Tools/materials: computer version of cool dog music software.

1. Click Cool Dog Music.

2. Click on the four squares at the top of the screen.

3. click format conversion.

4. Click Add File.

5. Select an audio in VPR format.

6. Click Open.

7. Finally, check the desired mp3 format and click the converted file at the bottom right of the screen. Through the above operations, the audio in VPR format is converted into mp3 format.