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docs: add a "too many sections per day" tuning note to the README

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Consolidates the existing per-knob hints (margin, grace period, min
duration, highlights-only review) into one ordered list of what to
adjust when the detector flags too much, and why ranking by score is
preferable to thinning the list.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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jonathan
2026-06-11 14:43:30 +02:00
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README.md
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@@ -168,6 +168,17 @@ Shows recordings grouped by day with collapsible sections. Features:
- **Fast loading** — analysis results are cached server-side on disk and client-side per session; cached waveforms load only for expanded day groups, and collapsed days fetch nothing until opened.
- **WCAG-compliant** — skip link, `aria-expanded`/`aria-controls` on the player toggle, `aria-live` status, focus management, `role=img` on SVG waveforms.
### Too many sections per day?
The detector is purely energy-based: anything that rises *margin* dB above the rolling background floor for at least *min duration* seconds is flagged. In a quiet environment the floor sits very low, so even modest sounds — a gust, a distant car, rustling — clear the margin, and an outdoor day can easily produce over a thousand sections. What to adjust, in rough order of preference:
1. **Review by rank instead of thinning the list** — tick **Highlights only** (or use **U**/**I**) to step through just the top-scored sections. Nothing is discarded, so quieter events are still there if the top of the list comes up empty.
2. **Raise the grace period** (2 → 15–30 s) — merges clusters of related noise (a rain burst, one long conversation) into a single section. Cuts the count heavily without dropping any audio from review.
3. **Raise the margin** (12 → 15–18 dB) — demands more prominence above the background. The quietest events disappear first, so move in small steps.
4. **Raise min duration** (0.5 → 1–2 s) — drops short rustles and pops, but beware: single bangs or knocks are themselves short.
Changing any of these re-runs the analysis (results are cached per parameter combination), so experimenting on one day before re-analysing everything is cheapest.
### HTTP API
Everything the UI does goes through these endpoints, so they can also be scripted: