Files
Sylpheed/docs/re/f6-two-leaf-periods-prereg.md
sylph-decoder 7c007cc421 re: pre-register the two-leaf period ratio before measuring
pteff03a's declared timeline has never been checked against a capture. The
leaves declare 600 and 720 units, so the periods must differ by 1.200 within
a single capture. Equal periods is the flattering-but-wrong outcome the
batched-draw reading could have produced.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Jc4pciRArGHfxGGhEbwp5t
2026-09-03 19:22:37 +00:00

911 B

Pre-registration — the two sweeps must loop at 720:600

Committed before measuring. pteff03a was only found to be drawn at all in f6-unit11, so its declared timeline has never been tested against a capture.

The leaves declare different loop lengths: pteff03 600 units, pteff03a 720. If that decode is right the two strips must drift apart, with

period(pteff03a) / period(pteff03) = 720 / 600 = 1.200

measured inside a single capture, so no clock or frame rate enters.

if the decode is right if it is wrong
ratio ≈ 1.20, in both captures equal periods (one shared clock), or any other ratio

Equal periods is the outcome that would flatter a lazy reading — one traveller driving both quads — and it is exactly what unit 11's batched-draw discovery could plausibly have produced. So the test can fail against me.