Yes and I will probably throw in the Exasound E32 in the mix too.ADI-Pro vs D7s
... or is this teaser to what’s to come?
(get pop-corn)
Sounds goodYes and I will probably throw in the Exasound E32 in the mix too.
Not Amir, but maybe I can answer.Sorry, should have made my question a bit more clear: Does the X-USB + D50 still show the jitter? Or is it reclocked out?
Not Amir, but maybe I can answer.
The X-USB has its own clock for the outgoing SPDIF signal. That will go toward the D50. So the D50 will lock to that with a PLL with a good chance most of the jitter is part of the PLL.
Amir is saying better DACs that include USB will have a good implementation and since they will use a local clock to do the conversion it will have less jitter than going thru a converter like this and into another DAC.
So specifically, using the X-USB to feed the D50 is going to have more jitter than simply feeding USB to the D50 itself. Incidentally this will be true even with reclockers, because no matter how well the signal is reclocked using a PLL to lock onto an external signal has more jitter than a crystal clocking the data locally.
Most DACs not named Schiit don't have a problem with noise from the computer. It doesn't hurt to go optical though.Thanks, that was kind of my understanding of it, but what I thought Amir was saying here:
"I first started with Topping D50 but there was little difference of note there. So I tested with Schiit Uber 2. Here there were clear differences between the three devices under test."
Made me think that the D50 was somehow correcting the X-USB jitter(?).
The reason I'm interested in devices like the X-USB (and it seems the D10 does USB to optical conversion too) is that using optical, they have the benefit of isolating the dac/amp from the potentially noisy laptop.
Optical usually has more jitter vs USB though, as long as the implementation is clean.Most DACs not named Schiit don't have a problem with noise from the computer. It doesn't hurt to go optical though.
Optical usually has more jitter vs USB though, as long as the implementation is clean.
It is not. That jitter is inherent in the S/PDIF interface of D50 since it shows up with my Audio Precision as input.If the <1k noise on the D50 reading is being generated by the X-USB, why is it not visible on the Modi2 reading?
Two possibilities:If the 7k noise on the Modi2 reading being generated by the X-USB, why is it not visible on the D50 reading?
Ah, I found the cause of those extra spikes: they are due to the activities of the front panel on D50! I was doing some other testing and noticed that the same noise popped up and then went off. It was synchronous with the display timing out and shutting off. So there is really no issue here with the S/PDIF input or SMSL X-USB. Just something for D50 owners to be aware of.OK, here is the test with D50. Seems like my memory was faulty as there is a difference:
View attachment 11429
The increased noise components persisted when using Toslink.
To see if that is created by X-USB or Topping D50, I tested the latter using my Audio Precision analyzer S/PDIF output and same noise was there.
So does this change your initial measurements?Ah, I found the cause of those extra spikes: they are due to the activities of the front panel on D50! I was doing some other testing and noticed that the same noise popped up and then went off. It was synchronous with the display timing out and shutting off. So there is really no issue here with the S/PDIF input or SMSL X-USB. Just something for D50 owners to be aware of.
You mean for D50? If so, no. It has a nice auto-on, auto-off display so once the music starts playing it shuts off and the noise goes away.So does this change your initial measurements?