How to do it...

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

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 or Scene panels.
3. Repeat the previous step to create another GameObject, containing an AudioSource linked to the Pacman Dies clip.
4. For both AudioSources created, uncheck the Play Awake property – so these sounds do not begin playing as soon as the scene is loaded.
5. Create a UI Button named Button-music on the screen, changing its text to Play Music Immediately.
6. Create a UI Button named Button-dies on the screen, changing its text to Play Dies Sound After 1 second.

7. Create an empty GameObject named SoundManager.
8. Create a C# script class, DelayedSoundManager, in a new folder, _Scripts, containing the following code, and add an instance as a scripted component to the SoundManager GameObject:

using UnityEngine; 
 
public class DelayedSoundManager : MonoBehaviour { 
    public AudioSource audioSourcePacmandMusic; 
    public AudioSource audioSourceDies; 
 
    public void ACTION_PlayMusicNow() { 
        audioSourcePacmandMusic.Play(); 
    } 
 
    public void ACTION_PlayDiesSoundAfterDelay() { 
        float delay = 1.0F; 
        audioSourceDies.PlayDelayed(delay); 
    } 
} 

9. With the Button-music GameObject selected in the Hierarchy panel, create a new on-click event-handler, dragging the SoundsManager GameObject into the Object slot, and selecting the ACTION_PlayMusicNow() method.
10. With the Button-dies GameObject selected in the Hierarchy panel, create a new on-click event-handler, dragging the SoundsManager GameObject into the Object slot, and selecting the ACTION_PlayDiesSoundAfterDelay() method.