Importing audio into Unity follows the same processes as importing any other type of asset. We will cover the basics of what you need to know in the following sections.
Importing audio
Audio Listener
Have you heard the saying, If a tree falls in a forest and no one is there to hear it, does it still make a sound? Well, in Unity, if there is nothing to hear your audio, then the answer is no. This is because Unity has a component called an Audio Listener, which works like a microphone. To locate the Audio Listener, click the Main Camera, and then look over at the Inspector; it should be located near the bottom, like in the following image:
If for some reason, it isn't there, you can always add it by clicking the following...