發送短信 : Detector for tonals with harmonics

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