TouhouLS/Assets/Code/AudioHelper.cs

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

public static class AudioHelper {
  static Dictionary<int, AudioClip> ClipByID;
  static Dictionary<AudioClip, int> IDByClip;

  public enum AudioCategory : byte {
    Music = 1,
    Fx = 2,
    Voice = 3
  }

  public static float VolumeLevel(AudioCategory category) {
    return PlayerPrefs.GetFloat(category.ToString(), 0.375f); // Did you know default volume of 1 is a bad idea
  }

  public static void SetVolume(AudioCategory category, float level) {
    PlayerPrefs.SetFloat(category.ToString(), level);
    PlayerPrefs.Save();
  }

  public static int ByClip(AudioClip clip) {
    if (IDByClip == null) Init();
    if (IDByClip.TryGetValue(clip, out int idIfPresent)) {
      return idIfPresent;
    }
    Debug.LogWarningFormat("{0} is not resources loaded clip!!", clip.name);
    return 0;
  }

  public static AudioClip ByID(int id) {
    if (ClipByID == null) Init();
    try {
      return ClipByID[id];
    } catch {
      throw new System.Exception(string.Format("Failure to find SFX with ID {0}", id));
    }
    
  }

  // Build the audio lookup
  static void Init() {
    ClipByID = new Dictionary<int, AudioClip>();
    IDByClip = new Dictionary<AudioClip,int>();

    var allAudio = Resources.LoadAll<AudioClip>("");

    for (int i = 0; i < allAudio.Length; ++i) {
      var clip = allAudio[i];
      ClipByID.Add(i, clip);
      IDByClip.Add(clip, i);
    }

    var oString = "Loaded Sounds: ";
    foreach (var key in ClipByID) {
      oString += key;
    }

    Debug.Log(oString);
  }
}