Which transport with my Jay's Audio DAC?

The CXC is 44.1 and doesn't do OS .

Thanks, 100% on this, as my discrete 2r2 dac with DSP chip, it can get it’s code completely wiped if I change some programmable features using a cd file that played into it other than pure 44.1, I know my Linn CD12 as a transport is 44.1 but nowhere could I find if the CXC was.

Cheers George

CD transport shouldn't do OS this is the DAC duty.

Sorry, Sir [itzhak1969] forgive me for saying so, but you really don't know what you are talking about in the particular terms laid out in the OP. 

The OS-capable DACs I am acquainted with and discussing here, the Jay's Audio DAC and the Denafrips Pontus, will not perform an OS conversion of an incoming digital signal sent from a transport unless that transport sends an OS signal. It's that simple.

If the Jay's DAC and Denafrips Pontus receive a 44.1K signal from the transport, they convert a 44.1K signal into an analogue signal and send that along to the preamp. If they receiv an OS-ed signal, say a 96K one, they convert a 96K signal into an analogue signal and send that along to the preamp. It really is that simple.

Yes, yes, the Jay's Audio and Denafrips OS-capable DACs have the necessary capacity to OS. [A near tautology, that.] But a necessary capacity is not a sufficient condition. They require the assistance of an OS-capable transport.

Now, there may be OS-capable DACs out there that have on-board capacity to OS an incoming 44.1K signal, say, to 96K, convert that to an analogue signal, and send that along to the preamp. I don't know about that. But the DACs under discussion here do not.

Thus my quandary.

The best I can tell about the NuPrime digital transport (CDT-8 PRO) and companion DAC (DAC-9) is that the CDT-8 PRO transport can be selected to up sample to higher sampling rates ONLY for the purpose of digital stream data transmission via a compatible digital cable to a downstream DAC (e.g., NuPrime DAC-9) capable of receiving and processing that data stream for a particular digital cable and input. That DAC processing can be done with the received input native digital signal rate from the transport, or with some up- or down-sampled digital signal rate once in the DAC.

That is--and despite what the NuPrime CDT-8 PRO manual and literature states--the NuPrime CDT-8 PRO does not up sample and then down sample to the target signal rate before sending out its digital data stream to the downstream DAC. My Theta DAC confirmed that only the CDT-8 PRO output streams clocked at 44.1kHz and 48kHz would lock on the Theta DAC input receiver.

And I am not convinced that one can strip jitter from a data stream simply by applying up sampling and down sampling tricks. As I said, the native output circuit jitter is quite high from the CDT-8 PRO. Maybe Steve Nugent can chime in on this point.