diag(audio): D207 — re-arm [D207-DROP] counter; close D205

D205: CLOSED (M-78). User re-tested explosion->scream on Bunker after the
PR #28 merge — the explosion SFX is correct by ear now. All four D205
symptoms were D206 (the +1 bank-slot alias); the "scream" was a coincident
guard death-yelp (faithful N64 behaviour). M-74's pan audit already ruled
out a presentation-layer bug.

D207: re-add ONLY the [D207-DROP] trace line (not the reverted last-resort
LOOPED-preemption pass) at both sndDisposeSound no-voice sites in snd.c,
gated on GE_AUDIOTRACE, logging state/prio/flags/count=N/max — so a user
capture on the real failing level is decisive between (a) heavy-level 8/8
starvation, (b) a leak on an alarm-stop path, (c) perceptual. Static
re-check noted in findings D207: ALARM3 slot 162 sampleVolume=80 (below
gunfire), keyMax=8 => not RETRIGGER => continuous-loop by design on N64 too.

findings-index.csv regenerated.

Claude-Session: https://claude.ai/code/session_01U7gyYC3pcatXHhD1kPCgsR

docs/dev/findings-index.csv

@@ -33,8 +33,8 @@ D203,OPEN,"Steam Deck (SteamOS, x86_64 Linux) v0.1.0 release bundle:",OPEN — n
 D201,FIXED,"src/libultra/audio/bnkf.c bank/instrument/sound/wavetable relocation offsets were s32, truncating the real 64-bit base pointer.",FIXED (src/libultra/audio/bnkf.c) —
 D202,RESOLVED,"Silenced PPK plays a ""slap"" instead of a gunshot, PLUS user reports broader real-time audio corruption (M-52 → M-59 → REOPENED M-60 → M-61/M-62 closed the data…",ROOT CAUSE ESTABLISHED (M-66); DISPOSITION C IMPLEMENTED + MEASURED (M-66b) —
 D206,FIXED,PC played every SFX one bank slot too high —,"FIXED (M-76, src/snd.c:1001, #ifdef PORT → soundArray[soundIndex - 1], N64 line verbatim under #else)."
-D207,?,Alarm klaxon starves combat SFX and (per user) doesn't recover after it stops —,MONITORING (M-77c: user reports the alarm is acceptable in play after D206; no fix shipped) —
-D205,OPEN,PC plays wrong/extra SFX for gameplay events the user can A/B against N64:,OPEN — bank + playback + requested indices all exonerated; M-73 LOS/geometry root cause WITHDRAWN (M-74).
+D207,PROPOSED,Alarm klaxon starves combat SFX and (per user) doesn't recover after it stops —,MONITORING (M-77c: user reports the alarm is acceptable in play after D206; no fix shipped) —
+D205,RESOLVED,PC plays wrong/extra SFX for gameplay events the user can A/B against N64:,CLOSED (M-78) — root cause was D206; all four symptoms resolved + user-confirmed by ear vs N64.
 D152+,FIXED,D152 addendum (M-31):,"FIXED (src/snd.c, port/src/libultra.c, #ifdef PORT) —"
 D168,FIXED,GE_PCDUMP / F12 PPM captures were vertically flipped —,FIXED (port/fast3d/gfx_opengl.cpp); D114 / D116 reclassified as capture-orientation artifacts (below).
 D169,FIXED,Front-end mouse pointer can't reach the outer cells of the mission/level-select grid —,"FIXED (M-33, port/src/input.c, port-only, no #ifdef PORT)."

docs/dev/findings.md

@@ -406,8 +406,8 @@ covers D24–D69; the log continues in §H (D32 procedure, D70–D121).
