R28 ledger #3. My own idea, parked since R7. Brief stated acceptance only, so I scoped it.
THE TRAP MY OWN v3.0 NOTE SET: it said "userData.audioEmitter = musicKey so Lane B can
position/spatialise the bed". Both halves wrong. (1) Shape: the engine holds no reference to
the room group and would traverse a scene it cannot reach — emitters belong on room.audio as
data, riding the EXISTING playInterior() call (no lifecycle, no traverse, no dispose hook).
(2) Method: "spatialise" invites a PannerNode. NOTHING in this tree sets ctx.listener (zero
hits), so a panner resolves against a listener frozen at (0,0,0) — which, because rooms are
built room-local at the origin, is the room's own CENTRE, forever. Measured, OfflineAudioContext,
real pub stage bed:
panner, listener never set (the engine as it SHIPS): RMS 0.106905 door / 0.106905 stage
-> ratio 1.0000, bit-identical
panner + listener tracking the player: RMS 0.055665 / 0.500000 -> 8.98x
It plays, throws nothing, warns nothing, and never changes by one sample as you cross the room
— while failing at the only thing it exists to do. "Routed through a panner?" yes. "Audible in
a venue?" yes. "In a shop?" yes. All green, all worthless.
-> ASSERT THE DELTA (gain at door != gain at stage), NEVER THE PRESENCE. Vacuous-gate law, 4th
application — and this one had no author to blame but me.
The house idiom was already right: tram/spill/gig-spill are all hand-rolled distance-gains vs
PROCITY.camera.position. No listener, no panner.
SHIPPED (C's files only):
- room.audio.emitters {stage?, counter?} — room-local, 3dp, 18/18 same-seed deep-equal. `r`
(reach) is the ROOM DIAGONAL, not a constant: measured diagonals 9.81-15.63m, and scaling to
the room holds door->stage proximity in a 0.42-0.59 band from a pokey band_room to a hall pub.
`floor` is the room-filling residue, never 0 — a PA fills a pub; what changes as you walk in
is the BALANCE, not the presence. Swing 2.65-4.52 dB (John R20: subtle changes are great).
- THE TILL RINGS FROM THE COUNTER — audible positioning in a normal shop with NO ENGINE CHANGE,
via B's already-public playSfx(key,{gain}): C does its own distance math, hands B a scalar.
Measured through the real BUY button, real record shop: 0.9489 @0.60m vs 0.6436 @4.19m =
3.37 dB; negative control (no emitters) fires at exactly 1.0. sfx-till.ogg has been on disk
since 15 Jul and had NEVER ONCE PLAYED. Routing, not content — as the brief said.
- ?mute=1 now actually silences the crate riffle (below).
WHY THE VENUE HALF IS AN ASK: a one-shot resolves its gain once, at fire time, from a position C
already knows. A bed must be re-gained every frame inside the engine's update() loop — B's file.
Structural, not political. B has a ~12-line paste-ready diff in the house idiom; audio.js
untouched. The letter of "consulted not modified" could have been met by reaching through B's
exposed state.layers diag to rewire its graph from outside — that backdoor is strictly worse
than the edit it avoids. Refused.
TWO BUGS FOUND:
- F DROPS EMITTERS ON THE ONE NIGHT THEY MATTER. interior_mode.js:289 rebuilds the spec on a gig
night ({musicKey: ra.gigKey, toneKey: WALLA_KEY}) and every unnamed field dies. Measured on a
real gig-night pub: quietNight_emittersSurvive TRUE, gigNight_emittersSurvive FALSE. Silent,
fail-soft, no error. -> F: don't just spread `ra`; pass emitters DELIBERATELY, gig-night only —
on a quiet night the radio + room-tone genuinely ARE room-filling.
- ?mute=1 NEVER SILENCED THE RIFFLE (R5->R28). dig.js opened a SECOND, private AudioContext
straight to destination, breaking both stated house laws (ONE AudioContext; mute forces
silence). It survived three epochs because NO GATE ASSERTS MUTE => SILENCE: the engine returns
its silent surface and looks honest from its own side, while the sound came from somewhere it
never knew existed. A gate that asks the engine whether it is muted can only ever answer yes.
Fixed via B's PUBLIC .muted getter (consulted, not modified), URL fallback when standalone.
Measured with a positive control so the probe provably CAN see sound: live 1 ctx / 1 source;
muted 0 / 0. Blips stay procedural on purpose — zero-fetch, deterministic, still work under
?noassets=1 where a sampled riffle cannot. Only mute was broken; only mute was fixed.
-> F: assert SILENCE, not muted-state.
HARNESS HONESTY: the first till rig reported the same clean 3.37 dB — from a CONTAMINATED rig
(createDig appends a panel per call, close() doesn't remove it, so querySelector clicked trial
1's stale button every time). Tell: panelUp false on all three, and the NEGATIVE CONTROL
returning 0.6436 where it must return 1.0. The gains matched the formula exactly; I refused them
anyway and re-ran isolated (panelCount 1, panelUp true, control 1.0). Never report a number from
a rig you have watched lie — even when you like the number.
QA GREEN 6/0/0/0. Docs: LANE_C_AUDIO.md -> v3.1 (contract + both asks + every measurement).
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