371cd0d610
150 s boot with --apu=alsa --mute=false, tee in front of the paced pulse slave. PulseAudio monitor, default 5.3 ms 39.3 percent silence 30.5 gaps/s PulseAudio monitor, 200 ms 15.6 percent silence 3.5 gaps/s PulseAudio monitor, 500 ms 50.1 percent silence 1.3 gaps/s ALSA tee to paced pulse slave 9.98 percent silence 8.37 gaps/s 106.2 s captured over about 151 s of wall clock, i.e. 0.70x real time: the file is SHORT rather than gap-riddled, which is the intended trade. Six distinct channels, no duplicates, sensible peaks. A format trap worth recording: xenia s ALSA driver is SND_PCM_FORMAT_FLOAT_LE and its log confirms 6 channels, so the raw tee is float32 and not s16. Reading it as s16 yields a plausible-looking file whose giveaway is peaks alternating exactly -0.00 / -4.82 across channels -- the two halves of each float landing in alternate channels. I measured it wrongly that way first. The residual 10 percent silence is not removed, but its meaning has changed. It is no longer invented by PulseAudio s monitor; the tee records exactly what Xenia wrote, and Xenia wrote silence, because its writer thread pads whenever the guest has not filled the ring. So the capture is faithful -- every sample in it is a sample the emulator emitted -- while the emulator is still padding, because the guest runs at about 0.7x real time here. No capture method can remove that. So this is a 3.9x improvement in silence and a change of attribution, not a clean capture. At 9.98 percent and 8.37 gaps/s it sits right on the port s fail bar, and should not be treated as an oracle without saying which side of the line it fell on. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01QsEPXWVaEpyfudtR6re1Pd
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.