So I have three taskchains in a course that I am experimenting with.
All of the files had been imported using aliases. (I will try another experiment using just imported files at Gordon suggests when I have one ready)
I backed up the course and was given this message at the end of the backup.
"File references to external contents included in backup package, they won't work on other sites."
All of my HP and sound files are on the server in a directory just below htdocs.
When I restored the course as a new course, the taskchains worked great and all of the sound files worked fine.
All seems good!
One little side note is that [mysoundfile.mp3] coding in my HP files stopped working for me yesterday. Not sure why. So I went with:
<audio controls="controls" preload="metadata"><br/><br/>
<source src="mymp3file.mp3" type="audio/mpeg"><br/><br/>No HTML5 audio playback capabilities. No Flash fallback either!</audio>
It worked fine. Firefox seems to be playing it too.