Play sound without blocking system sleep?

[Paul Marks]

I just made this extension that uses an offscreen document with AudioContext + createOscillator() to play an inaudible sound in order to stop my speakers from popping when the audio system changes its power state, when my Chromebook is connected to an external monitor.

https://github.com/pmarks-net/endlesswhisper

This completely solves my sound problem, but I notice that when I leave my Chromebook sitting idle, the device no longer turns off the monitor and enters standby.

Is there some way to play sound (or otherwise keep the sound system from sleeping) without interfering with the Chrome OS systemwide sleep/wake cycle?  It's fine if the sound stops while the Chromebook itself is asleep.

[Paul Marks]

Never mind, I think I fixed the problem by monitoring the 'chrome.idle' API:

https://github.com/pmarks-net/endlesswhisper/commit/cedc1cf7068649e8b18b836d0bfc3652d1fc7c33