Contribute cover: Yamaha Portatone PSR-6300 Demonstration

 _    _      ___                 ___    
| || | ||   / _ \\    ____      / _ \\  
| || | ||  / //\ \\  |    \\   | / \ || 
| \\_/ || |  ___  || | [] ||   | \_/ || 
 \____//  |_||  |_|| |  __//    \___//  
  `---`   `-`   `-`  |_|`-`     `---`   
                     `-`