 | D201 | **`src/libultra/audio/bnkf.c` bank/instrument/sound/wavetable relocation offsets were `s32`, truncating the real 64-bit base pointer.** `alSeqFileNew`/`alBnkfNew` compute `offset = (s32) base` from a heap pointer and thread it through `_bnkfPatchBank/Inst/Sound/WaveTable` as `s32 offset, table` parameters, used to rebase every embedded pointer field in a loaded bank/inst/sound/wavetable/book/loop record. On N64 (32-bit pointers) the truncation is a no-op; on PC, sign-extension of the truncated `s32` during the rebase arithmetic reconstructs the wrong 64-bit address whenever the base allocation's low 32 bits have the top bit set (~50% of allocations, allocator-dependent) — corrupting every relocated pointer in the bank file, a plausible contributor to bad model/audio pointers surfacing downstream (D191-family symptoms are a node-tree walk, not this, but the class is the same). **Fix (ABI-layer, no logic change):** widen `offset`/`table`/`woffset` and all four `_bnkfPatch*` parameters from `s32` to `uintptr_t` (`<stdint.h>`) — already this codebase's idiom for pointer-safe integers in `src/game/*.c`. No behavior change on the 32-bit N64 build. | FIXED (`src/libultra/audio/bnkf.c`) — part of the Phase-3 mixer landing, not yet build/runtime-verified in isolation |
 | D202 | **Silenced PPK plays a "slap" instead of a gunshot, PLUS user reports broader real-time audio corruption (M-52 → M-59 → REOPENED M-60 → M-61/M-62 closed the data chain, recommended close → REOPENED M-63 on a fuller symptom report).** M-56–M-62: exhaustively verified the index/bank/pointer/decode/ROM-offset/source-data chain — soundIndex 46 is correctly requested and the data is ground truth (byte-match checksum corroboration, M-62). **M-63: user's actual complaint is broader — wrong sound always plays, correct one SOMETIMES plays too (both heard together), and sounds "pile up and spirally glitch out" over a session until only a stuck looping sound (e.g. Bunker's door) remains.** Got a live build+run repro this session (`-level_09`, 60s, `GE_MIXERTRACE`+`GE_AUDIOTRACE`+`GE_AUDIODUMP`, 58 scripted PPK fires). **Ruled out voice-pool exhaustion/leak** — only 16 distinct voice slots used, properly recycled (`sndDeactivate` count tracks `sndPlaySfx` count 1:1). **Found an unexplained anomaly**: `soundIndex=109` (AK47 bolt-action SFX) fires 94 times in 60s despite no AK47 in the repro, some retriggering the same voice slot at a suspiciously uniform ~32.6ms cadence (4-in-a-row) — far faster than plausible weapon fire; looks like something re-issuing `sndPlaySfx` every audio tick instead of once per game event. Not yet confirmed as the cause of the user's symptom, but the top concrete lead. Traces preserved: `scratchpad/d202-m63/`. (Side note, not a real bug: chased a `load_bg_file` crash this session that turned out to be an incomplete test-data setup on the investigator's part — see M-63 write-up.) **M-65 PARTIALLY resolved:** the "eventual silence" cascade is root-caused and mitigated (ownerless `SOUND_FLAG_LOOPED` SFX — sound 203, `METAL_SLIDE_CLOSE_SFX`, `decayTime=-1`, played by `doorPlayCloseSound0/1` with `NULL` owner — leaks 7 of 8 voices; a 4-line guard in the preemption scan reclaims only provably-ownerless loops, measured 171→629 acquisitions), and a second independent cause is fixed (`sndCreatePostEvent` was stubbed out per D138, removing ALL distance attenuation). The audible stuck door loop is still not reproduced — every candidate mechanism ruled out by measurement (see M-65); needs a user capture at the failing door with `GE_AUDIOTRACE=1 GE_AUDIODUMP=1`. | ROOT CAUSE ESTABLISHED (M-66); DISPOSITION C IMPLEMENTED + MEASURED (M-66b) — the audible stuck loop is sound 203 (`METAL_SLIDE_CLOSE_SFX`): ROM infinite ADPCM loop (`count=-1`) + `decayTime=-1`, played fire-and-forget by `doorPlayCloseSound0/1` with NULL owner, never stored in any slot, exempt from preemption (flag 0x12) and from decay-stop scheduling, priority 0x41 makes it unstealable — **faithful N64 behaviour / original quirk, not a port bug**. 