{
  "schema": "s2s-bench-v1",
  "kind": "clip-manifest",
  "exhibit": "half-an-hour-with-dead-composers",
  "what_this_is": "The eleven audio files the page plays, and the map from each player to the file behind it. The page prints the first sixteen characters of each sha256 beside its player; the full digests are here. These are the EXACT rendered bytes — no transcode, no normalisation, no re-cut — which is why a fingerprint printed on the page is checkable against the file the page serves.",
  "how_they_differ": "FIVE request bodies, eleven renders. Each clip names the request file in this kit it was rendered from, the seed that request pinned, and which adapter was attached at what strength. Within a group the request and the seed are held fixed and ONLY the adapter moves — which is what makes Listen 2 vs 3, Listen 5 vs 6, Listen 7/8/9 and Listen 10 vs 11 readable comparisons. `adapter_strength` is not a field of the request: the render helper sets the adapter's scale through the service's own scale endpoint and submits the unchanged payload.",
  "one_probe_that_is_not_a_control": "sousa-probe-base (Listen 1) carries its OWN request — no trigger tag, no adapter, plain words. It is a probe of what the stock model already knows, not a baseline for anything. The switched-off renders (Listen 2, 6 and 11) are this page's baselines.",
  "adapter_names": "Each adapter answers to a made-up trigger tag written into the prompt: `pd-shakedown` (Chopin, part one), `sousa-shakedown`, `bach-shakedown`. The merged adapters carry their parents' tags.",
  "verify": "sha256sum -c MANIFEST.sha256   (run from the page's audio/ directory)",
  "clip_count": 11,
  "clips": [
    {
      "clip_id": "sousa-probe-base",
      "served_at": "audio/sousa-probe-base.wav",
      "bytes": 11520044,
      "sha256": "1bcc23ac3fa0b85e7103a689b5a71e8953a99ffea7ebff3ad037412391e1084b",
      "media_type": "audio/wav",
      "audio": {
        "format": "WAV PCM",
        "sample_rate_hz": 48000,
        "channels": 2,
        "bit_depth": 16,
        "duration_s": 60
      },
      "render_request": "render-request-sousa-probe.json",
      "seed": 20260830,
      "adapter": "none — no adapter was loaded for this render",
      "adapter_strength": null,
      "render_file": "listen-20260829/16-base-knows-sousa.wav",
      "page_caption": "🔊 Listen 1 — a probe, the stock model with no adapter attached · sha256 (first 16) 1bcc23ac3fa0b85e",
      "note": "A probe with its own request, not a control: the stock model asked in plain words for a Sousa-style march, with no trigger tag and no adapter loaded."
    },
    {
      "clip_id": "sousa-scale-000",
      "served_at": "audio/sousa-scale-000.wav",
      "bytes": 11520044,
      "sha256": "f8490e7086b88ac55014eabc5e2b217b8b4ea05fdb8bb63adf3410aa066d99bd",
      "media_type": "audio/wav",
      "audio": {
        "format": "WAV PCM",
        "sample_rate_hz": 48000,
        "channels": 2,
        "bit_depth": 16,
        "duration_s": 60
      },
      "render_request": "render-request-sousa-march.json",
      "seed": 20260830,
      "adapter": "sousa-shakedown r64, pass 10 (the shipped adapter)",
      "adapter_strength": 0.0,
      "render_file": "listen-20260829/05-sousa-baseline-scale0.0.wav",
      "page_caption": "🔊 Listen 2 — the march request, adapter attached but turned to zero · f8490e7086b88ac5",
      "note": "The baseline Listen 3 is measured against: everything held fixed, the adapter contributing nothing."
    },
    {
      "clip_id": "sousa-scale-100",
      "served_at": "audio/sousa-scale-100.wav",
      "bytes": 11520044,
      "sha256": "c617868d661a41126a30e99c96ddf6082d43f3b3822752957496482138cd0d27",
      "media_type": "audio/wav",
      "audio": {
        "format": "WAV PCM",
        "sample_rate_hz": 48000,
        "channels": 2,
        "bit_depth": 16,
        "duration_s": 60
      },
      "render_request": "render-request-sousa-march.json",
      "seed": 20260830,
      "adapter": "sousa-shakedown r64, pass 10 (the shipped adapter)",
      "adapter_strength": 1.0,
      "render_file": "listen-20260829/06-sousa-adapter-scale1.0.wav",
      "page_caption": "🔊 Listen 3 — the same request, the Sousa adapter at full strength · c617868d661a4112",
      "note": "The pass-ten checkpoint — the one that shipped, and the one every downstream artefact used, despite pass five carrying the better training loss."
