You might try a full install of QuickTime, or a reinstall if that does not work.
Open the QuickTime Updater and click "Custom" when it tells you all of your software is up-to-date. Make sure all of the components are checked and click install. Alternatively, you can download the
full installer, and perform a custom full install over your existing partial install (you may need the full installer anyway, see below).
If that does not work, download the
full installer and first run a custom removal and remove all of the QuickTime components (you will then be prompted to restart, you can restart w/o extensions to save a bit of time). Then run the installer again and perform a custom full install.
I have never installed anything but a full blown QuickTime, so I have not run into this issue with ".wav" files. They should just open up and play in the QuickTime player.
It should also be noted that the ".wav" file is not a file format, but a container file (like a QuickTime file). It can contain all sorts of audio data (i.e. aiff, etc). You may simply have a ".wav" file using a codec that QuickTime does not understand (although you should get a message to that effect, and not a bad file message). You can check the file's codec in the info panel when the file is opened in the QuickTime player application.
[I suppose I should have included the link to the full installer.]
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I'm cookoo for Cocoa Apps!
[This message has been edited by jcarr (edited 11-06-2000).]