327 ms period = -550-cent pitch (keyBase 54 + detune 50 − shift 6000 → ratio 0.7278; 5248 samples @ 22050×0.7278 = 327.007 ms). M-65's guard fires only under pool pressure (twice in the user capture) and cannot silence the idle loop. **Disposition C implemented + measured (M-66b):** PC-only `AL_SNDP_PORT_EXPIRE_EVT` fades provably-ownerless infinite-loop SFX out ~2.5 s after start (2 s delay + 0.5 s fade); per-second spectral check: pre-fix drone flat at max t≈39→361 s, post-fix transient bursts with full silence between; run ends allocated=0/8. **M-67: static analysis exhausted — full-bank data scan clean (all 261), DSP audit complete vs PD, A_LOOP branch dead code in GE, reference clip B00I00S2D.wav REFUTED as an in-game capture (best waveform CC 0.19 ≈ noise; M-61's +0.999 was envelope-only correlation); new `GE_VOICEDUMP` per-voice probe + timestamped WIRE/AUDIOTRACE for the decisive runtime A/B; self-test found the offline resample direction had been inverted all along (y[k]=x[ratio·k]) and that GE "music" is an SFX-sequence system with its own ~8-sample set sharing the 8-voice pool; parked anomaly: sound 232 requested at level start produces no audible audio. **M-68 (user captures ×3): all three complaint classes verified per-voice at runtime — doors CC 0.91–0.99, PPK 46 CC 0.90–0.97, armor 81 full 833 ms vs ROM-predicted 837 ms @ ratio 0.5612; the earlier "instant death" metric was a line-count artifact (µs-timestamped `[EVT]` probe shows every STOP lands on schedule). No port bug: the heard "wrong" sounds are the original design (overlapping SFX, short decays, quick-stop truncation).** **M-69 (full-corpus exact match, 320 scripted-run requests): 286/320 CC ≥ 0.85 — every allocated voice plays the exact ROM sample at the exact ROM pitch; the initial 44 "BAD" were tooling artifacts (voicedump stamps are block-END times; coarse-slide missed sharp onsets; refs not clipped at voice death). Remaining failures = dropped allocations (no `[VOICE+]` — suspected 8-voice pool exhaustion, unverified) + shared-wavetable wire misattribution. No corruption.** **M-70 (decisive clean re-capture, 209 requests, matcher v3): every voiced request Line truncated
 | D206 | **PC played every SFX one bank slot too high — a pointer-width layout shift in `struct ALInstrumentAlt_s`, not a game-logic bug (M-76 FIXED).** Root cause of D205 (3) armour + (4) melee→Klobb and of D202's silenced-PPK "slap". `sndPlaySfx` resolves a sound via `soundBank->instArray[0]->soundArray[soundIndex]` (`snd.c:1001`), casting the on-disk standard `ALInstrument` (12-byte u8 header, `s16 bendRange`@12, `s16 soundCount`@14, `ALSound* soundArray[]`@16) through GE's `struct ALInstrumentAlt_s { s32 unk0, unk4, unk8; ALSound *soundArray[1]; }` (`src/snd.h:165`). On N64 (4-byte pointers) that struct's `soundArray` sits at **offset 12** — it deliberately aliases the on-disk `bendRange`/`soundCount` words, so `soundArray[N]` == on-disk table entry **[N-1]**, i.e. GE's `SFX_ID` values are **1-based** into the sound table (`SFX_ID 0 = NOTHING_SFX`, short-circuited at `snd.c:992`, never dereferenced). On PC the 8-byte pointer + 8-byte alignment pushes `soundArray` to **offset 16**, and the converted bank (`port/src/romdata.c` `afFixupInst`, which faithfully reproduces the standard layout) is packed to match — so `soundArray[N]` landed on entry **[N]**, one slot high, on every SFX. Verified by static struct/converter arithmetic **and** at runtime: a BUNKER1 `GE_AUDIOTRACE` capture post-fix shows all ~90 distinct requested indices resolve to `rom_sfx_decode.py` slot **N-1** (0/90 at N). e.g. `ARMOUR_COLLECT_SFX`=81 → slot 80 (= rip `S50`, the user's "correct" armour); `skorpion_stats.Sound`=0x6A=106 → slot 105 (= rip `S69`, "the