probably off topic audio question

[Tom Horsley]

Randomly, if I play a youtube video in google chrome,
I'll get a pop-pop-pop... audio background noise at a rate
of about 1 every half second. If I close the chrome
app, the pop-pop-pop... keeps going for about 30 seconds
after chrome goes away.

Anyone else ever had this happen? Anyone have any idea
what it is?

This is on fedora 24, google-chrome-stable, all updates
applied. The audio output is nvidia HDMI using the rpmfusion
binary drivers. It isn't very frequent, and I can come back
to the same video later and it will often play fine,
so it isn't even reproducible. Nothing shows up in any
logs that I can find or in dmesg.