ef4ea8fe86
Groundwork for the port's ask #4; it does not settle #4. Captured the game's own output over the boot intro following the ALSA file-tee recipe exactly -- paced pulse slave, --gpu=null, both mutes off. 148.02 s, 6ch float32 48 kHz, 0.15-0.16 % silence against the 0.31 % the recipe page records for its own clean run. Provenance is the XMA probe rather than a screenshot, which is the right evidence for an audio question: ADV's three contexts appear byte-exact (1294336 / 1118208 / 1171456), then the documented BGM_102 pair. Five of the six channels carry distinct content; BR is 82 % silent and 11-15 dB down. No channel is a copy of another -- the largest pairwise correlation is 0.70 between FL and FR. That rules out a stereo mix, so 'ship one stream' cannot be right and the port's held-wrong value stays wrong. It does NOT establish that summing is right, and the 6-channel count is Xenia's hardcoded kFrameChannelsDefault -- what is evidence is that five of them differ, which a stereo guest cannot produce. NOT settled and named as such: the stream-to-channel mapping. The cross-correlation of each captured channel against each decoded ADV stream has not been run. One boot, one movie, and --gpu=null means no video cross-check. Raw is 170 MB and is not committed; sent over share to the port. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Wuu56cE8vJGTBtn1ppsk8v
Sylpheed
A clean-room reverse engineering and port project for Project Sylpheed: Arc of Deception (Xbox 360, 2007).
Three things live here, in one repository so that a change spanning them lands as one commit:
| The decoders | crates/sylpheed-formats — the disc's formats, read and verified disc-wide |
| The port | port/ — a Godot 4 project, plus crates/sylpheed-export which converts a disc into the open asset tree it reads |
| The corpus | docs/re/ — what has been reverse engineered, with its evidence, its retractions and its dead ends |
You need your own copy of the game. No game content is in this repository and none ever will be. The exporter reads the disc you supply.
The oracle is the real game
sylpheed-cliand the Explorer are tools for verifying our decoding. They are hypotheses under test and they have been wrong. When something must be checked against the truth, the truth is the game running in Xenia Canary, captured — not any renderer of ours.
This is stated first because getting it backwards is the most expensive mistake this project has made.
Layout
crates/
sylpheed-formats/ the decoders. Disc-wide verified; the corpus is its spec
sylpheed-cli/ headless tools -- render a screen, dump a table, probe audio
sylpheed-viewer/ the Explorer: a human's window onto the disc. STATIC data only
sylpheed-export/ disc -> the open, moddable asset tree
port/ the Godot 4 project. Reads open formats ONLY
authored/ decisions that are NOT on the disc, each with its reason
data/
base/ generated by the exporter. Gitignored, never hand-edited
mods/ drop-in overrides. Yours
docs/
re/ the corpus: findings, refutations, method traps
game/ how the game is navigated -- menus, modals, flight
port/ the port's mission, its handoff contract, modding rules
agents/ how the agent team works together
tools/ capture harnesses, probes, the share tool
exchange/ transient inter-agent files. NOT in git
docker/ the agent containers
Where to start
docs/re/INDEX.md— what is decodeddocs/re/REFUTED.md— what has been tested and dieddocs/re/METHOD.md— traps this project has already paid fordocs/game/navigation.md— how the game is navigateddocs/port/MODDING.md— why the asset tree looks the way it does
Xenia Canary is a separate repository: it is a fork tracking upstream, and it carries our instrumentation.
Conventions
Confidence is per claim, never per document: ✅ CONFIRMED · 🟡 PROBABLE ·
❔ HYPOTHESIS · ❌ REFUTED. A withdrawn result is kept with its reasoning
rather than deleted — that is why the numbers here can be trusted.