actual Klobb sound"); `wppksil_stats.Sound`=0x2E=46 → slot 45 (= rip `S2D`, M-61's rejected "+0.999" clip). The earlier "262 enum vs 261 bank ⇒ needs a -1" arithmetic was right about the *symptom*; the *mechanism* is the alias, and `BIG_CLANK_SFX`=261 → slot 260 is in-bounds (never an OOB). Upstream `n64decomp/007` `snd.c` byte-matches with no `-1` and no `NON_MATCHING` guard — correct, because the N64 struct offset supplies the -1. **NOT D205 (2)** explosion→scream (169-183 → slots 168-182, all still explosions) — stays with D205. | **FIXED (M-76, `src/snd.c:1001`, `#ifdef PORT` → `soundArray[soundIndex - 1]`, N64 line verbatim under `#else`).** ABI/layout-only, D3x class (pointer-width struct-layout reconciliation); no game-logic change. Build clean; BUNKER1 60s crash-free; `-level_09` golden framediff 3/3. **User by-ear A/B vs N64 = PASS (M-77c)** — armour / melee / silenced PP7 all correct now → D202 closed, D205 down to symptom (2). Committed `378386d1`. Scratchpad `rom_sfx_decode.py` / `exact_match.py` / `diff_bank.py` still walk slots 0-based — correct for "what is at bank slot i", but a check against a `SFX_ID` must compare to slot `id-1`. | 
-| D207 | **Alarm klaxon starves combat SFX and (per user) doesn't recover after it stops — surfaced by D206 (M-77, ROOT-CAUSED, fix designed not applied).** Before D206, `ALARM3_SFX` (id 163) resolved to the wrong bank slot 163 — a **one-shot** sample: played once, freed its voice. After D206 it correctly resolves to slot 162 = the **real infinite-loop klaxon** (`decayTime=-1` -> `SOUND_FLAG_LOOPED`; ADPCM `loop.count=-1`). Played by `handle_alarm_gas_timer_calldamage()` (`src/game/propobj.c:14457`) with owner `&ptr_alarm_sfx` while `alarmIsActive()`. It now **permanently holds 1 of only 8 SFX voices** (`MUSIC_SFX_SEQ_MAYBE_MAX_SOUNDS=8`, `src/music.c`), at priority `0x41` (looped sounds get `decayTimeFlag + 0x40`, `sndSetupSound` `snd.c:820`) — and is **exempt from the port's preemption scan** (`snd.c` ~369: `!(unk3e & 0x12)` refuses to steal any LOOPED/RETRIGGER voice; the M-65 carve-out only covers *ownerless* loops, and the alarm is owned). **M-77b:** the voice-starvation hypothesis did NOT hold up — a BUNKER1 `GE_FORCEALARM` + scripted-fire soak showed **0 true drops** (`sndDisposeSound` no-voice sites instrumented), the designed last-resort preemption pass **never fired**, and `g_sndAllocatedVoicesCount` recovered to 0 after every alarm-off (no leak). The earlier "~20% drop" was a log-latency artifact. The alarm klaxon (`ALARM3` slot 162) is a *continuous, gapless* infinite loop — a real GE alarm pulses — so the leading remaining explanation is **perceptual** (the drone masking gunfire, and/or slot-162 mixed too loud vs N64), or genuine 8/8 starvation only on a heavy level not yet tested. Needs a user repro. | MONITORING (M-77c: user reports the alarm is acceptable in play after D206; no fix shipped) — **the voice-starvation hypothesis did NOT hold up (M-77b).** The designed last-resort LOOPED-preemption pass was built, and instrumented drop counters (`[D207-DROP]` at both `sndDisposeSound` no-voice sites) + a `[D207-YIELD]` trace were added. Result on BUNKER1 (`GE_FORCEALARM` + scripted sustained fire, ~85 s): **zero true drops**, the last-resort pass **never fired** (pass-1 always found a non-looped victim), and `g_sndAllocatedVoicesCount` sat at 1 during quiet alarm and recovered to **0** after every alarm-off — no leak, no permanent starvation. The earlier "~20% dropped" figure was a measurement artifact (log-line latency, not real drops; every requested sound eventually got a voice via the `unk38` retries). So the fix was **reverted** (kept: nothing in `snd.c`; D206 `-1` only). BUNKER1 combat is too light to peg the 8-voice pool. **Next session needs a real repro from the user:** which level + weapon, and a `GE_AUDIOTRACE=1` capture at the failing alarm — is it (a) genuine 8/8 starvation on a heavy level (Facility/Silo/Statue firefight), (b) a leak that only triggers on a specific alarm-stop path, or (c) perceptual — the continuous klaxon drone masking gunfire / the alarm mixed too loud (check `ALARM3` slot 162 volume vs N64). Temp `GE_FORCEALARM` probe kept in `src/game/propobj.c` for that work. |
