Thanks for that link to media info, t0nee1.
But I don't think I'll need to use it, at least not right now.
I think I may have solved the problem.
I downloaded a file converter and converted the troublesome file from WAV to FLAC. Then I tried dragging the FLAC file into Burrrn.
Then I converted the file back to WAV. And dragged it into Burrrn without a hitch.
Well, there was one hitch: The converter I downloaded turned out to be crippled, so it only converted 60% of the file each time (I guess I should read the fine print before downloading software, eh?).
So, now all I have to do is find a free file converter and I think my worries are over. Can you recommend one?
This problem has kept me up way past my bedtime tonight, so I've got to shut down this computer and go to bed, or I'll collapse from exhaustion.
But first thing tomorrow morning I'm going to scare up a converter program (I'm sure I've got one on one of my three hand-me-down computers somewhere; I've just got to find it), and then test my hypothesis.
Thanks for sticking with me on this. I really appreciate it!