"I noticed the same soft white noise continues a second or two after the
phone plays any sound from any app, but then turns off. I presume there
is some time out turning off some part of the audio subsystem.
Presumably if there is a reason, it should happen even when the app
causing the sound to play is not active."
So, I believe pulseaudio, by design, maintains active status briefly (ie
a second or two) when a connection from an app terminates, so that if
two sounds a played back to back there is continutity for the underlying
hardware.
I think that's a separate bug (and possibly by design) than an annoying
noise happening, which seems to be MX4 specific.
Sadly, so far, finding people with the deep knowledge of the android
underpinnings of MX4 is proving tricky.
** Also affects: arale
Importance: Undecided
Status: New
** Changed in: arale
Status: New => Confirmed
** Changed in: canonical-devices-system-image
Status: Triaged => Confirmed
** Changed in: pulseaudio (Ubuntu)
Status: Confirmed => Invalid
** Changed in: canonical-devices-system-image
Milestone: 12 => backlog
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https://bugs.launchpad.net/bugs/1477838
Title:
Crackling sound after playing audio and suspended
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