I have Nest mini and I used to cast audio from my chrome browser on windows 10 all the time and I never had any problems. I have upgraded my PC to windows 11 and when I cast the audio the voice plays and start crackling. It seems the isn't enough bandwidth and sound slows down, and when pause and play it slowly goes back to normal and the slowness happens again. I am not sure is anyone else had this issue with windows 11.
I am not sure how to get this through to google as I am sure it must be a widespread issue and happens only with windows 11. I think this issue is not coming into mainstream because windows 11 is not widely used yet and not many people cast from windows directly.
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