sylph-decoder 80ef6ac4e2 re: the container's audio clock is within 1.5 % of real time -- a uniform slowdown is refuted ...

BGM_103's loop bounds are bit offsets in the decoder context, and each wave's
duration follows from its declared byte rate, cross-checked against decoded PCM to
0.007 %. Cycle media length 62.34 / 63.29 s against 61.87 s wall: ratio 0.985,
where a uniform 8.5 % slowdown predicts 1.085 -- 10 % away and on the other side
of 1.0.

The method's error bar is its own 1.5 % self-disagreement between two stems that
must have equal duration, which is why the loop page refused this conversion for a
finer question. It is adequate for an 8.5 % effect.

Does NOT settle the frame clock: audio can hold real time on a timer while
rendering lags, and 27.6 fps and the 8.5 % splash excess are both frame-clock
numbers.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Wuu56cE8vJGTBtn1ppsk8v

2026-08-30 22:45:33 +00:00

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