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Whirring noise in recording via mic - will HW mixing sblive 5.1 help?

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https://bbs.archlinux.org – I'm getting whirring noise in mic recording (adjustng mic and mic-boost does not help) it also happens on ubuntu 11.04; so I guess it is a hardware issue. Strangely, I hear no noise in Windows XP in recording (sound recorder). Whereas in Archlinux, skype, audacity, arecord, gnome-sound-recorder all are having whirring noise.I guess, it might have something to do with Intel Audio, so I'm planning to buy Creative Sound Blaster Live 5.1 (emu10k1), which has Hardware Mixing feature supported by Alsa. Do you know any way to "suppress noise" and "echo cancellation" in a (HowTos)