External usb sound card is not working correctly

When my computer usb sound card is working correctly. If your computer to sleep and wake up the sound card is working correctly. If you disable the sound card and connect again, it appears extraneous sound on the background music playing. Each time the sound is different. The sound is very similar to not match the sampling frequency. If the computer is rebooted, then the sound card is working properly again.
Soundcard Infra-sonic.com model Amon.
I have not experienced problems when using the same card with Mac OS 10.5.8 with the drivers for Mac OS 10.5
Manufacturer issued driver for Snow Leopard, but the card still does not work correctly.
Also such problems, other users complain about an external USB audio card. None of the users can not find a solution to this problem.

Contact Infra-Sonic tech support.

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