I've been catching up on the Head Fi Valab forums today. I haven't looked in a while. Apparently Gigalab made the 2nd clock an addition to their Moon DAC then strongly flaunted it on eBay against the competition, forcing TeraDak and Valab to update. That's what I gather, anyway.
I emailed Kevin about including an I2S input. I mentioned a need to bypass the clocks when a superior signal is available. His reply simply states "
Ok, I understand your requirement! I will seriously consider developing one version with i2s input. It is not a hard work." A dedicated version would be sweet but I imagine it will be added to a normal production revision of the DAC.
The new clock in the Valab is a small TeraDak board strapped to the top of the DAC section. I got the impression that the second clock reclocked the signal from all the inputs (a second reclock on the USB). Kevin mentions in a current eBay auction page Q/A "
one for usb reciever master clock, another for I2S reclock". Taken literally that means the I2S is reclocked before the DACs, but is it possible to reclock the I2S and run a pure input to the I2S before the DACs?
Link provided for you to get a quick look at the TeraDak second clock upgrade images:
http://cid-1eb7027489224a7d.skydrive.live.com/browse.aspx/Reclock%20installationI'm glad I have the March 09 revision without the second clock for use with the Off Ramp. Thanks for the Cullen Circuits suggestion.
- Rand