As per the title, my Fuze randomly will play some songs extremely low to the point of inaudibility. I tag using MP3Tag and do ReplayGain with Foobar 2000 (the main tagging is NOT handled by Foobar). The mp3s are all self-encoded at LAME 3.98.2 --preset extreme. The only tags used are artist, title, genre, album, year and track number. The Fuze will play the problematic song low again and again UNTIL I TURN IT OFF AND BACK ON. The next time I turn it on, that song will be fine - another song will randomly become the scapegoat. Firmware has been downloaded and flashed again to ensure viability.
Based on the above, I’m thinking that this is a firmware bug.