I encountered a strange one this morning. Listening through an LG V20 directly to the earphones (no external DAC is present) and on an album I've not listened to for ages. Anyway, there were lots of audible and annoying clicks and cracks, especially on drum beats and other parts that require, I assume, more power than the quieter pieces. I thought the file might be wrong, so I tried it on my PC, no such problems. Then I tried it on the phone again through another audio player, also no problem. Back in UAPP and the problem was still there. By sheer luck, the first thing I tried was to set bit perfect mode to "No" (it was set on "When available") and the problem went away immediately. Turning it back on, the problem returns. Very strange. I don't really know enough about it to know what's happening, but that seems like it shouldn't happen, right?