Novice here, on my DO100 I am getting rapid, loud, startling popping noises if I drag around the volume slider in windows with nothing else playing... it's kind of like the transient popping you get if you turn off the source before the amp except there's several in a row at regular intervals and rapid like a quick burst of semi-auto gunfire. It's actually enough that my speaker drivers visibly move a few mm each pop. It's consistently reproduceable in USB2.0 mode but in USB1.1 mode it rarely and seemingly more randomly happens. The volume level on the DAC has no bearing on the popping volume, and changing USB ports did not seem to do anything either. The popping doesn't happen when using RCA out. It happens on both XLR channels, i.e. it occurs on both at the same time, and if I unplug one the plugged one will still have it.
My setup is a bit janky, as this is thru XLR to my cheap amp to speakers. But I am using a monoprice XLR to RCA along the way to the amp as the amp only has RCA inputs (and the DO100 RCA output is in use by a sub). Is it possibly related to going from balanced to unbalanced? Not very knowledgeable about balanced cables at all, though it did not sound like the typical hum/noise. I do have an amp on the way with balanced inputs but I'm wary of directly trying it out as the amp does not have preamp/volume control and I would like to not blow out my drivers. Anybody experience this issue or know what it is? Thanks
edit: I did see a few mentions of popping elsewhere in this thread, but at least as described seemed to be happening under a bit different circumstances, and no definitive explanations on the cause.