Just began upgrading from MP3 to FLAC and went on a recommendation to get Poweramp while I was at it for the features, with only one album in FLAC on so far. Initially had issues with scanning either just that album and a couple of random alarm/game audio files, or all my MP3s without it, but every now and then it'd scan correctly only to mess up the next automatic rescan (intermittence is the main thing that keeps confusing me). Fixed this by manually selecting my music files to be scanned, then after a successful rescan turning off automatic rescans, on the logic that as long as it thinks the file is there it'll manage to find the file when trying to play it. Then after a day of commutes to and from work with the player on shuffle I realised none of the new FLACs had played. Investigated by just clicking next repeatedly to see if one came up and saw the "failed to play _" message come up a couple of times. Played one of the files at random from the library with no problem and began to shuffle from there with some fails and some successes even on the same tracks throughout the playlist. I've tried tweaking a few settings to no avail. I'm a relative newb with this stuff, so it's often a matter of changing a setting and seeing if it helps, which none of them have. Would it help to have all my tracks in a single folder? At the moment they're all in one parent folder, but under individual folders for artist and album.