music/records/benchmark/PROBE_DEMUCS_BASS.generation.json
{
"artifact_id": "PROBE_DEMUCS_BASS",
"theme_id": "",
"role": "derived_stem",
"chapter_id": "",
"artifact_class": "DERIVED-ANALYSIS",
"derivation": {
"operation": "source-separation",
"model": "demucs-htdemucs",
"model_revision": "htdemucs",
"stem_class": "bass",
"source_out_path": "build/audio/benchmark/stems/PROBE_MIX.wav",
"source_sha256": "9dd5d9fdc6b06d63a8acccac4647a28daedb8039e0644e756a0906b0f3601bac"
},
"caption": "",
"task_type": "source-separation",
"model_id": "demucs-htdemucs",
"model_revision": "htdemucs",
"prompt_hash": "7a797998421863312254c54c3cb68cac4dabd9645177d3159760eacc752e3fab",
"out_path": "build/audio/benchmark/stems/demucs/htdemucs/PROBE_MIX/bass.wav",
"sha256": "e05fef88c1d5a8fff542f49e0237dc584551948111355db2cd825901dc631b0d",
"bytes": 4233644,
"honest_tier": "DERIVED ANALYSIS - NEVER SHIPPED",
"generated_at": "2026-08-05T02:03:34.366146+00:00",
"reveal_gate": "",
"reveal_firewall": "N/A - no caption, no id token, no player surface",
"sonniss_conditioning": "NONE - the only input is our own generated probe mixdown",
"notes": "DERIVED ANALYSIS ARTIFACT: the 'bass' stem Demucs htdemucs separated out of PROBE_MIX.wav (sha256 9dd5d9fdc6b06d63...). Model licence MIT, re-read from https://github.com/adefossez/demucs/blob/main/LICENSE. It exists to cross-check ACE-Step's `extract` against a real separator (benchmark M3) and never ships, which is what licence_class=previz_only records. prompt_hash here is a DERIVATION hash over the derivation block, NOT a generation_prompt_hash -- a separator has no prompt, and the two must never be compared. No Sonniss byte is an input to this artifact: the source is our own generated probe mixdown."
}