Paste code

using System.IO;
using UnityEngine;
using UnityEditor;
using UnityEditor.Callbacks;

public class fmod_dll_fix
{

    //Callback to the build path.
    [PostProcessBuildAttribute(999)]
    public static void OnPostprocessBuild(BuildTarget target, string pathToBuiltProject)
    {
        var fixedPath = pathToBuiltProject.Replace(".exe", "_Data/Plugins");
        var newDllPath = Path.Combine(fixedPath, "x86_64");

        string[] dllsToMove = new string[]
        {
            "fmodstudio.dll",
            "fmodstudiol.dll",
            "resonanceaudio.dll"
        };

        foreach (var dll in dllsToMove)
        {
            var oldPath = Path.Combine(fixedPath, dll);
            var newPath = Path.Combine(newDllPath, dll);
            File.Move(oldPath, newPath);

            Debug.Log(string.Format("Moved {0} from old path: {1} to new path: {2}", dll, oldPath, newPath));
        }
    }
}