    },
    {
      "clip_id": "sousa-epoch5",
      "served_at": "audio/sousa-epoch5.wav",
      "bytes": 11520044,
      "sha256": "817694f173534e8597c92aa7b5c767f92b4adcd9c8490e82f342eca82850dab9",
      "media_type": "audio/wav",
      "audio": {
        "format": "WAV PCM",
        "sample_rate_hz": 48000,
        "channels": 2,
        "bit_depth": 16,
        "duration_s": 60
      },
      "render_request": "render-request-sousa-march.json",
      "seed": 20260830,
      "adapter": "sousa-shakedown r64, pass 5 (the better-loss checkpoint, not shipped)",
      "adapter_strength": 1.0,
      "render_file": "listen-20260829/19-sousa-epoch5.wav",
      "page_caption": "🔊 Listen 4 — the halfway checkpoint, same request · 817694f173534e85",
      "note": "The road not taken: pass five's checkpoint (loss 0.8768) against pass ten's (0.8839). Its render sits 0.10629 from Listen 3. No ear has ruled between them and nothing downstream was rebuilt on it."
    },
    {
      "clip_id": "bach-solo",
      "served_at": "audio/bach-solo.wav",
      "bytes": 11520044,
      "sha256": "0356a72033c3d301e8992e77bab2f54c64cf6206b72a3ce2e6725f82ce7042e6",
      "media_type": "audio/wav",
      "audio": {
        "format": "WAV PCM",
        "sample_rate_hz": 48000,
        "channels": 2,
        "bit_depth": 16,
        "duration_s": 60
      },
      "render_request": "render-request-bach.json",
      "seed": 20260901,
      "adapter": "bach-shakedown r64, pass 10",
      "adapter_strength": 1.0,
      "render_file": "listen-20260829/24-bach-solo.wav",
      "page_caption": "🔊 Listen 5 — the Bach adapter, solo · 0356a72033c3d301",
      "note": "This pair runs adapter-first; its switched-off baseline is Listen 6."
    },
    {
      "clip_id": "bach-scale-000",
      "served_at": "audio/bach-scale-000.wav",
      "bytes": 11520044,
      "sha256": "85e1dcd0ad099540d2bb338fe681c88eac1dc6892c25381b38ec6800f8341e2b",
      "media_type": "audio/wav",
      "audio": {
        "format": "WAV PCM",
        "sample_rate_hz": 48000,
        "channels": 2,
        "bit_depth": 16,
        "duration_s": 60
      },
      "render_request": "render-request-bach.json",
      "seed": 20260901,
      "adapter": "bach-shakedown r64, pass 10",
      "adapter_strength": 0.0,
      "render_file": "listen-20260829/25-bach-baseline.wav",
      "page_caption": "🔊 Listen 6 — the same request, the adapter attached but turned to zero · 85e1dcd0ad099540",
      "note": "The Bach adapter's own switched-off baseline. The adapter DARKENS this prompt: the baseline's spectral centroid is higher (10591 Hz) than the adapter render's (8130 Hz)."
    },
    {
      "clip_id": "duet-merged",
      "served_at": "audio/duet-merged.wav",
      "bytes": 11520044,
      "sha256": "82b09312c136551394e5038ccae006c2934f648e7f21d278136d20ec4d815820",
      "media_type": "audio/wav",
      "audio": {
        "format": "WAV PCM",
        "sample_rate_hz": 48000,
        "channels": 2,
        "bit_depth": 16,
        "duration_s": 60
      },
      "render_request": "render-request-duet.json",
      "seed": 20260831,
      "adapter": "duet-chopin-sousa-r64 (the 50/50 SVD merge)",
      "adapter_strength": 1.0,
      "render_file": "listen-20260829/14-duet-merged.wav",
      "page_caption": "🔊 Listen 7 — the 50/50 Chopin + Sousa duet · 82b09312c1365513",
      "note": "A separate set of merged weights, not a serving setting. That merge has no surviving build log; its error row comes from the merged adapter's own record, merge-record-duet-chopin-sousa.md in this kit."
