0f0c6610c4
Continued F2 at the site the previous page named as the first thing to do. dat/sound.pak is a 114 KB index over ~1 GB of payload across sound.p00-p04. Its 9519 entries carry no readable signature at all: the most common first-four-bytes pattern is "...." on 3830 entries and no entry begins with an ASCII magic. Exactly one entry is under 4 KB (#9454, 533 bytes), where a bank header or wave index would be small and structured. So the SE bank's metadata is not reachable as a header in sound.pak. The entries are audio payload, high-entropy by nature, and a gain beside a wave index is not sitting in front of them. Stated as a negative about REACHABILITY, not existence: a per-wave gain could live inside a container these entries are compressed into and I have not decompressed one. Two of three sites now checked, both negative; the executable around sub_821C5580 remains. Classification unchanged at undecodable-with-reach, but better bounded. Records the shape the answer is taking: if the executable also has no per-cue gain, the honest conclusion is that the game does not author a per-cue mix at all and the levels come from the user-facing sound options screen as runtime state. That makes the port's job authoring a master balance rather than transcribing a table -- undecodable rather than decoded, which it must know, because a mix authored in ignorance and one authored deliberately look identical in the file and differ entirely in how far they can be trusted. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Jc4pciRArGHfxGGhEbwp5t
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.