I'm a bit late to reply on this but I use Pink Faun i2s Bridge. I am using Roon it outputs DSD over DoP to a PS Audio Directstream.
It works well however I am still to find a PCI card that can output native DSD directly to the DAC. The chipset used by Pink Faun is CM8888 which unfortunately at the moment doesn't support direct DSD hopefully a firmware update soon.. Maybe.
I really like the Pink Faun product.
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