sylph-decoder 68aa19283d notes: run-canary is silent TWICE over, and the 6-channel stream is a red herring
Completes an entry committed an hour ago that was incomplete, which is worse
than absent because it looked authoritative. Fixing SDL_AUDIODRIVER alone still
records silence: run-canary also passes --mute=true on its own command line
(line 98). With the driver fixed and the mute left alone, Canary attaches a
healthy 6-channel stream, holds it at 100 percent volume, reports Corked: no,
and emits nothing. Both layers have to go, and "$@" is last so --mute=false on
the caller s side wins.

Also records that parec defaults to stereo/44.1 kHz and will resample a
6-channel monitor without saying so -- the first successful-looking capture came
back 2ch 44100 from a 6ch sink.

And a red herring I nearly published as a finding. pactl shows Canary s stream
as float32le 6ch 48000Hz with a full 5.1 channel map, which reads as the guest
requesting 5.1 and would have been strong support for the hypothesis that a
voice cue s three streams are 5.1 channel pairs. It is not evidence about the
game at all: AudioDriver::kFrameChannelsDefault is a hardcoded 6, and the code
path actually used, SDLAudioSystem::CreateDriver(index, semaphore, &driver),
constructs SDLAudioDriver(semaphore) taking every default. The format is
Xenia s; only the content of those six channels is the guest s.

That is the same failure this corpus recorded in METHOD earlier today -- the
specific observation and the general rule reading identically -- caught this
time before it was written down rather than after.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QsEPXWVaEpyfudtR6re1Pd
2026-08-29 15:56:24 +00:00

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-cli and 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

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.

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