Current questions and answers regarding the map editor.

No, it shouldn't affect anything. During export, the sound is included in the game resources as a mod, so the operation of the xdb file is only affected by the string

0DDC8CCB-CD23-479D-938A-FE06F27625BF

, which essentially represents the name of the exported file. And this

is just the path used during export. But here's the question: Are you sure the export was successful? To check, you can go into the h5m archive, find the sound with the name mentioned above, and try playing it in an audio player.
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And yes, you know in what format links to xdb files are given, right? You need to append the pointers to the end.