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Being a programmer myself, I know how tedious requests like this can be but...

When I upload a sound file, it comes up with a Quicktime movie box. This makes sense for video, but is extraneous for audio-only files. It wouldn't matter if I was only uploading one file per item, but in many cases I've got multiple sound files for each item. Ideally, I'd like to have each of the status bars right on top of each other.

I know that the thumbnail size can be changed right in the interface, but is there a file I can edit to change the size of movie boxes?

What is the mime-type of the file? It sounds like Omeka is trying to display the sound file as a movie, which could be a problem on our end.