I've been using this singleton for a couple of XR projects based in Unity, figured I should keep updating it here. I referenced a few existing audio manager scripts out there, particularly this logic from CodeMonkey.

1. Setup:

   • Create an empty AudioManager GameObject and attach the script to it.
   • Define sound clips in the SoundClips enum list.
   • Create an Audio Mixer according to your sounds and the way you like to setup your mix.
   • In the inspector, populate the audioClipArray with AudioClipToPlay instances, associating each sound clip with its corresponding audio clip and audio mixer group.

2. Play Sounds:

   • Call PlaySound3D or PlaySound2D in a script attached to a GameObject to play 3D or 2D sounds, respectively.
   • Provide the appropriate parameters such as sound clip type, pitch, volume, spatial blend, spread, and loop flag.

3. Stop Sounds:

   • Call StopSound to stop a currently playing sound based on the specified sound clip.

4. Fade In/Out:

   • Use the FadeInSound and FadeOutSound methods for implementing sound fading.

// Play a 3D sound at the object's position with default settings
// Note - "ButtonClick" will be a sound from the SoundClips enum
AudioManager.PlaySound3D(AudioManager.SoundClips.ButtonClick, playerTransform, 1f, 1f, 0f, false, true, 1f);

// Play a 2D looping sound with custom pitch and volume
AudioManager.PlaySound2D(AudioManager.SoundClips.RoomAmbience, 0.8f, 0.5f, true, false, 0f);

// Stop the RoomAmbience sound
AudioManager.StopSound(AudioManager.SoundClips.RoomAmbience);

// Fade Out sound
StartCoroutine(FadeOutSound(AudioManager.SoundClips.RoomAmbience, 3f));

I know this can be optimized even further, probably by using object pooling instead of creating a new GameObject for each sound, if you have a lot of sounds playing frequently. I'll try adding this in the future either as a separate script or integrated into the Audio Manager.