172b7f64e0
The deepest audio lever: a score carries no recording, only note events. A deterministic trig-free reference synth (phase-accumulator oscillator + linear ADSR, all in the Fx floor) reconstructs a canonical i16 PCM mixdown; conformance is mixdown-equivalence, the music counterpart of spatial audio. A soundfont/neural instrument is the sink's presentation. - wai-rs `score` feature: WSCR container + reference synth + mixdown/ score hashes; corpus (scale/chord/arp) via wai_score_vectors; registered + tiered Lossless. - wai-web ScoreSink + the /score browser sink (in-tab verify + Web Audio). - extensions/score.md, SPEC §5 row, content-taxonomy music → ✅. Green: wai-rs all features (68 lib + integration) + clippy, wai-web wasm. Co-Authored-By: Claude Opus 4.8 <[email protected]>
38 lines
1.5 KiB
Markdown
38 lines
1.5 KiB
Markdown
# Score Conformance Corpus
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Vectors for the score extension (`wai.audio.score`). The criterion is
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**mixdown-equivalence**: given the same score, a conforming sink MUST
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render the identical canonical `i16` PCM via the deterministic reference
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synth, hence the identical BLAKE3 — on every machine, no tolerance
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parameter. The music counterpart of spatial audio's
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mixdown-equivalence, with the recorded sound objects replaced by note
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events.
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The reference synth is trig-free: a phase accumulator drives a
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piecewise-linear oscillator (saw / square / triangle / pulse) shaped by
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a linear ADSR envelope, all in the `wai.det.fixed64` floor. Pitch is
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carried as a per-sample phase increment authored off-line, so the floor
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never evaluates an exponential. A sink with a soundfont or neural
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instrument renders the same score richly — that is presentation, not
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conformance.
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## Layout
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- `vectors/<name>.wscr` — the `WSCR` container (contract + note events).
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- `expected_hashes.json` — per score: `notes`, `duration`, `score_hash`
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(identity), and `mixdown_hash` (the conformance quantity).
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Vectors:
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- `scale` — a C-major scale ascending (saw).
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- `chord` — a C-major triad held together (triangle, polyphony).
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- `arp` — a four-step arpeggio that changes timbre across the phrase.
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## Running
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```
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cd ../wai-rs
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cargo run --features score --bin wai_score_vectors -- verify ../score-conformance
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cargo run --features score --bin wai_score_vectors -- gen ../score-conformance # regenerate
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```
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Pass = mixdown-hash and score-hash equality.
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