Serial Out From Audio In Information

For your requirement, Arduino does not do all by its own. You need to purchase an audio assistance hardware like one in the following link
http://tenettech.com/product.php?id_product=1644

Hope it helps!

Regards,
Bala
Arduino-Division,
Tenet Technetronics.
bala@tenettech.com
ph: 080 42103124