    },
    {
      "clip_id": "duet-sousa-only",
      "served_at": "audio/duet-sousa-only.wav",
      "bytes": 11520044,
      "sha256": "300deb847f8597e21a2af29a98ef375a1626d4f0dc67dd3275faa9ac95853d37",
      "media_type": "audio/wav",
      "audio": {
        "format": "WAV PCM",
        "sample_rate_hz": 48000,
        "channels": 2,
        "bit_depth": 16,
        "duration_s": 60
      },
      "render_request": "render-request-duet.json",
      "seed": 20260831,
      "adapter": "sousa-shakedown r64, pass 10",
      "adapter_strength": 1.0,
      "render_file": "listen-20260829/13-duet-sousa-only.wav",
      "page_caption": "🔊 Listen 8 — the same request, Sousa alone · 300deb847f8597e2",
      "note": "Rendered specifically as a control for Listen 7: same request, same pinned seed, only the adapter moves."
    },
    {
      "clip_id": "duet-chopin-only",
      "served_at": "audio/duet-chopin-only.wav",
      "bytes": 11520044,
      "sha256": "eec9348b428bc7dd3b56b670e5d4aca221276e6bd3167d3015d895c046764c48",
      "media_type": "audio/wav",
      "audio": {
        "format": "WAV PCM",
        "sample_rate_hz": 48000,
        "channels": 2,
        "bit_depth": 16,
        "duration_s": 60
      },
      "render_request": "render-request-duet.json",
      "seed": 20260831,
      "adapter": "pd-shakedown r64, pass 10 (part one's Chopin adapter)",
      "adapter_strength": 1.0,
      "render_file": "listen-20260829/15-duet-chopin-only.wav",
      "page_caption": "🔊 Listen 9 — the same request, Chopin alone · eec9348b428bc7dd",
      "note": "The other parent, same request and seed. Listen 7 sits 0.11245 from Listen 8 and 0.12746 from this clip, while these two parents sit 0.15214 apart."
    },
    {
      "clip_id": "trio",
      "served_at": "audio/trio.wav",
      "bytes": 11520044,
      "sha256": "f6d6d2e74801f8884731ad6698960417734e37c1a52dfe8bf658337a68617d6a",
      "media_type": "audio/wav",
      "audio": {
        "format": "WAV PCM",
        "sample_rate_hz": 48000,
        "channels": 2,
        "bit_depth": 16,
        "duration_s": 60
      },
      "render_request": "render-request-trio.json",
      "seed": 20260901,
      "adapter": "trio-r64 (bach + chopin + sousa at equal thirds)",
      "adapter_strength": 1.0,
      "render_file": "listen-20260829/27-trio.wav",
      "page_caption": "🔊 Listen 10 — the trio: three composers at equal thirds · f6d6d2e74801f888",
      "note": "Equal weights, unequal blend: it leans toward Bach by waveform closeness (38.8 % where an even split predicts 33.3 %) and toward the dark end by brightness (35.9 % where an equal blend predicts 56.3 %)."
    },
    {
      "clip_id": "trio-scale-000",
      "served_at": "audio/trio-scale-000.wav",
      "bytes": 11520044,
      "sha256": "52dded99ece5bf2530de331e635a4cd5ae059b5fc4e6b300c141dacedde22d5d",
      "media_type": "audio/wav",
      "audio": {
        "format": "WAV PCM",
        "sample_rate_hz": 48000,
        "channels": 2,
        "bit_depth": 16,
        "duration_s": 60
      },
      "render_request": "render-request-trio.json",
      "seed": 20260901,
      "adapter": "trio-r64",
      "adapter_strength": 0.0,
      "render_file": "listen-20260829/28-trio-baseline.wav",
      "page_caption": "🔊 Listen 11 — the trio's request, everything turned to zero · 52dded99ece5bf25",
      "note": "The trio payload's switched-off baseline."
    }
  ]
}