Hi Elias,
It's always great to have a company stand behinds it products but some of what you posted here differs a bit from my experiences. So let me question some of the statements you made in order to avoid any confusions on this forum.
1. If your sound card driver uses kmixer than the bits will get altered even if only a single stream is playing. What procedure did you use to test this otherwise? You'd be the first to come to a different conclusion.
2. The Windows standard USB driver uses kmixer and any USB audio device using the standard driver will not work bit perfect unless you use kernel streaming. Vista which does not have kmixer anymore uses a different mixer but is still not bit perfect. Is Benchmark shipping with a different USB driver?
3. I was also intrigued by your statement of a clock recovery system in the DAC1. Is that a new feature in the USB model. As far as I understood up to now, the DAC1 does not use any form of clock recovery at all but is using an AD1896 asynchronous sample rate converter running at a fixed frequency. While that reduces jitter is also changes all the samples in the process and therefore the DAC1 never actually plays bit perfect. Is that not correct?
Cheers
Thomas
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