Then you have to transfer the audio file to a server.
What is a .wav file?
Well, in the end it is an array of bytes, also called a Binary Large Object (BLOB).
How to store a BLOB in MySQL?
Well, read the documentation
11.4.3 The BLOB and TEXT Types[
^]
And for future reference, don't change your question by removing vital information.
Just add more information that can be useful.