I have been implementing some sound effects. Our playable characters, the settlers, contain a bunch of different sound effects and I had to invent a system for handling them. The things I had in mind:

• Allow to later add more sound effects fairly easily in the editor
• Adding several AudioClips for each sound
• A simple way to get a random variation of a sound without dealing with the randomization where the sound is played from
• The AudioSource components should be children of the settler object that plays them, to make use of Unity’s built-in system for 3D space audio
• Not spending too much time on any of this shit, since we have a tight schedule

I made a wrapper class for the AudioSource to include several AudioClips and the ability to set a random one through a function. The main script has a list of instances of this class and this list can be changed in the editor. The whole system is meant to be expanded; as can be seen in the Enum, there is currently only four different sounds. And the NextSound function is not in use yet. I prepared it because I figured you may sometimes want to go through the variations of a sound in order rather than using a random one every time. The code can be seen below:

using UnityEngine;
using System.Collections;
using System.Collections.Generic;

public enum SettlerSounds
{
    SHOT,
    PICKUP_STONE,
    PICKUP_WOOD,
    MELEE_HIT,
}

[System.Serializable]
public class SettlerAudioSource
{
    public SettlerSounds soundIdentifier;
    private AudioSource audioSource;
    public List<AudioClip> audioClips;
    private int currentIndex = 0;

    public void Initialize(AudioSource _audioSource)
    {
        audioSource = _audioSource;
        audioSource.playOnAwake = false;
        audioSource.clip = audioClips[0];
        audioSource.spatialBlend = 0.8f;
    }

    public AudioSource RandomSound()
    {
        int random = Random.Range(0, (audioClips.Count - 1));
        currentIndex = random;
        audioSource.clip = audioClips[currentIndex];
        return audioSource;
    }

    public AudioSource NextSound()
    {
        audioSource.clip = audioClips[currentIndex];
        currentIndex++;
        if (currentIndex >= audioClips.Count)
            currentIndex = 0;
        return audioSource;
    }

    public AudioSource CurrentSound()
    {
        return audioSource;
    }
}

public class SettlerAudioContainer : MonoBehaviour
{
    public List<SettlerAudioSource> audioSources;

    void Awake()
    {
        for (int i = 0; i < audioSources.Count; i++)
        {
            AudioSource audioSource = gameObject.AddComponent<AudioSource>();
            audioSources[i].Initialize(audioSource);
            audioSource.transform.SetParent(transform);
        }
    }

    public AudioSource GetAudioSource(SettlerSounds identifier)
    {
        for (int i = 0; i < audioSources.Count; i++)
        {
            SettlerAudioSource source = audioSources[i];
            if (source.soundIdentifier == identifier)
                return source.RandomSound();
        }

        return null;
    }
}