wxt-8.x-3.011/modules/custom/wxt_ext/wxt_ext_media_audio/wxt_ext_media_audio.module

<?php

/**
 * @file
 * Adds support for locally-hosted audio files as media items.
 */

use Drupal\wxt_core\OverrideHelper as Override;
use Drupal\wxt_ext_media_audio\Plugin\media\Source\AudioFile;

/**
 * Implements hook_media_source_info_alter().
 */
function wxt_ext_media_audio_media_source_info_alter(array &$sources) {
  Override::pluginClass($sources['audio_file'], AudioFile::class);
}