... ok... there's good news and BAD news:
a. glad you did convert them to umx format. For that i'd be ever grateful, as well as any other mapper willing to use these great musics on their maps, BUT...
b. the musics (all of them) only play about 23 seconds or so, then restart. I heard them in the editor AND saved on a map - same behavior. They are a little too low but oh welll...
... so, despite all of your best effort, they don't cut in. Now the suggestions are: 3 of the music files are 1.8xx Mb in size, except for the Torlan one (3.5xx Mb something). There are umx files out there that go up to 4 Mb or even 7. That is a good number, because they still are decently "portable" (there's umx of bigger size, but those are ludicrious for zipping and uploading with a map).
Could you take a look at this?...