My set up is a system that consists of a NAS and two DACs.
The NAS is a 64 bit system, powered by an Intel i7-4790K Quad-Core 4.0 GHz LGA 1150 88W Desktop Processor (16 GB Memory) mounted on a Asus H97M-E/CSM LGA 1150 motherboard.
The Roon Core resides in the NAS on a 1TB SSD.
All music is stored on a single Seagate ST8000NE0001 hard drive. There are about 40K tracks in this collection. Most of the tracks are wav formatted – I used dBPoweramp to rip them from CDs. I do have a pretty good number of DSD tracks (probably several thousand).
One of the DACS is a Merging Technology NADAC8 + Player. The server is connected to the NADAC8 via two short runs of Wireworld Chroma 8 ethernet cable and a 40 foot run of Audioquest Cinnamon ethernet cable. The signal is routed through two Ubiquity Routers (UniFi 8 POE-150W and UniFi 16 POE-150W). I use an Apple Time Machine router.
There are five devices that are run out of the NADAC8. A multi-channel (Marantz) receiver and two (Atoll MA100) 2-Channel amps are close by. A stereo receiver (McIntosh) and a multichannel pre-amp (Marantz) with separate amps (SPL Performer s800s) are located some distance away (approximately 40 cable feet away). They are connected via Nordost White Lightning RCA cables, joined by two MuxLab RCA/ethernet transformers (and a 40 foot run of Wireworld Chroma8 and AudioQuest Cinnamon ethernet cables).
The second DAC is an USB-connected Chord DAVE located a short distance from the server. Through it, two channel signal is fed to the McIntosh receiver as well as Audeze LCD-X headphones. There are three speaker zones connected to the McIntosh Receiver.
I do not use WiFi, except to operate remote controls (usually an iPhone or an iPad). For the 6 channel systems, I used AudioQuest Cinnamon or Wireworld mid-range cables and wires.
Signals provided by both DACs are interrupted by “pops” while tunes are changing. However, the DAVE is far less consistent and loud.
The pops for the NADAC-8 are quite loud and probably have contributed to speaker damage, especially in the “main system” with the Marantz pre-amp and SPL amps.
I did change the re-synch delay to 500 ms (on the NADAC8) and this did produce some improvement in the loudnesss of the pop sound. It did not seem to impact their frequency,
In an attempt to trouble-shoot this issue myself, I did replace the Netgear routers with the Ubiquity routers several months ago. It did not seem to make much (if any) difference.
Although the pops are very likely to happen when changing to different DSD levels or from PCM, they seem to happen when changing recordings (i.e. “albums”), even when they are from similar sources.
On the NADAC8 and the DAVE, pops are very consistent when changing from a DSD to PCM recordings.
I also have an OPPO 205 and two television sets connected to the Marantz multi-channel receivers. I do not experience any pops when do not use Roon.
I am including a couple of screen shots – one of the Device Setup and one of the Signal Path.
[update 11/9/19 – the problem described below has been resolved, thanks to suggestions received from Noris. The pop problem remains, despite increasing the resynch time to 1000ms}
I don’t know if this is related or not, but I thought I would mention it. I often experience disruption in play back with anything recorded above DSD64, on both DACs and even in stereo.
Here is a couple of screen shots that show this:
I’d appreciate any suggestions you might have.
I have reviewed other reports of similar problems but have not been able to identify any that are similar.