I'm not familiar with WAV files. Why don't you deliver the audio in MP3?
We feel it is important to deliver the highest quality audio to our customers and let the client decide on how much audio quality should be removed when converting to MP3. There are many settings and variables to convert to using MP3 and it is not possible in deliver in every format available.
It is also important to note that many of our collections include music loops. When music loops are converted to MP3 the loop points are altered and the file becomes unusable as a loop.