human-experience-filter-art/sessions/0022/SESSION-0022.0-TRANSCRIPT-2026-06-26T08-40--2026-06-26T08-50.md

Session 0022.0 — Transcript

App: human-experience-filter-art Start: 2026-06-26T08-40 (PST) End: 2026-06-26T08-50 (PST) Type: executing-plans (operator-driven follow-up to the audio feature) Posture: yolo Claude-Session: e0cc053a-41fa-416d-a4f5-493f14984e75 Status: FINALIZED

Launch prompt

(1) "It shouldn't say 'Tap to Start Sound'… it can start with both sound and video off but immediately go to the app. We should have a 'Loading Universe…' loading screen until all media has been downloaded and the experience is ready to run." (2) "I still can't hear the sound, even in private mode." (3) "The first time video is turned on, also turn on audio. If audio is turned on before video after the app loads, just audio should turn on."

Pre-state

• Sessions 0020/0021 had shipped the audio feature + a 0021 "Safari fix" (tap-to-start overlay that primed A/B <audio> elements). The operator reported audio STILL silent on their real browser (even in private mode), plus the UX requests above.

Session arc

1. Why the 0021 fix failed. It primed srcless A/B elements in the tap gesture and played the real audio in an async continuation (after await fetch). Safari unlocks an element only when play() runs synchronously inside the gesture and on an element with a src — so neither condition was met. Headless WebKit relaxes autoplay, which is why automated tests never caught it.
2. Redesign (client-only, branch session-0022):
   • Single <audio id="aud"> element (dropped A/B). It's played synchronously inside the toggle's own change handler — the canonical Safari unlock. Altitude changes reuse the now-unlocked element with a brief fade-swap.
   • "Loading Universe…" splash (#loading, in the HTML so it shows pre-JS): main() now awaits preloadAllMedia() (driving a progress bar), then hideLoading(). Replaces the tap-to-start wall.
   • Both toggles default OFF (black + silent at start) — no autoplay needed until a toggle is flipped.
   • First Video-on couples Audio: the Video change handler, on the first on, sets #audio checked and plays — in the same gesture (so it unlocks on Safari). Audio toggled on first stays audio-only.
   • Server contract unchanged ({off,soundtrack}); the client now drives playback directly from the ring's scale.audio, ignoring render.audio.
3. Verify + ship. Rewrote the 5 E2E for the new flow (single #aud, no gesture, loading wait, the coupling, video-off blanking). Caught a test bug — #black.hidden is display:none, so wait_for_selector default (visible) timed out; switched to state="attached". 290 passed, 2 skipped; 5 E2E pass. Verified in headless Chromium AND WebKit: first-Video-on couples audio, soundtrack plays, video shows, zero JS errors; screenshotted the splash + running app. Merged to main.

Deferred decisions

No low-confidence calls — all three were explicit operator requests. The single-element synchronous-in-gesture play is the standard Safari remedy.

Cut state

• main @ 4ac39c9, clean, pushed. 290 tests + 5 Playwright E2E pass.
• Honest caveat — still unverifiable headlessly: every engine Playwright ships (Chromium, WebKit) relaxes autoplay, so I cannot prove real-Safari/iOS now plays. The fix is the canonical pattern (sync play() in the gesture, real src) and is a genuine change from 0021's broken approach — but it needs the operator's real-device ear.

Operator plate

• No tap wall: "Loading Universe…" → app with both toggles off (black/silent). Flip Video → video + audio together; flip Audio alone → audio only.
• If sound is STILL silent on the real device, that points to something beyond autoplay (codec/MIME, file, or element error) — next session should capture aud.error and the exact browser.

Next /goal

/goal confirm on a REAL device (esp. iPad/Safari) that audio is now audible when Video/Audio is toggled on and the "Loading Universe…" → app flow feels right; if still silent, capture aud.error + the exact browser. Then the deferred per-altitude music layer per docs/audio-candidate-pool.md