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Sylpheed/docs
sylph-decoder b82f75979e re: the dual-mono explanation for the extra stream bytes does not generalise
The port chose a voice presentation on the argument that ADV chunk 1 is
mono-in-stereo and chunk 2 is dual-mono, so chunk 2 s extra bytes encode a
duplicated channel rather than fidelity -- which would explain its higher
declared PsuedoBytesPerSec without appealing to encode quality.

Their ADV channel measurement stands. The generalisation does not. If stream 3
were systematically the same take with its channel duplicated, its size ratio to
stream 2 would be tight across the 28 three-stream cues. Measured:

  min 0.0778 (S00A, the silent one)
  median 1.2565
  max 2.9163 (S06A)
  sd 0.5057
  within 15 percent of 1.0: 12 of 28

A 37x spread is not a duplicated channel, and the declared rates scatter with
them -- S06A is 5661 against 16513 B/s. Whatever distinguishes the three streams
varies per cue rather than being a fixed channel-configuration triple.

This does not touch the port s decision, which is to take the loudest
presentation: that is a per-asset content measurement, not a structural rule, so
a scattering ratio cannot undermine it. It touches the explanation, which should
not harden into a fact about the format.

Two curiosities recorded: S12B s three streams are byte-size identical at 14396
each, and BIRD_224 is 3-stream while being a non-movie cue, so the shape is not
exclusive to cutscenes.

Also narrows the settle-time page s own generalisation. The port measured its
boot the way this corpus measured the game and found the sequencer NOT late --
its 0.6 s discrepancy was arrival-to-arrival timestamps compared against visible
spans, the plate-delay trap in a second place. So what is supported is that
rest.t is the wrong landmark for the TITLE, not that everything paced off it is
late. And the offered re-take of the one-run menu figures is recorded as
declined, with the reason, rather than left looking unfinished.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QsEPXWVaEpyfudtR6re1Pd
2026-08-29 15:37:46 +00:00
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