Play an AudioClip asset in Unity by double clicking on it without external applications being opened

AudioPreviewer.cs

using System;
using System.Reflection;
using UnityEditor;
using UnityEditor.Callbacks;
using UnityEngine;

// Source and Credit: FREE Audio Preview Tool For Unity Tutorial (by Warped Imagination) 2022-12-05
// https://www.youtube.com/watch?v=Gd8M1Ychis8
public static class AudioPreviewer
{
    // Reference for AudioUtil method information: 
    // https://github.com/Unity-Technologies/UnityCsReference/blob/master/Editor/Mono/Audio/Bindings/AudioUtil.bindings.cs
#if UNITY_2020_2_OR_NEWER
    private static readonly string methodNamePlayClip = "PlayPreviewClip";
    private static readonly string methodNameIsClipPlaying = "IsPreviewClipPlaying";
    private static readonly string methodNameStopAllClips = "StopAllPreviewClips";
#else
    private static readonly string methodNamePlayClip = "PlayClip";
    private static readonly string methodNameIsClipPlaying = "IsClipPlaying";
    private static readonly string methodNameStopAllClips = "StopAllClips";
#endif

    private static AudioClip lastActiveClip;

    [OnOpenAsset]
    public static bool OnOpenAsset(int instanceId, int line)
    {
        UnityEngine.Object obj = EditorUtility.InstanceIDToObject(instanceId);
        if (obj is AudioClip audioClip)
        {
            Debug.Log($"Open Audio Preview for \"{obj.name}\"");
            PlayOrStopPreviewClip(audioClip);
            return true; // Prevent Unity from further processing the opening task
        }
        return false; // Continue builtin handling 
    }

    // If a clip is clicked again that is already playing, stop it. Otherwise play the new selected clip
    // and stop previous clips from playing
    private static void PlayOrStopPreviewClip(AudioClip audioClip)
    {
        Assembly unityAssembly = typeof(AudioImporter).Assembly;
        Type audioUtil = unityAssembly.GetType("UnityEditor.AudioUtil");
#if UNITY_2020_2_OR_NEWER
        MethodInfo isPreviewClipPlayingInfo = audioUtil.GetMethod(
            methodNameIsClipPlaying,
            BindingFlags.Static | BindingFlags.Public);
        bool isCurrentClipPlaying = (bool)isPreviewClipPlayingInfo.Invoke(null, null) && audioClip == lastActiveClip;
#else
        MethodInfo isPreviewClipPlayingInfo = audioUtil.GetMethod(
            methodNameIsClipPlaying, 
            BindingFlags.Static | BindingFlags.Public, 
            null,
            new System.Type[] { typeof(AudioClip) }, 
            null);
        bool isCurrentClipPlaying = (bool)isPreviewClipPlayingInfo.Invoke(null, new object[] { audioClip });
        // I don't know why following line is necessary but without it, regardless of which audio file is
        // double clicked the playback will always just stop instead of playing the new file
        isCurrentClipPlaying &= audioClip == lastActiveClip;
#endif
        MethodInfo stopAllPreviewClipsInfo = audioUtil.GetMethod(
            methodNameStopAllClips, BindingFlags.Static | BindingFlags.Public);
        stopAllPreviewClipsInfo.Invoke(null, null);
        if (!isCurrentClipPlaying)
        {
            PlayPreviewClip(audioUtil, audioClip);
        }
    }

    private static void PlayPreviewClip(Type audioUtil, AudioClip audioClip)
    {
        MethodInfo playPreviewClipInfo = audioUtil.GetMethod(
            methodNamePlayClip,
            BindingFlags.Static | BindingFlags.Public,
            null, 
            new System.Type[] { typeof(AudioClip), typeof(Int32), typeof(Boolean) },
            null);
        playPreviewClipInfo.Invoke(null, new object[] { audioClip, 0, false });
        lastActiveClip = audioClip;
    }
}