I’ve been doing this long enough that I should have known better. But here we are. Over the several years that I’ve owned a Sound Devices USBPre 2 I’ve chronically fought a weird crackling noise on playback. It’s independent of signal level, source application, sampling rate, type of source file (mp3, wav, Smaart’s pink noise gen, etc.), and every other variable I could think of. It could often be made to go away by replugging the USB connection (clue). I never heard it going the other way using the USBPre as a source (recording mode). It got especially bad the last few days while I was doing a full system reacquaintance (how do you work this thing?) and checkout.
Well, the title says it. I swapped USB cables and problem gone. I rounded up all my USB cables and they all appear to work fine except this one. Silly me to assume that digital connections either work perfectly or not at all.
--Frank