Hi Alex,
The short answer is that if you are just using such a device as a re-clocker for USB or network audio, it won’t make a positive difference. If you are using it for an SPDIF source, it is unlikely to make a difference on the Bartók. If you are using it as a master clock, it will likely be a benefit provided the source device can also accept a clock input.
The long answer is that if we’re talking about network or USB audio here, then no, there is no benefit to using a re-clocker. These devices try to smooth out problems in jittery sources. Network and USB audio are “asynchronous”, meaning there is no timing information embedded in them anyway, so there is nothing to smooth out. Here, the Bartók will run in Master Mode - it does not have to re-clock, as there is no clock information there to begin with anyway. It just runs at it’s own rate.
For an SPDIF input, you’re essentially betting that the clock and Phase Locked Loop circuitry inside the re-clocker is better than the same circuitry inside of the DAC (in this case the Bartók). We have some really damn good bespoke hardware and software for these, so I would be surprised if a re-clocker (just working as a re-clocker, not as a master clock) made a positive difference. Not the case for all DACs, but with the Bartók I wouldn’t expect it to make things better.
Adding an external clock into the mix is a little different, as that isn’t trying to deal with a jittery source as much as it is a jittery internal clock inside the DAC, among other things. There’s a lot more that comes into this but generally they are a good idea provided you can lock both the source device and the DAC to the same master clock (so your S/PDIF source would need a clock input as well).
Hope that helps! 