Add: SoundManager

The sound manager is responsible
for playing short-lived sounds on the scene.

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Assets/Scenes/SampleScene.unity

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Assets/Scripts/Sound.meta

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Assets/Scripts/Sound/SoundManager.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+/// <summary>
+/// The sound manager is responsible for handling short lived sounds.
+/// Those are sounds that should not loop.
+/// If you want to manage a looped sound, use the MusicManager or place
+/// it in the scene "as-is" instead.
+/// </summary>
+public class SoundManager : MonoBehaviour
+{
+    [SerializeField] private int initialPoolSize = 10;
+    [SerializeField] private GameObject audioSourcePrefab;
+    
+    private List<AudioSource> audioPool;
+    private Queue<AudioSource> availableAudios;
+
+    // Singleton pattern
+    [System.NonSerialized]  // Do not show it in editor and do not save its value
+    public static SoundManager Instance = null;
+    
+    private void Awake()
+    {
+        // Singleton pattern
+        if (Instance != null && Instance != this)
+        {
+            Destroy(gameObject);
+            return;
+        }
+
+        Instance = this;
+        DontDestroyOnLoad(gameObject);
+    }
+
+    private void Start()
+    {
+        if (audioSourcePrefab == null)
+        {
+            Debug.LogWarning("Cannot create a pool of audio sources: audio source prefab not set");
+        }
+
+        audioPool = new List<AudioSource>(initialPoolSize);
+        availableAudios = new Queue<AudioSource>(initialPoolSize);
+        
+        // For each initially pooled audio
+        for (int i=0; i<initialPoolSize; i++)
+        {
+            // Create a new pooled audio and mark it as available
+            availableAudios.Enqueue(ExtendPool());
+        }
+    }
+
+    private AudioSource ExtendPool()
+    {
+        AudioSource source = Instantiate(
+            audioSourcePrefab,
+            transform
+        ).GetComponent<AudioSource>();
+        audioPool.Add(source);
+        return source;
+    }
+
+    private IEnumerator DelayedBackToPoolCoroutine(AudioSource source)
+    {
+        yield return new WaitForSeconds(source.clip.length);
+        availableAudios.Enqueue(source);
+    }
+
+    public void PlaySoundAt(Vector3 position, AudioClip sound)
+    {
+        // Take audio from pool if possible, extend pool otherwise
+        AudioSource source = Instance.availableAudios.Count == 0 ?
+                             Instance.ExtendPool() :
+                             Instance.availableAudios.Dequeue();
+
+        source.transform.position = position;
+        source.clip = sound;
+        source.loop = false;
+        source.Play();
+        StartCoroutine(Instance.DelayedBackToPoolCoroutine(source));
+    }
+}

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