in to four.

Broad vocals and instrumental

One authorised finished mix becomes broad vocals, broad instrumental and a diagnostic reconstruction.

The instrumental is the complement of the vocal estimate. It does not claim separate drums, bass, synth or guitar.

SCNet core four

Profile scnet-large-musdb-release-v1 in scope core-four-stems-v1 estimates vocals, drums, bass and grouped other. The pinned 168,848,417-byte checkpoint, offline synthetic check, three authorised full-song canaries and repeat resource runs passed their objective gates. Complete listens reported no catastrophic defect.

This is a public opt-in preview, not recovered studio multitracks. A 36 GB M3 Max is the first verified machine class; other Apple-silicon classes remain accessible but unverified.

Six roles with synth and guitar

Private Studio experiments combine SCNet core four with Mega-53 synth and BS-RoFormer-SW guitar specialists, constrained inside grouped other. The review roles are vocals, drums, bass, synth, guitar and residual other.

These specialists are unregistered. There is no public six-role command, automatic source choice or activation. Exact reconstruction records accounting only, not separation quality.

private_review_package_recovered_model_free_resource_gate_incomplete

The original plan was consumed once. Its replacement run historically completed 3 model loads and 9 completed inference attempts, but did not persist the guitar worker receipt. A separately approved network-denied recovery then reused 21 retained private audio payloads and wrote a private review package without loading or running a separator: 0 checkpoint loads, 0 model constructions, 0 model loads, 0 inference attempts, 0 canonicalisations, 0 model-worker subprocesses and 0 network attempts. One parent sandbox re-exec provided security supervision.

All 24 new PCM24 review artifacts reconstruct within 0 LSB, but the guitar worker result receipt and guard counters were not persisted and guitar peak-memory evidence is absent. Therefore the guitar resource gate and full resource gate are incomplete, within_known_ceilings is unknown, and full objective qualification is false.

Evidence binds plan 869ac229d5c95c9c3d5eb2c9eb38da368056f6fe3c644de9830cc593313efb7d, recovery request 686a47f09b2f2e95a670e621aa75582e27bb14cebc64035f5c56af3c77f3e60c and recovery report 42500c2e9542aee5fc0e238697733923586ad1e37c54b1359a496cf832f330a0. Its bound review is complete with status human_listening_complete_no_selection, document 093347845c41bb0c456a10564701961c627fea5737486a901627b0c4f5208a86: all 3/3 songs were useful and non-catastrophic; core roles were useful in 3/3, and synth and guitar were each useful in 2/2 confirmed-present cases. No scored role reported bleed, artefacts or timing/join problems. Both specialists reported some missing content in 2/2 cases. There were no cannot-tell or not-tested ratings.

This is positive private musical evidence, not objective or resource qualification. The immutable private outcome status is private_full_song_six_role_listening_evidence_recorded_resource_gate_incomplete, document fa5d1d24627dce4cb1e27175055f1e3d5a3a70683b98e2376d92ee125bc2163c. The next technical gate is a newly bounded objective-only plan that records the repaired guitar worker receipt, guard counters and peak memory. Recovery, review and outcome recording performed no automatic retry, public activation, source selection, MIDI, hosting, redistribution, audio upload or model download.

Software checks evidence; people judge music

human listening decides usefulness and later promotion; preview admission checks licensing, privacy, integrity, timing, resources and reconstruction only.

Plan before downloading

Run scripts/setup-separation-alpha-macos.sh --plan for the default or scripts/setup-separation-core-four-scnet-macos.sh --plan for core four. Planning explains terms, size, network use and install location without changing the Mac.

Check the exact local profile

After explicit installation, run .venv/bin/sunofriend-separate doctor. Doctor hashes the pinned files without loading the model or processing audio.

Review rights, source and output first

Run .venv/bin/sunofriend-separate separate SONG --out FRESH --rights-category owned with an accurate rights category. Planning writes no song output.

Execute only after confirming authority

Add --execute --confirm-rights --open-review. Judge usefulness, bleed, missing content, texture and joins before using any stem.

state one narrow musical or engineering question

seal authorised inputs and run one bounded local experiment

check machine evidence without treating a score as musical taste

bind an explicit human listening review to the exact result

publish after objective gates while preserving useful, poor and inconclusive musical evidence

public two-stem alpha with an explicit SCNet core-four public opt-in preview

Both routes remain separate local commands rather than a Simple/TUI default. The website receives no audio.

Synth and guitar remain private research

The recovered six-role review does not register profiles, authorize public activation or establish full objective or resource qualification.

Reconstruction is necessary, not sufficient

Exact additive accounting cannot prove clean isolation, musical usefulness or similarity to lost studio tracks.

Tell us whether the stems helped

Report overall and per-role usefulness, bleed, missing content, artefacts, timing and joins. “Cannot tell” and “Not tested” are valid.

Report the first confusing or failing step

Include Mac model, macOS, source format, approximate duration, coding agent and exact command. Do not attach private audio, stems, review JSON, filenames or metadata.