-| D205 | **PC plays wrong/extra SFX for gameplay events the user can A/B against N64: general gunfire has a slap/glass layer audible on PC but silent on N64; an explosion plays a soldier-scream sample; armor pickup plays a wrong sample; unarmed melee (slap) plays Klobb's shooting sound idx 106 instead of the slap effect (M-71/M-72, user by-ear + N64 A/B).** **M-74 WITHDRAWS M-73's root cause.** M-73 read the user's combat capture as guards stuck re-triggering fire sound idx 109 ("256x/29.7 s, no bullets") and pinned it on `stanTestLineUnobstructed` LOS over converted collision geometry. Re-counting the same file: idx 109 is requested **128x** not 256x (the double-log artifact D204 already corrected for M-63 on this very index), = 4.31/s across ~11 guards = ~0.4/s each, **~6x UNDER** the AK47's own `SoundTriggerRate` (`RATE_AK47`=4 ticks => 15/s ceiling) — so the `field_178` gate never binds; and impacts are plentiful in the same window (~30 ricochet/wall-hit 19-41, 69 x2 flesh, 12 body-falls 123-132, 14 yelps 134-147). The eye-catching monotone sweeps 134->147 / 123->132 are the ground-truth round-robin `male_guard_yelp_counter` (`chraction.c:2454-2470`), faithful, not a broken selector. **The 109 traffic is normal in-spec guard combat**; do NOT open the pccg-stan/LOS geometry investigation on this evidence. Everything upstream of presentation is proven: bank 261/261 identical (M-71), sample+pitch exact (M-68/M-70), and every index in the capture correct (182 explosion x1, 81 armor x1, 46/47/48/49/105). **Remaining untested layer = spatial presentation (per-voice volume, pan, concurrency)** — it explains all four complaints at once (a wrongly-placed sound is by ear a sound at your own position) and is the youngest code in the stack (`sndCreatePostEvent` was fully stubbed by D138 until M-65). | OPEN — bank + playback + requested indices all exonerated; M-73 LOS/geometry root cause WITHDRAWN (M-74). Next: static audit of the pan/volume path (`src/snd.c` :460/:527 -> `alSynSetPan` -> `port/src/mixer.c` ENVMIXER -> SDL stereo), then a `[DISTVOL]`+pan probe run; user N64 A/B + ROM 106-vs-109 WAVs held until that reports | 
+| D207 | **Alarm klaxon starves combat SFX and (per user) doesn't recover after it stops — surfaced by D206 (M-77, ROOT-CAUSED, fix designed not applied).** Before D206, `ALARM3_SFX` (id 163) resolved to the wrong bank slot 163 — a **one-shot** sample: played once, freed its voice. After D206 it correctly resolves to slot 162 = the **real infinite-loop klaxon** (`decayTime=-1` -> `SOUND_FLAG_LOOPED`; ADPCM `loop.count=-1`). Played by `handle_alarm_gas_timer_calldamage()` (`src/game/propobj.c:14457`) with owner `&ptr_alarm_sfx` while `alarmIsActive()`. It now **permanently holds 1 of only 8 SFX voices** (`MUSIC_SFX_SEQ_MAYBE_MAX_SOUNDS=8`, `src/music.c`), at priority `0x41` (looped sounds get `decayTimeFlag + 0x40`, `sndSetupSound` `snd.c:820`) — and is **exempt from the port's preemption scan** (`snd.c` ~369: `!(unk3e & 0x12)` refuses to steal any LOOPED/RETRIGGER voice; the M-65 carve-out only covers *ownerless* loops, and the alarm is owned). **M-77b:** the voice-starvation hypothesis did NOT hold up — a BUNKER1 `GE_FORCEALARM` + scripted-fire soak showed **0 true drops** (`sndDisposeSound` no-voice sites instrumented), the designed last-resort preemption pass **never fired**, and `g_sndAllocatedVoicesCount` recovered to 0 after every alarm-off (no leak). The earlier "~20% drop" was a log-latency artifact. The alarm klaxon (`ALARM3` slot 162) is a *continuous, gapless* infinite loop — a real GE alarm pulses — so the leading remaining explanation is **perceptual** (the drone masking gunfire, and/or slot-162 mixed too loud vs N64), or genuine 8/8 starvation only on a heavy level not yet tested. Needs a user repro. | MONITORING (M-77c: user reports the alarm is acceptable in play after D206; no fix shipped) — **the voice-starvation hypothesis did NOT hold up (M-77b).