Contribute correction: Speech Synthesis

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