How to do it...

To schedule a sound to play after a given delay, perform the following steps:

1. Create a new Unity 2D project and import the sound clip files.
2. Create a GameObject in the scene containing an AudioSource component linked to the Pacman Opening Song AudioClip. This can be done in a single step by dragging the music clip from the Project panel into either the Hierarchy panel or the Scene panel.
3. Repeat the previous step to create another GameObject, containing an AudioSource component linked to the Pacman Dies clip.
4. For both AudioSource components created, uncheck the Play Awake property. This is so that the sounds do not begin playing as soon as the scene is loaded.
5. Create a UI Button named Button-music on the screen and change its text to Play Music Immediately.
6. Create a UI Button named Button-dies on the screen and change its text to Play Dies Sound After 1 second.

7. Create an empty GameObject named SoundManager.
8. Create a C# script class, called ...