** The designed last-resort LOOPED-preemption pass was built, and instrumented drop counters (`[D207-DROP]` at both `sndDisposeSound` no-voice sites) + a `[D207-YIELD]` trace were added. Result on BUNKER1 (`GE_FORCEALARM` + scripted sustained fire, ~85 s): **zero true drops**, the last-resort pass **never fired** (pass-1 always found a non-looped victim), and `g_sndAllocatedVoicesCount` sat at 1 during quiet alarm and recovered to **0** after every alarm-off — no leak, no permanent starvation. The earlier "~20% dropped" figure was a measurement artifact (log-line latency, not real drops; every requested sound eventually got a voice via the `unk38` retries). So the fix was **reverted** (kept: nothing in `snd.c`; D206 `-1` only). BUNKER1 combat is too light to peg the 8-voice pool. **Next session needs a real repro from the user:** which level + weapon, and a `GE_AUDIOTRACE=1` capture at the failing alarm — is it (a) genuine 8/8 starvation on a heavy level (Facility/Silo/Statue firefight), (b) a leak that only triggers on a specific alarm-stop path, or (c) perceptual — the continuous klaxon drone masking gunfire / the alarm mixed too loud (check `ALARM3` slot 162 volume vs N64). Temp `GE_FORCEALARM` probe kept in `src/game/propobj.c` for that work. **M-78: re-added just the `[D207-DROP]` counter (NOT the reverted last-resort pass) at both `sndDisposeSound` no-voice sites in `snd.c` (gated on `GE_AUDIOTRACE`), logging `state`/`prio`/`flags`/`count=N/max`, so the user's real-level capture is decisive between (a)/(b)/(c). Static re-check of `ALARM3` slot 162 this session: `sampleVolume=80` (vs gunfire 90-110, punches 100-110 — the klaxon is quieter per-sample, not louder, weakening the "mixed too loud" half of (c)); `decayTime=-1` + `keyMax=8` (`&0xf0=0` → NOT `SOUND_FLAG_RETRIGGER`) → it is a continuous looped sound by design on N64 too, the pulse is baked into the 225→7512-sample ADPCM loop body. So (c) narrows to "the continuous drone masks gunfire" or a loop-point playback defect; (a)/(b) still need the heavy-level capture. Launcher `build-pc/d207_run.ps1` added (forced-alarm auto-repro on level_09).** |
+| D205 | **PC plays wrong/extra SFX for gameplay events the user can A/B against N64: general gunfire has a slap/glass layer audible on PC but silent on N64; an explosion plays a soldier-scream sample; armor pickup plays a wrong sample; unarmed melee (slap) plays Klobb's shooting sound idx 106 instead of the slap effect (M-71/M-72, user by-ear + N64 A/B).** **M-74 WITHDRAWS M-73's root cause.** M-73 read the user's combat capture as guards stuck re-triggering fire sound idx 109 ("256x/29.7 s, no bullets") and pinned it on `stanTestLineUnobstructed` LOS over converted collision geometry. Re-counting the same file: idx 109 is requested **128x** not 256x (the double-log artifact D204 already corrected for M-63 on this very index), = 4.31/s across ~11 guards = ~0.4/s each, **~6x UNDER** the AK47's own `SoundTriggerRate` (`RATE_AK47`=4 ticks => 15/s ceiling) — so the `field_178` gate never binds; and impacts are plentiful in the same window (~30 ricochet/wall-hit 19-41, 69 x2 flesh, 12 body-falls 123-132, 14 yelps 134-147). The eye-catching monotone sweeps 134->147 / 123->132 are the ground-truth round-robin `male_guard_yelp_counter` (`chraction.c:2454-2470`), faithful, not a broken selector. **The 109 traffic is normal in-spec guard combat**; do NOT open the pccg-stan/LOS geometry investigation on this evidence. Everything upstream of presentation is proven: bank 261/261 identical (M-71), sample+pitch exact (M-68/M-70), and every index in the capture correct (182 explosion x1, 81 armor x1, 46/47/48/49/105). **Remaining untested layer = spatial presentation (per-voice volume, pan, concurrency)** — it explains all four complaints at once (a wrongly-placed sound is by ear a sound at your own position) and is the youngest code in the stack (`sndCreatePostEvent` was fully stubbed by D138 until M-65). **M-78: CLOSED.