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On Windows I used to take advantage of acoustic echo cancellation and noise suppression but no such features exist in PulseAudio and haven't since I can remember. My system is a laptop, Acer Aspire V3-571G and you can guess it ran Realtek drivers as usual.

Ubuntu 13.04, 13.10, 12.10, I don't mind which version a fix applies too, as long as it's one of those three.

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for echo cancelling see:… – Takkat Oct 1 '13 at 18:15
up vote 3 down vote accepted

Echo cancellation in Ubuntu can be done by running:

pactl load-module module-echo-cancel
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