docs: apply Kiko's corrections to the symphony grammar harvest
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Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
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@ -8,7 +8,7 @@ Paths below are Mimir paths. Written for Aqua (AquaSynth) before the generative
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One Mind's identity has to be a timbre plus a contour that stays recognisable after it is mixed with
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the other Minds and passed through a lossy path. The symphony adds harmony (several Minds sounding
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together as music), which Mimir never needed: Mimir emits one low-gain song at a time per speaker.
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together as music), which Mimir never needed: Mimir emits one voice at a time, a low-gain song per speaker.
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## 2. What Mimir found that transfers
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@ -19,15 +19,15 @@ C = design claim or authored opinion with no measurement behind it.
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| --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------- |
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| Tidy lab beeps are the wrong signal for a room; a birdsong-like motif replaced them. | `docs/bioacoustic-timeline-watermark.md` L3-10 (stated as a decision, no listening test). | C |
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| Identity is carried redundantly: contour survives pitch shift, rhythm survives bad frequency response, formant envelope survives a dead band, speaker variants expose room asymmetry. | same doc L82-95. Argument, not an ablation. | C |
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| A word needs no sequence grammar: one heard word identifies its event directly (128 words x 2 speaker variants, 4 syllables each). No de Bruijn grammar. | same doc L26-33; `src/Mimir.Runtime/Synchronization/MimirBioacousticTimeline.cs` (WordCount, SymbolCount = WordCount\*SpeakerCount, BuildMotifs ~L690-730). | B |
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| Word identity survives mel-cepstral warp/blur degradation; timing does not unless fitted as one global clock/delay hypothesis. | `docs/bioacoustic-training-harness.md` L58-112: identity 0.908-0.997, timing 0.357 (before) vs 0.905 (after global clock fit), compact-fast-index clean. | A (synthetic) |
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| Contestant shapes were scored against the same decoder family and damage panel; best was the six-syllable "canary-packet-trill" (two timing chips plus four payload-coloured formant notes), not the literal bird imitations. | `research/bioacoustic-contestants-2026-05-24.md` L24-38, L128-174 (honest floor 88.4 language_score, 19 bps, payload 1.000 clean), L487-489 (96 ms motif is the best tradeoff). | A |
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| Too-short or too-tight songs fail under blur: 0.100 s event spacing lost anchors to overlap; 0.105 s kept; 78 ms motif and 5-syllable finch-burst-packet collapsed (blur-light 4.358). | contestants doc L169-171, L446-455, L487-489. | A |
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| A word needs no sequence grammar: one heard word identifies its event directly (128 words x 2 speaker variants, 4 syllables each), in an event slot that repeats about every 41 s. No de Bruijn grammar. | same doc L26-33; `src/Mimir.Runtime/Synchronization/MimirBioacousticTimeline.cs` (WordCount, SymbolCount = WordCount\*SpeakerCount, BuildMotifs ~L690-730). | B |
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| Word identity survives mel-cepstral warp/blur degradation; timing does not unless fitted as one global clock/delay hypothesis. | `docs/bioacoustic-training-harness.md` L58-112: identity 0.908-0.997 on clean input only, 0.5-0.9 degraded; timing 0.19-0.73 (0.357 before vs 0.905 after global clock fit, compact-fast-index clean). | A (synthetic, clean-only range) |
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| Contestant shapes were scored against the same decoder family and damage panel; the best scorer was the six-syllable "canary-packet-trill", a hypothesis not confirmed on a physical room (two timing chips plus four payload-coloured formant notes), not the literal bird imitations. | `research/bioacoustic-contestants-2026-05-24.md` L24-38, L128-174 (honest floor 88.4 language_score, 19 bps, payload 1.000 clean), L487-489 (96 ms motif is the best tradeoff). | B |
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| Too-short or too-tight songs fail under blur: 0.100 s event spacing lost anchors to overlap; 0.105 s kept; 78 ms motif and 5-syllable finch-burst-packet collapsed (blur-light 4.358, the razor decoder; 218.368 with the sprint decoder, L453-454). | contestants doc L169-171, L446-455, L487-489. | A |
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| A 3-bit payload variant (separate band/rhythm bit) did not survive degradation (best 12.849, clean 8.084). | contestants doc L183-185. | A |
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| Real birds carry identity through redundant contour, roughness, onset statistics and cepstral envelope together; Redpoll is dense chatter with short vertical attacks, not a neat token stream; Guan is a slow broad curved phrase, good for probing the channel, poor for bitrate. The packet song was judged "still too ladder-like". | contestants doc L565-581 (two Xeno-canto mirrors via Wikimedia; Brown Thornbill file invalid, L511-513, L534-539). Flux numbers L549-562. | B (two recordings, hand reading) |
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| Positive log-mel spectral flux is a good onset/anchor surface; sustained bands recede, attacks and glides light up. | contestants doc L541-545, L577-581; but the naive flux decoder lost on speed (43.6 vs 92.5 score, L231-246). | B |
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| Positive log-mel spectral flux is a good onset/anchor surface; sustained bands recede, attacks and glides light up. | contestants doc L541-545, L577-581; but the naive flux decoder lost on speed (33.466 vs 88.129 score, clean roundtrip, L158 and L231-237). | B |
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| Once the schedule is known, the receiver only discriminates among a few local candidates; wide identity search is only for acquisition. Streaming decoder reached 1121 score at 62.6x realtime, payload 1.000 on all nine damage cases. | contestants doc L248-309. | A (synthetic damage) |
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| Polarity must be a nuisance variable; mic paths flip sign. | contestants doc L391-395. | B (physical, one capture) |
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| Polarity must be a nuisance variable; mic paths flip sign (shotgun mic 37/37). | contestants doc L391-395. | B (physical, one capture) |
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| Speaker split: left and right vocabularies differ in root (x0.94 / x1.08) and syllable weights, so each side is separable. | `MimirBioacousticTimeline.cs` BuildMotifs ~L704-725 (read as code, no experiment isolates the benefit). | C |
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Rendering recipe actually in code (`MimirBioacousticTimeline.cs` AddSyllable ~L610-640): each syllable is
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@ -35,7 +35,7 @@ a log-frequency glide (exponential sweep) with a raised-cosine envelope, summed
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1, 1.5, 2, 2.75 times the glide (weights 1, 0.42, 0.24, 0.10) plus 0.08 weight of a slow "air" term,
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20-32 ms long, four per word, gain 0.030 (canary profile 0.024 in `MimirBioacousticContestant.cs`).
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Word roots are log-spaced 2.6 to 9.6 kHz; syllable frequencies are clamped 2.3 to 14.6 kHz;
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word length 118 ms. Contours come from a small hand-written bank (about 7 contour shapes and 7 rhythm
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word length 118 ms. Contours come from a small hand-written bank (8 contour shapes and 8 rhythm
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offset sets, chosen by hash of word and speaker).
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## 3. Design constraints for Aqua's grammar
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