So even after about 10 days I still consider myself in the setup phase of ownership of this DAC and I am still testing connectivity and getting the bugs out.
One weird thing I had noticed was that despite using the ASIO driver the windows volume control and the volume and the mute in mixer was still active. In my experience using ASIO this should all be disabled and the only way to alter the sound is within the source application (if possible) or by the volume knob etc. If the volume can be adjusted in windows mixer then it is going via the kmixer process and it is not bit perfect.
So I went into the sound control panel and disabled the X-Sabre device. ASIO still works via Foobar or JRiver and the sound is audibly better.
Anyone else see anything like this?