Is it possible to write an app to play a sound for the caller at the receiving end?

[DynoPlast]

My idea centers around being able to play certain background noises for the person at the other end, to make it seem like you are in a given environment such as a club, ball game, swimming pool, someone calling out your name .... "gotta go now", etc....

I just want to know if the hardware capability is there.

 

[bthomp21]

so you dont have to talk to them? just dont answer. lol