AudioController.cs

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

public class AudioController : MonoBehaviour
{
  // This is an audio controller script that makes it easier to control multiple audio sources with
  // animations. This can only control one audio source per frame.
  // This is meant to be used in animation clips.

  // First set the size of the Audio Clips array in the inspector to the number of audio clips you
  // intend to use and add audio clips to the array. Audio sources will be automatically created
  // based on this. In your animation clip, set a keyframe for the Active Audio to the element
  // number of the audio source you want to control. In the same keyframe, set all of the properties
  // you want to change. You have to do set a keyframe for Active Audio for every change you make,
  // or set the animations curves to constant and only set a keyframe when you want to change the
  // audio source you want to control.

  AudioSource[] audioSources; // Audio sources are created based on the number of audio clips provided.
  public AudioClip[] audioClips; // Audio clips are provided using the inspector.

  public int activeAudio; // The audio source currently being controlled.
  public bool playAudio; // When set to true, plays the clip from the currently Active Audio source.

  // Below are the same properties that would exist in your audio source.
  // You can set the default initial values for all audio sources in the inspector, or change
  // the values of the properties of each audio source at runtime using your animation clip.

  // Main properties visible to the inspector of an Audio Source component.
  [Header("Audio Source Settings")]
  public AudioClip clip;
  AudioClip previousClip;
  public bool mute;
  public bool bypassEffects;
  public bool bypassListenerEffects;
  public bool bypassReverbZones;
  public bool playOnAwake;
  public bool loop;
  [Range(0,256)]
  public int priority;
  [Range(0.0f,1.0f)]
  public float volume;
  [Range(-3.0f,3.0f)]
  public float pitch;
  [Range(-1.0f,1.0f)]
  public float panStereo;
  [Range(0.0f,1.0f)]
  public float spatialBlend;
  [Range(0.0f,1.1f)]
  public float reverbZoneMix;

  // 3D Sound properties visible to the inspector of an Audio Source component.
  [Header("3D Sound Settings")]
  [Range(0.0f,5.0f)]
  public float dopplerLevel;
  [Range(0.0f,360.0f)]
  public float spread;
  public AudioRolloffMode rolloffMode;
  public float minDistance;
  public float maxDistance;

  // Properties not visible in the inspector of an Audio Source component, but are made visible here.
  [Header("Other Sound Settings")]
  public bool ignoreListenerVolume;
  public bool spatialize;
  public bool spatializePostEffects;
  public float time;
  float previousTime;
  public int timeSamples;
  float previousTimeSamples;
  public AudioVelocityUpdateMode velocityUpdateMode;

  // The classes for these properties don't seem to exist when I load this in Unity. I'll implement them when learn how to use them.
  //public AudioMixer outputAudioMixerGroup;
  //public GamepadSpeakerOutputType gamepadSpeakerOutputType;

  // Start is called before the first frame update
  void Start()
  {
    // This creates audio sources based on the number of audio clips.
    audioSources = new AudioSource[audioClips.Length];
    for(int i = 0; i < audioClips.Length; i++){
      audioSources[i] = gameObject.AddComponent<AudioSource>();
      audioSources[i].clip = audioClips[i];
      audioSources[i].enabled = false; // The audio source components gets disabled by default.
    }
  }

  // The actual default values for an Audio Source.
  void Reset()
  {
    playOnAwake = true;
    priority = 128;
    volume = 1.0f;
    pitch = 1.0f;
    reverbZoneMix = 1.0f;
    dopplerLevel = 1.0f;
    minDistance = 1.0f;
    maxDistance = 500f;
  }

  // Update is called once per frame
  void Update()
  {
    // The Audio Source component will be enabled when Play Audio is true to play the audio "on awake".
    // This is done instead of play() or playOneShot() because there is severe random delay
    // in starting the playback of the audio using the latter two methods.
    // My testing shows that turning the component on and off and keeping "Play On Awake" enabled
    // plays the audio correctly 100% of the time.
    // You have the option to disable "Play On Awake", but you may have unwanted results.
    audioSources[activeAudio].enabled = playAudio;

    // Main properties.
    if(clip != previousClip){
      audioClips[activeAudio] = clip;
      previousClip = clip;
      audioSources[activeAudio].clip = clip;
    }
    audioSources[activeAudio].mute = mute;
    audioSources[activeAudio].bypassEffects = bypassEffects;
    audioSources[activeAudio].bypassListenerEffects = bypassListenerEffects;
    audioSources[activeAudio].bypassReverbZones = bypassReverbZones;
    audioSources[activeAudio].playOnAwake = playOnAwake;
    audioSources[activeAudio].loop = loop;
    audioSources[activeAudio].priority = priority;
    audioSources[activeAudio].volume = volume;
    audioSources[activeAudio].pitch = pitch;
    audioSources[activeAudio].panStereo = panStereo;
    audioSources[activeAudio].spatialBlend = spatialBlend;
    audioSources[activeAudio].reverbZoneMix = reverbZoneMix;

    // 3D Sound properties.
    audioSources[activeAudio].dopplerLevel = dopplerLevel;
    audioSources[activeAudio].spread = spread;
    audioSources[activeAudio].rolloffMode = rolloffMode;
    audioSources[activeAudio].minDistance = minDistance;
    audioSources[activeAudio].maxDistance = maxDistance;

    // Properties not in inspector.
    audioSources[activeAudio].ignoreListenerVolume = ignoreListenerVolume;
    audioSources[activeAudio].spatialize = spatialize;
    audioSources[activeAudio].spatializePostEffects = spatializePostEffects;
    if(time != previousTime){
      previousTime = time;
      audioSources[activeAudio].time = time;
    }
    if(timeSamples != previousTimeSamples){
      previousTimeSamples = timeSamples;
      audioSources[activeAudio].timeSamples = timeSamples;
    }
    audioSources[activeAudio].velocityUpdateMode = velocityUpdateMode;

    // I'll add these after I learn how they're used.
    // audioSources[activeAudio].outputAudioMixerGroup;
    // audioSources[activeAudio].gamepadSpeakerOutputType;
  }
}