iOS lock-screen audio test

Tap an engine, lock the phone, wait ~80 seconds, unlock, read the log.
Engine C already passed, so start with D — it should fail. Then tick one toggle and rerun.

A  Buffers, just-in-time Next segment scheduled when the previous one ends. What a rewritten player would do. B  Buffers, pre-scheduled All six scheduled before you lock. Isolates blocked audio from suspended callbacks. C  Audio element (control) src + load + play per segment — what the player does now. Expected to fail. D  Player replica Reproduces the player’s exact conditions. Flip one toggle at a time to find the culprit.