Harry,
Just a few more thoughts, for what they're worth.
I've forgotten some of the challenge with the wave file. Can you insert
it into Studio Recorder and play it? If you can, then when you convert
it, you'll have to use a very low bit rate and sample size. If you try
conversion at a higher setting, there won't be much material for Studio
recorder to work with, and it won't be able to convert it. Also, when
you convert, you should use mono, not stereo, because it's a mono file
to start with. It won't sound too good at a low bit and sample rate, but
it's all you've got.
If you plan to insert it into something else, you may have to convert
the entire file you're putting it into, to that same low bit and sample
rate, because that one file has such a low setting that it will sound
terrible if you use a higher setting, even though the rest of that
larger file is set to a higher rate and size.
Mary