I found this on the internet but didn't see the way to accomplish it:

Your Adobe Bridge preferences determine whether Bridge writes the XMP metadata directly into the document it describes or creates a companion document known as a sidecar file to contain the metadata. If you prefer to separate file data from metadata to avoid increasing the sizes of your files or to preserve your documents intact for other reasons, including the demands of a forensic work flow, sidecar files offer an ideal solution. Their disadvantage lies in their ability to become separated from the files they describe.

Read more: Adobe Bridge XMP Storage Methods | eHow.com http://www.ehow.com/info_12172538_adobe-bridge-xmp-storage-methods.htm l#ixzz23IWfqT3x

Curt, I appreciate the time you are spending to help me!

1. Do you mean that there are preferences in Camera Raw that can separate file data from metadata to avoid increasing the sizes of your files?

2. Doesn't Bridge do that too? If so, which preference option is it? I couldn't find one.

Like you said, it may not work for an mp4 file (although the keywords would actually be added to the original .wav file and then it would beconverted to an mp4).

3. I wonder if anyone knows if Camera Raw can be used to add keywords to .wav files?

Thank you very much,

Kim

Thank you Paul for your thoughts - I dread having to use Excel for this project, but unless someone lets me know a better way--it may be the only way.

In response to your jpg info: All of my jpg's, psd's, wav's and tif's are not  read-only and I have the option to change those properties if I wish. Also, I read recently somewhere that sidecar files can only be embedded in a jpg in order for Bridge to see the sidecar files. And as you said, to separate the keyword sidecar files, the original files must be raw (not a jpg or m4a).

I hope someone can let us know if there is another Adobe program (or any program) that can perform this to a .wav file. --- Kim