How to download 20150612mix.mp3:
PC: Right-click the picture. Select “Save target as” or “Save link as.” Choose the location on your computer where you would like to save the file. Select “Save.”
Mac: Press the Control (ctrl) key and click on the picture. When the option menu appears, choose “Download link to disk” or “Download linked file.”
Choose the location on your computer where you would like to store the file. Your computer will start the download once you have selected a location.

Enjoy.