Distortion using Node 2i as streamer with Denafrips Pontus Dac


Hi all, has anyone had trouble with distortion when coupling a Node 2i streamer with a Denafrips Pontus Dac? 
I have tried using an optical, coax and usb connection from my iMac and after about a half hour to an hour I get distortion from both left and right speakers. 
On Alvin Chee’s recommendation I turned off the “Audio Clock Trim in the audio setting of the Node 2i but I still get the same distortion. 
I did have success being able to stream cd music from an Oppo CD player using an optical cable. 
Has anyone experienced similar problems? Any luck getting it resolved? I’ve only had the Pontus for a few weeks. Any suggestions would be helpful. 
I am thinking about trying another Node 2i to hear if I have the same problems. 
Bill
wgs57
Hmm, well I am trying to figure out the distortion I am getting. I don’t think it’s the Node 2i creating the issue. I am going to upgrade the firmware of the Pontus Dac and see what the results are. Alvin Chee of Vinshine is very helpful but his location is in Singapore and I am in Canada so I can’t just drop in for some help but he is offering lots of guidance over email which I will follow and provide feedback. I am sure we will get the problem resolved. 
Bill
I am thinking about upgrading the streamer but I spent my budget on the Dac which was around $2,000 CAD. I do want to keep the Node 2i for the time being until I can afford something better. A few users have same some good recommendations but I may just go with the Roon Nucleus next year. 
King Barbuda, yes I did know there was no usb output on the Node 2i...I wish it had one though. Do some streamers have that feature? I am still very much new at this but I had assumed usb out was for computers, maybe tablets? 
I'd recommend looking at Sonore's offerings. I have the Node 2 (gen 2) and when I switched to Sonore's entry-level microRendu the increase in fidelity was an obvious improvement. Their newly-released microRendu sells for a mere $400. Moving up in their line is supposed to be "better". I have no experience otherwise but it's a path you may want to explore. 
Do you use the volume control on the BluOs app?

There are settings for audio fixed and variable plus EQ.