Using UnityEngine.? for change music

hey, im in progress on develop my games, well, at first im sorry if my english is bad or something..

i usually using UnityEngine.Material, input my materials to list, and add them to my option.. well now i wondering, can i use this method for make a list, contains audio files in it ? or which class should i use ? UnityEngine.AudioClip or what ?

im sorry if you confused about my question or my english.. :s