Well, it's been a while since I last posted about this problem -- see here : https://www.raspberrypi.org/forums/view ... p?t=159261 . My problem is that, when playing audio files from my Raspberry Pi 3 Model B+ over USB to my Schiit Modi 2 Uber DAC, I experience popping noises and other hiccups. I had bought a Schiit Wyrd through which I'm feeding the USB input of my Schiit Modi 2 Uber, along with two AudioQuest JitterBugs. For a while, this setup worked, and I experienced popping only very infrequently, but, when I set up my new RPi 3 Model B+, the popping and stuttering returned and it was worse than before.
My current audio setup it RPi->Schiit Wyrd->->AudioQuest JitterBug->Schiit Modi 2 Uber DAC->Nano Patch passive volume control->M-Audio BX8 DB2 studio monitor speakers. I've tested playing mp3s and also FLAC and ALAC files with JRiver Media Center 24 and also just mplayer and I experience the same problems in each.
If I stream over DLNA from my RPi to my Sony blu-ray player and then to my Schiit Modi 2 Uber via coax S/PDIF, then I hear no popping -- I get the same result if I listen to a CD on my blu-ray player. So, the problem is with the RPi.
I'm running the latest and greatest version of Raspbian along with the latest firmware from rpi-update.
This problem first presented itself to me way back in 2014 or so after I was using the plain old RPi B+. After an OS update, I started experiencing popping and other distortion over USB to my Schiit Modi 2 Uber DAC, when the audio had been glitch free for months, at least. I don't know what the problem is but one would think that the RPi wouldn't have this problem anymore...
Any help or suggestions would be appreciated...