Contribute cover: Yamaha Portatone PSR-6300 Demonstration

 __   __     ___     _____       ___    
 \ \\/ //   / _ \\  |  __ \\    / _ \\  
  \   //   | / \ || | |  \ ||  | / \ || 
  / . \\   | \_/ || | |__/ ||  | \_/ || 
 /_//\_\\   \___//  |_____//    \___//  
 `-`  --`   `---`    -----`     `---`