My experience with USB mic is very bad. You are lucky enough to get mic detected.. just wondering what make (model) you are using.. aka find out for me using dmesg | grep -i usb.

I wanna use my USB headset

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Rocky Jr.
You may have my body & soul, but you will never touch my pride!

If you have knowledge, let others light their candles at it.

Certified to work on HP-UX / Sun Solaris / RedHat