How to use the expo-av.Audio.RECORDING_OPTION_ANDROID_OUTPUT_FORMAT_MPEG_4 function in expo-av

async _findSong() {
    // Audio.setAudioModeAsync()
    const {status} = await Audio.requestPermissionsAsync();
    console.log('Current Status ' + status);
    const recording = new Audio.Recording();
    try {
      await Audio.setAudioModeAsync({
        playsInSilentModeIOS: true,
        allowsRecordingIOS: true,
      });
      const recordOptions = {
        android: {
          extension: '.m4a',
          outputFormat: Audio.RECORDING_OPTION_ANDROID_OUTPUT_FORMAT_MPEG_4,
          audioEncoder: Audio.RECORDING_OPTION_ANDROID_AUDIO_ENCODER_AAC,
          sampleRate: 44100,
          numberOfChannels: 2,
          bitRate: 128000,
        },
        ios: {
          extension: '.wav',
          audioQuality: Audio.RECORDING_OPTION_IOS_AUDIO_QUALITY_HIGH,
          sampleRate: 8000,
          numberOfChannels: 1,
          linearPCMBitDepth: 16,
          linearPCMIsBigEndian: false,
          linearPCMIsFloat: true,
        },
      };
      await recording.prepareToRecordAsync(recordOptions);

class RecorderManager {
  private static instance: RecorderManager
  private static recordInstance: Audio.Recording
  private onStartCallback
  private onStopCallback
  private onPauseCallback
  private onResumeCallback
  private onErrorCallback
  private preStatus

  private constructor () { }

  private static RecordingOptions = {
    android: {
      extension: '.m4a',
      outputFormat: Audio.RECORDING_OPTION_ANDROID_OUTPUT_FORMAT_MPEG_4,
      audioEncoder: Audio.RECORDING_OPTION_ANDROID_AUDIO_ENCODER_AAC,
      sampleRate: 8000,
      numberOfChannels: 2,
      bitRate: 48000
    },
    ios: {
      extension: '.caf',
      audioQuality: Audio.RECORDING_OPTION_IOS_AUDIO_QUALITY_MAX,
      sampleRate: 8000,
      numberOfChannels: 2,
      bitRate: 48000,
      linearPCMBitDepth: 16,
      linearPCMIsBigEndian: false,
      linearPCMIsFloat: false
    }
  }