Want a sound card? Want a cleared sound that is not contaminated by electromagnetic interference in you computer's case? Want that all to work in Linux?

I did. So I got me one of theseUSB sound cards. It arrived today in a tiny padded envelope.

And it works with Linux. Just plug and play. PulseAudio makes it all trivial. The device ID as reported by lsusb is 0c76:1607 JMTek, LLC. The text on the back of the device says 'Model HY544 USB 3D Sound Pnp FC CE Made in China'.