Does the browser keep playing when the phone locks?
Same pink-noise bed as the engine PoC, routed through an
<audio> element + Media Session — the only path mobile browsers
treat as "media" and may keep alive when locked. The log survives the tab:
lock as long as you like, come back, read the verdict.
stopped
elapsed —
ctx –
sink –
media session –
Protocol
Play, confirm you hear rain-ish noise breathing.
Lock the phone. Leave it 5–45 min. Failure is audible.
Unlock, return here — the log prints how long you were away
vs how far the audio clock actually advanced.
iOS extras: silent switch on, Low Power Mode, take a call.
2nd pass: enable blips, lock 5 min — gaps in blip timestamps
show whether JS timers run while locked.