I am new to Vivaldi. I just got hold of a 3 piece stack (DAC, upsampler and clock). All units are fully upgraded and updated, including the last Mosaic update. So DAC is running v 2.11 and upsampler v 2.10, with network board on v. 503.
I use Roon, with no dsp. My library is AIFF.
Yesterday, while listening with the upsampler output on DSDx2, I experienced some severe stuttering when playing high res files (192/24 and 96/24). It doesn’t happen when playing redbook, neither when using different output settings on upsampler.
I have tried a couple of 24/192 files this afternoon and a few 24/96 files with the Upsampled output set to DSDx2 and I have no issues at all.
While you wait for Andrew who is very knowledgeable to respond here are a couple of questions.
1-Do you have the Upsampler and DAC set to Auto WorldClock?
2- You are using Dual AES connections from Upsampler to DAC
I’m not sure if those are important but I’m having no issues.
This is likely an issue with your clock configuration, especially if it’s only happening when upsampling to DSD with an input rate that’s a multiple of 48kHz.
Cabling
Make sure that the clock cables are routed exactly as shown in this diagram. Be especially careful on the Upsampler as there are 4 BNC connectors in a row and the ones you want are the middle two.
Theoretically you should be seeing a similar problem with DSDx1, but there are a couple of scenarios that I can think of where that wouldn’t be the case.
For good measure you should also check your dual AES settings. On the upsampler you want to be sure that dual AES output is enabled. On the DAC you want to be sure that dual AES is set to auto.
Yes, It was a clock configuration problem. I don’t know exactly why, but group 1 and 2 on the clock were reverting to 44.1. Solved. Thanks for the input
In general, if you encounter a stuttering problem it’s in some way related to clocking. These issues become especially apparent with an upsampler set to an operation that requires it to have access to both clock frequencies (like 24/96 to DSD).
I found out the reason the clock was misconfigured. Today, when I began listening, the clock was 44.1 in group 1 e 48 on group 2. When I played a 24/48 file, group 2 jumped to 96, without me touching it. Is this normal?
Are you saying that the display on the clock showed group 2 changing automatically from 48kHz to 96kHz?
The clock has no idea what the other components are doing and simply outputs the rate as configured. I can see no way in which the clock output frequency would change absent of an external command. Are you using any 3rd party remote control (either via IR or Serial)?
This is what I was suspecting. Unfortunately, RC5 doesn’t provide enough device types to handle things like clocks and upsamplers so the codes had to get “borrowed” from somewhere.
I have a similar issue with a Lutron lighting controller remote. In direct line-of-sight there are no problems, but if I’m not careful the signal reflects off of one of my speakers just right and that reflection interacts with the direct signal. The upsampler sees the combination as the “Output 96000” command.