Quicktime Pro: Can't save AV control changes.

I'd like to use QT Pro to slightly alter the pitch of a few small audio files. It seems to be doing what I want without any problems. But when I save the file, the audio changes don't stick.

Any ideas? I went through the help features, and it seems to be telling me I can just click Save or Save As and i'll be good to go. Not the case.

-Nick