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Message: <blockquote data-quote="sajunky" data-source="post: 1029169" data-attributes="member: 22308">A nature of USB is that clock stability doesn't matter. Receiving side must take care of a clean clock and pass requests for new samples back to the PC. Problem is in a complexity of galvanic isolation, so you get a noise from PC PSU. However if you place USB receiver on a dirty side and isolate I2S interface (which is a native language of a DAC), you get the best of two worlds: Effective galvanic isolation on one side and simplicity of clock synchronisation with jitter-free fixed frequency clock driving a DAC on the other.In other words, If your DAC comes with I2S input, forget about expensive PSU's, audiophile OS, it is not effective. Get get USB to I2S converter or a multifunction digital interface device like Sinxer SU-1, Gustard U16 or Audio GD DI-20. Just be warned about compatibilty with your DAC, as external I2S interface is not yet standarised.Alternatively Ethernet LAN streaming device which is typically also galvanically isolated, it can be built on the Raspberry PI.</blockquote>