** All four symptoms were D206 (the +1 bank-slot alias). (3) armour + (4) melee->Klobb + (1) slap/glass over gunfire: user by-ear A/B vs N64 = PASS (M-77c). (2) explosion->scream was thought NOT explained by D206 (169-183 -> 168-182, all still explosions) but the user re-tested on Bunker post-merge and the explosion SFX is now correct by ear — the earlier "scream" was a coincident guard death-yelp (GET_HIT_MALE 134-147 seen +/-1s of the blast in M-73's capture), faithful N64 behaviour, not a wrong sample. No presentation-layer bug: pan audit (M-74) already showed GE never spatially pans SFX (252/261 bank sounds `samplePan==64`, no `AL_SNDP_PAN_EVT` poster). | CLOSED (M-78) — root cause was D206; all four symptoms resolved + user-confirmed by ear vs N64. No separate presentation-layer fix needed. | 
 | D152+ | D152 addendum (M-31): static audit of every compiled-audio `osSetIntMask(OS_IM_NONE)` — **all balanced**, no unbalanced early-return. Real fixes: `sndSetSfxSlotVolume` now holds the mask across its list walk (matches its twin `sndDeactivateAllSfxByFlag`) + `sndApplyVolumeAllSfxSlot` batches the slot loop under one recursive hold (kills the fade-out lock-acquire storm); `portThreadWrapper` calls `imThreadExitRelease()` on thread exit (kills the "transient thread acquired `OS_IM_NONE` and died" leak + the pthread-id-reuse re-wedge). Steal-lock kept as backstop. | FIXED (`src/snd.c`, `port/src/libultra.c`, `#ifdef PORT`) — fade-out repro playtest-gated, not headless-verified |
 | RC3 · D167 | **Non-power-of-two texture wrap period (`docs/dev/TEXTURE-GLITCH-ANALYSIS.md` §6 RC3 — "textures repeat oddly", residual Depot-ceiling noise after D161).** The N64 RDP masks the texel coordinate of a wrapping render tile at `1<<mask`, and GE sets `mask = texDimensionToMask(dim) = ceil(log2(dim))` (`src/game/tex.c:361`), so a non-PoT tile (Depot's 65×65 / 96×48 / 56×56 room surfaces) repeats at the **next power of two**, not at its image size the way GL `GL_REPEAT` does → the pattern is squashed/stretched and the seam lands in the wrong place. fast3d never stored `masks`/`maskt` at all (`gfx_dp_set_tile` dropped them) and wrapped purely at the uploaded image dimension. **Fix (`port/fast3d/gfx_pc.cpp`, behind the existing `Video.WrapFix` knob, default OFF):** store `masks`/`maskt` on the tile; in the hoisted per-texunit pre-wrap block in `gfx_sp_tri1` (D74 block — already lifted out of the vertex loop, indexed by texunit `t` not vertex `i`), when the tile is WRAP (no CLAMP/MIRROR bit) and `1<<mask != tex_width`, fold the UV at the N64 period `1<<mask` and clamp the `[dim, 1<<mask)` overflow band (which is a TMEM smear on console, no real texels) to the last texel so it reads as an edge streak instead of a bogus early image restart. `GE_WRAPFIX=0/1` env override added (env wins over the ini, matching `Debug.FrameDump`). **Per-level captures (`-level_09`/`-30`/`-34`/`-20`, WrapFix OFF vs ON, `GE_PCDUMP` 6-frame windows):** no crashes, 6/6 frames each; on settled/comparable frames Silo is ~pixel-identical (phash 0–11), Facility 180–260 pixel-identical, Depot shows small localized texel changes on ceiling/wall cells (dmean 5–9, no structural break); the large per-run deltas are all the D117 intro-camera-pan nondeterminism, not the fix. Default kept **OFF** — no regression, but a headless structural diff can't confirm the Depot ceiling actually looks *better*; needs a human eyeball with `Video.WrapFix=1`. Default-off is byte-identical to golden (all new behaviour is inside `if (g_wrap_fix)`). D74's dead in-vertex-loop wrap block was already reworked/hoisted at M-30; this only adds the mask-period trigger. Confidence: **medium** (mechanism correct; overflow-band handling is an approximation, not exact TMEM-smear emulation; visual win unconfirmed). porting-notes.md §D. | KNOB ADDED, default OFF (`port/fast3d/gfx_pc.cpp`). Needs user visual check on Depot. |
