[Bug 721239] Re: Mumble uses 10% cpu doing nothing

[Thorvald Natvig]

Even when you are not talking, noise suppression and echo cancellation
will use CPU to keep adapting to changes in the sound environment. If it
did not, there would be a lengthy burst of noisy audio at the start of
every transmission.

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https://bugs.launchpad.net/bugs/721239

Title:
  Mumble uses 10% cpu doing nothing