Format Factory is a free software / freeware that can be used to convert various video and audio formats, more can be found here multimedia software factory format. In this post aka discussed about how to change / convert mp3 files into wav format audio files. This file will be used as a background song video clip. More can be seen here making pictures into video. To change mp3 to wav do the procedure below:
1. Open the application format factory
On the slide the Audio menu select All to wav
2.Select the mp3 file to be converted
In this example I use Fernando song sung by the legendary band ABBA's two pairs of husband and wife
3. Click the Start button to start converting mp3 to wav
Now the wav file can be used for making video in windows movie maker.