Update

Assets/Invector-3rdPersonController/Basic Locomotion/Scripts/Generic/Utils/PlaySoundLoop.cs

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+using Invector;
+using System.Collections;
+using UnityEngine;
+
+[RequireComponent(typeof(AudioSource))]
+public class PlaySoundLoop : MonoBehaviour
+{
+    public AudioClip[] clips;
+    public bool playOnAwake;
+    public AnimationCurve volumeCurve;
+    public AnimationCurve pitchCurve;
+    public AnimationCurve frequencyCurve;
+    protected AudioSource source;
+    [vReadOnly]
+    public float currentCurveTime;
+    bool isPlaying;
+
+    public void ChangeCurveTime(float curveTime)
+    {
+        currentCurveTime = curveTime;
+    }
+
+    private void Awake()
+    {
+        source = GetComponent<AudioSource>();
+        if (source != null && playOnAwake) { Play(); }
+    }
+
+    public void Play()
+    {
+        isPlaying = true;
+        StopAllCoroutines();
+        if (gameObject.activeInHierarchy)
+        {
+            currentCurveTime = 0;
+            StartCoroutine(PlayRoutine());
+        }
+    }
+
+    public void Stop()
+    {
+        isPlaying = false;
+    }
+
+    IEnumerator PlayRoutine()
+    {
+        float time = 0;
+        while (isPlaying)
+        {
+            float _frequency = frequencyCurve.Evaluate(currentCurveTime);
+            if (time < _frequency)
+            {
+                time += Time.deltaTime;
+            }
+            else
+            {
+                time = 0;
+                PlayOnShot();
+            }
+            yield return null;
+        }
+    }
+
+    protected virtual void PlayOnShot()
+    {
+        if (source)
+        {
+            float _frequency = frequencyCurve.Evaluate(currentCurveTime);
+            float _volume = volumeCurve.Evaluate(currentCurveTime);
+            float _pitch = pitchCurve.Evaluate(currentCurveTime);
+
+            AudioClip clip = clips[Random.Range(0, clips.Length)];
+            if (clip != null)
+            {
+                source.volume = _volume;
+                source.pitch = _pitch;
+                source.PlayOneShot(clip);
+            }
+        }
+    }
+
+}