Turning off gapless playback fixed a lot of my problems. I do prefer they fix the gapless play back. I found gapless to play okay with AIFF but has problems with FLAC and MP3 and causes an assortment of crashes...............Jim
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I picked up The Cars Studio Album Collection in 24-bit, 192 kHz FLAC from here:
It is the best test of crashing the X3 with the 2.1 firmware I've seen yet. It freezes up and has to be powered down by holding down the power button at the end of every single track. Occasionally, something weird happens, and it somehow manages to make it to the next track properly (I believe twice out of 60 tracks). Then another couple of tracks, I managed to get it to go to the next track by hitting skip to get to the next one.
But yeah, I'd say 56 out of 60 tracks from it that I've listened to in one runthrough have all failed. This is copied directly from the files downloaded onto my PC via HDtracks' downloader utility, that check out just fine on there, and actually sound really great on the X3 as well (right up to the freeze at the end of every song). I've dumped them to a reliable micro SD card which, prior to this, had 16-bit 44.1 kHz FLAC files on there that played no problem on the X3, so I don't suspect the media either.
I haven't tried turning off gapless playback yet, but I'm going to do that for my next attempt at a listen-through, and report back.
Quick follow up...of course all those Cars tracks play fine without gapless playback on. It's kind of bad though. The gap is not consistent, and sometimes ends up being around 5 seconds (noticeable because a couple of the Cars albums have crossfading from one track to the next). Often, the next track glitches out when it starts playing...the first half second or so are just mangled.
So yeah, at least it doesn't freeze, but it's a far from optimal solution.