DVC disabled, no change, still crackling noise on Hi-res playback. Reducing pre-amp gain, noise still there. As the original poster stated, changing the sample rate under Hi-res output for the wired headset removes the crackling noise, which is quite loud, but only until playback is stopped and then restarting the playback and we're back to noise. This might be a problem with Hiby devices since the original poster has a R5 model and I have a R6. Sure would be nice to have a fix though since PA is the best Android music app out there.