I meant to say that for ex: When we use recorder in our phone, whatever we speak is received by the phone microphone, or when we are in a call the phone microphone receives whatever we speak.
Now what i want is that, I is should be able to send a pre-defined audio to microphone, so that we don't have to speak anything, it must done automatically.
Similar like what Answering machine does, if you don't pick up the call it plays an audio through speaker, which is listened by the microphone.
But in my case it should be done internally, the audio should not come out from phone speaker.
I tried my best to elaborate, if there is something i may have skipped, please feel free to ask.