Contribute correction: Sound Generator

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