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ChrisBeWithYouandClaude Opus 4.8
233f5280e8
The editor/timeline derives per-bar BPM from beat spans (bpm = beats*60/span), which amplifies rounding: at millisecond (3-decimal) precision a constant-tempo GP import (e.g. 140 BPM) shows a spurious per-bar "tempo drift" of ~0.05-0.7 BPM because most bar lengths don't land on a ms boundary (worse for fast/odd meters). gp2rs computes these beat times exactly from the GP tempo map, so the only precision loss is the ebeat/startBeat format string. Writing them at 6 decimals (microseconds) makes the derived tempo match GP's authored value. Verified on GP5 imports (Highway to Hell 116, Equivalence 140, Living After Midnight 138): the derived per-bar BPM collapses from two drifting values to the single authored constant. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_013JgxKh99UAeQqmhzSc73tv Signed-off-by: ChrisBeWithYou <christian.a.cowan@gmail.com>