Originally Posted by regal
Um, yes it does downsample if you send it a 44.1khz RBCD signal, it is recieved from the computer thru 48khz USB with the information for the PLL to put it back to 44.1. Its a great transport because it does this bit-perfect. Now if you send it 48khz or 96khz there is no downsampling. It is ideal for those formats. That's why I suggested a good upsampler for the computer so you avoid that extra step of jitterery PLL when playing RBCD 44.1khz.
And yes the Hiface has 2 Xo's.
Originally Posted by thoppa
Haha...oh no it doesn't....oh yes it does....oh no it doesn't....we're gonna get into children's panto here.
I suggest you buy one, download the driver and try for yourself. ;-) and then compare 96/24 through both.
If you do know any way to modify this other than the xo and power, I hope you'll say.
I think that regal didn't express himself clearly, so I am going to jump and try it another time.
The Teralink-X2 has only ONE clock. It is 12 mhz and so it is a perfect multiple of 48khz and 96khz.
When the Teralink X-2 receives 44.1 data, it has to derive/generate a 44.1 clock from the 12mhz clock. When doing so, it generates a lot of amount of jitter.
So let's suppose for one instant and that you got your hand on a rubidium clock that has a vanishingly low level of jitter. That accuracy of the clock would be pointless on the Teralink-X2 since the 44.1 clock (not data) has to be generated through a PLL. The jitter will be equal to that of the PLL. So whether you have a 0.0001 ps clock or a 1ps clock, most jitter will be generated by the PLL and not by the clock itself.
So the weakest link in the Teralink-X2 is probably the PLL and not the clock itself.
Also, keep in mind that since the Teralink-X2 is an adaptive usb model (and not async), its master clock is the one used in the computer and not the one inside the teralink. While putting a better clock might help. It is not the same as putting a higher quality clock on an async device where the devices use their internal clocks as master clocks.
So to sump up, Regal idea to upsample data to 48 or 96khz is an excellent idea (if the upsampler is transparent enough). It would get rid of the jittery generating of the 44.1 clock.
BTW, the Teralink X2 (and X) are not the only devices handicaped by using only one clock (instead of 2). If you read the Musiland thread, you will see that it was so poor at generating the 44.1 frequency (before drivers update) that some DACs couldn't lock at 44.1 (while they did at 48 and 96).
I hope this will clear up what regal said.
ps: I will be away from the computer for the next 1-2 days, so I won't be able to respond