how do I get ubuntu to recognize my external sound card?

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http://www.ubuntux.org – I have an internal sound card from a manufacturer not supported by ALSA. So, I got an external USB sound card from a friend. I cannot, however, get the card to even show up as an option on System-Preferences-Sound-Hardware. I also tried pulse audio volume control, also does not show up. When I type "lsusb" in terminal, it confirms that the device is plugged into the USB port, but I can't find anywhere where I can access anything related to the sound card. Any help is appreciated. New at this. Thanks (Distributions)