APR33A3 speech synthesizer and arduino

How can i control an apr33a3 speech synthesizer using arduino?? I want a playback of desired message(one from the many recorded earlier in the ic) based on the input from arduino...How to do this interfacing?? Plz help..Thanks in advance

it is in the datasheet:

replace the switched with a connection to a digital pin of the arduino or maybe better a 595 register. (less pins)

So, if i set the digital pin in arduino to high, the corresponding message will be played right?? In the datasheet, saw something like change the pin from vIH to vIL. I'm poor in electronics.. So,please clarify.