Razer offers its Razer Surround Personalized 7.1 Gaming Audio Software for Windows for free. Even better, you will also be upgraded to Razer Surround Pro for free if you download before June 30. That's tied with our mention from last fall (although that lacked the free upgrade), $20 off, and the lowest price we could find for this virtual surround sound engine. Offer ends June 30.

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