 | D168 | **`GE_PCDUMP` / F12 PPM captures were vertically flipped — the entire source of the bogus D114/D116 "HUD/text X-mirror" (M-33, developer-confirmed).** `gfx_opengl_dump_bound_fbo` (`port/fast3d/gfx_opengl.cpp`) wrote `glReadPixels` output straight to a P6 PPM. GL framebuffer origin is bottom-left; PPM P6 is top-row-first — so every capture (and the `tools_pc/golden/` set, and every screenshot pasted into the finding log since M-6) was upside-down. On real hardware / an actual screen the game renders correctly (developer confirmed). The successive D114→D116 "shared fast3d mirror" investigations — each of which found *every probed stage clean yet the output "mirrored"* — were reading an inverted capture and pattern-matching upside-down asymmetric content (text, guards, the Nintendo logo) as "mirrored". Fix: emit PPM rows bottom-to-top. `tools_pc/golden/*.png` flipped in place to match (see `tools_pc/golden/README.md`); regenerate from a real run when convenient. **Not runtime-verified this session** (no ROM / toolchain in the migrated tree — see the migration note) — needs a fresh capture to confirm text reads normally. Confidence: **high** (mechanism is unambiguous; developer has hardware confirmation the screen is correct). porting-notes.md §D2. | FIXED (`port/fast3d/gfx_opengl.cpp`); D114 / D116 reclassified as capture-orientation artifacts (below). |

src/snd.c

@@ -388,6 +388,12 @@ void sndHandleEvent(ALSndPlayer *sndp, ALSndpEvent *event) {
                                 alEvtqPostEvent(&sndp->evtq, (ALEvent *) event, DELTA_1_MS + 1);
                             } else {
                                 // No lower-priority sound to preempt, so stop the sound.
+                                if (getenv("GE_AUDIOTRACE")) { /* D207 diag: SFX actually dropped (pool full, nothing preemptable); remove with the D202 probe set */
+                                    geTracePrintf("audiotrace.log",
+                                        "[D207-DROP] site=preempt-scan state=%p prio=%d flags=%d count=%d/%d\n",
+                                        soundState, soundState->priority, soundState->unk3e,
+                                        g_sndAllocatedVoicesCount, sndp->maxSounds);
+                                }
                                 sndDisposeSound(soundState);
                             }
                         } else {
@@ -396,6 +402,12 @@ void sndHandleEvent(ALSndPlayer *sndp, ALSndpEvent *event) {
                             // Perhaps it would be better to look for a sound to preempt, just like when the limit is
                             // reached. It's strange that we only check for sounds to preempt when the limit is reached,
                             // but not when it hasn't been.
+                            if (getenv("GE_AUDIOTRACE")) { /* D207 diag: dropped on the "limit not reached" path; remove with the D202 probe set */
+                                geTracePrintf("audiotrace.log",
+                                    "[D207-DROP] site=no-limit state=%p prio=%d flags=%d count=%d/%d\n",
+                                    soundState, soundState->priority, soundState->unk3e,
+                                    g_sndAllocatedVoicesCount, sndp->maxSounds);
+                            }
                             sndDisposeSound(soundState);
                         }
                     }