Of the handful of manufacturers building sound cards with the Oxygen HD, Auzentech and Sondigo have the most divergent approaches. Sondigo's Inferno is a basic implementation of the Oxygen HD that takes full advantage of the chip's capabilities but doesn't really push the envelope on features and extras. Auzentech's X-Meridian is a little more exotic, with a focus on output quality and flexibility that goes so far as to allow users to swap out onboard chips. Keep reading to find out which of these implementations we prefer and whether either can challenge the X-Fi's mix of features, performance, and sound quality.

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