How to do it...

To create a music-loop manager, perform the following steps:

1. Create a new Unity 3D project and import the provided sound clip files.
2. Create four GameObjects in the scene that contain an AudioSource component linked to a different AudioClip loop from the 140 bpm files provided. You can do this in a single step by dragging the music clip from the Project panel into either the Hierarchy panel or the Scene panel.

3. In the Inspector panel, uncheck the Play On Awake parameter for all four AudioSource components (so that they don't start playing until we tell them to).
4. Add a new empty GameObject named musicScheduler to the scene.
5. Create a C# script class, called LoopScheduler, in a new folder, _Scripts, that contains the following code. Also, add an instance as a scripted component to the musicScheduler GameObject:

using UnityEngine; 
 
public class LoopScheduler : MonoBehaviour { 
    public float bpm = 140.0F; 
    public int numBeatsPerSegment...