MP3 and wav files are too large to use for background music. It takes forever for them to load. to solve the problem you need to convert to rm files and make them stream load, means play as they load.
You need to download these two programs use the basic ones they are both free.
RealSystem Producer basic
Use Music match to create and to convert mp3 to wav files
Use Real system Producer to convert the wav files to rm files. It also create rpm file and html code and upload the files to your directory. From there you can copy and paste codes to manage the files.