When we want to transfer a message to a large audience in an attractive way, we record our voice and circulate it on the internet, social media, radio and television. In this way, your message can easily reach the desired audience. When you listen to the radio, you can listen to a beautiful voice. Whenever a call is not connected to the person we are calling; a recorded voice will be generated to tell us whether the call is reachable or the phone is switched off. At that time with think that who is speaking behind the phone and how this message is generated.