Using the browser - Hello-Meow/AudioImporter GitHub Wiki

The package also includes a simple file browser, in the form of a prefab with an attached Browser Component. The browser uses Unity's UI system, so the prefab has to be parented to a Canvas.

Use the Browser Component's FileSelected event to handle selected files.

using UnityEngine;

public class ImporterExample : MonoBehaviour 
{
    public Browser browser;
    public AudioImporter importer;
    public AudioSource audioSource;

    void Awake()
    {
        browser.FileSelected += OnFileSelected;
        importer.Loaded += OnLoaded;
    }

    private void OnFileSelected(string path)
    {
        importer.Import(path);
    }

    private void OnLoaded(AudioClip clip)
    {
        audioSource.clip = clip;
        audioSource.Play();
    }
}