Take 2: Audio silent in Play Mode.

This is a recurrence of the same issue. With a new Unity project created with a unityPackage of assets from the one that originally had this problem.

I can play music and SFX just fine within the editor. But nothing plays in Play mode or Windows build.

I checked everything. AudioSource active? Check. Listener enabled? Check. Mute on playback? Not enabled. Script that handles playback active? Check. I even looked at the Profiler!

I just can't get any sound from my game. I'm stumped.

The kicker is, I have the same scripts I use for playback in another project. And it works in that one. Everything else works. Just not audio. It worked in this one too and then suddenly stopped.

Specs: Unity 5.4.0p3 64-bit Windows 8.1 Custom audio system script for enabling music loops

 using UnityEngine;
 using System.Collections;
 
 public sealed class System_InfiniteBackgroundMusic {
     public float MusicLoopPoint;
     public AudioClip audioClip;
     
     public float Time {
         get {
             long p = position;
 
             p /= entire.Length;
 
             return p * audioClip.length;
         }
         set {
             double m = value / audioClip.length;
 
             position = (long)(m * entire.Length);
         }
     }
     public float Duration {
         get {
             return audioClip.length;
         }
     }
     public long SampleTime {
         get {
             return position;
         }
         set {
             if (value >= entire.Length) {
                 Debug.LogError("Value is larger than audioClip.samples");
                 return;
             }
             if (value < 0) {
                 Debug.LogError("Value is lesser than 0");
                 return;
             }
             position = value;
         }
     }
     public int SampleDuration {
         get {
             return entire.Length;
         }
     }
 
     float[] entire;
     long position;
     int sampleLoopPoint;
     string audioName;
     int channels;
 
     int start;
     AudioSource audioSource;
 
     public void Play(AudioSource source) {
         double mul = MusicLoopPoint / audioClip.length;
         sampleLoopPoint = (int)(mul * audioClip.samples);
 
         channels = audioClip.channels;
         audioName = audioClip.name;
         entire = new float[audioClip.samples * channels];
 
         audioClip.GetData(entire, 0);
 
         audioClip = AudioClip.Create(audioName + "_Loop", audioClip.samples, channels, audioClip.frequency, true, OnAudioRead, OnAudioSetPos);
 
         audioSource = source;
 
         audioSource.loop = true;
         audioSource.clip = audioClip;
         start = 0;
         position = 0;
         audioSource.Play();
     }
     public void Stop() {
         audioSource.Stop();
         position = 0;
     }
     public void Replay() {
         audioSource.Stop();
         start = 0;
         position = 0;
         audioSource.Play();
     }
     public void ChangeTrack(AudioSource audioSource, AudioClip newTrack, float loop) {
         if (audioClip != null) {
             Stop();
             Object.Destroy(audioClip);
         }
         audioClip = newTrack;
         MusicLoopPoint = loop;
         Play(audioSource);
     }
 
     public void FadeOut()
     {
         // Fade out the track. Use in FixedUpdate() or Update().
         float r = 1.0f;
         while (r != 0){
             audioSource.volume -= 0.05f;
             r -= 0.05f;
         }
         // When volume is 0 (muted), stop track.
         if (audioSource.volume == 0)
         {
             Stop();
         }
     }
     public bool GetPlayStatus() 
     {
         // Get playback status,
         return audioSource.isPlaying;
     }
     public string GetTrackName()
     {
         if (GetPlayStatus())
         {
             // Use this to determine if a certain track is playing.
             return audioClip.name;
         }
         else
         {
             return "NONE";
         }
     }
 
     void OnAudioRead(float[] data) {
         if (start <= 16) {
             start++;
             position = 0;
             for (int i = 0; i < data.Length; i++)
                 data[i] = 0;
             return;
         }
         int count = 0;
         while (count < data.Length) {
             data[count] = entire[position];
 
             position++;
             count++;
 
             if (position >= entire.Length) {
                 position = sampleLoopPoint * channels;
             }
         }
     }
     void OnAudioSetPos(int newPos) {
 
     }
 }

I would really appreciate advice. Is ths a bug with Unity itself?