I have checked and the Nirvana album is tagged properly.
Yes I know that gapless playback is only possible through Categories/Album. I was asking if Categories/Album only displays files that are loaded on the internal memory and not on an external source such as a micro SD card. It certainly appears to be that way. So in essence not only can you get gapless playback from only the one path, but that one path is restricted to the 8GB internal memory of the player. Until the firmware fix I'd better make sure any files that require gapless playback are loaded onto the internal memory.
Also, another peculiar thing. Some full albums are accessable on their own from Categories/Album but most are just listed by song in a very long list under the heading unknown album, although they were loaded onto the player in the exact same way, and are titled and fully separate under browse files. I wonder why this is?
Also, and this is even more peculiar, with the DVD-Audio album Love form the Beatles, ripped from DVD-Audio Extractor and transferred to the X3 via JRiver Media center 18, if I access the album from Browse Files the tracks are in their proper order, or sequence, and will not play gapless as already established, but if I access this album through Categories/Album the tracks are placed in alphabetical order instead of numerical order, but in the few instances where there are two or more tracks in numerical order, simply by the luck of the alphabetical draw, they will play gapless, which they did not previously on the initial transfer of this album. This is very strange. I deleted and transferred this album again as it was originally on the micro SD card and not the internal memory, thus ultimately the reason why it was not playing gapless. Now if i can only get the track progression correct I should be all set for this file.
I have ripped and transferred both Abbey Road, and The Dark Side Of The Moon, ripped via EAC and transferred via MC18, onto the internal memory and they will both play gapless flawlessly from the Categories/Album header, so it would seem that the issue may indeed be with the Nirvana file, but i can't for the life of me figure out what that issue could be. Like I said i have checked the tags and they are correct and this file plays gapless on MC18, Foobar, and through Windows Media Player, the latter in WAV as flac is not supported in Windows Media Player. The Nirvana file has always been located on the internal memory of my X3.