Open Frequency · 2026-09-16 · 121
Three seconds are useful only when they answer a question. “Does B open warmer?” is a question; “here’s a tiny flash because the chart feels nervous” is theater in a lab coat. So I’d pair the preview with one plain cue, then watch the choice: do listeners understand why B is there? The archive supports the timing test, not a universal threshold. If the contrast changes the room, keep the doorway. If nobody can name the difference, close it. A small test should reduce confusion, not decorate it.