使用flutter_sound采集音频流录音一直报错：音频流格式

  await recorder?.startRecorder(toFile:"")

存储到本地文件的没问题，采集音频流的方式录音就一直报错

await recorder?.openRecorder();
var recordingDataController = StreamController<Food>();
      _mRecordingDataSubscription =
          recordingDataController.stream.listen((buffer) {
        if (buffer is FoodData) {
          print('buffer ---- $buffer');
        }
      });

await recorder?.startRecorder(
    toStream: recordingDataController.sink,
    codec: Codec.pcm16,
    audioSource: AudioSource.microphone
);

后来发现需要修改配置，如下,摘自github上作者的demo

final session = await AudioSession.instance;
    await session.configure(const AudioSessionConfiguration(
      avAudioSessionCategory: AVAudioSessionCategory.playAndRecord,
      avAudioSessionCategoryOptions: AVAudioSessionCategoryOptions.defaultToSpeaker,
      avAudioSessionMode: AVAudioSessionMode.spokenAudio,
      avAudioSessionRouteSharingPolicy:
      AVAudioSessionRouteSharingPolicy.defaultPolicy,
      avAudioSessionSetActiveOptions: AVAudioSessionSetActiveOptions.none,
      // androidAudioAttributes: AndroidAudioAttributes(
      //   contentType: AndroidAudioContentType.speech,
      //   flags: AndroidAudioFlags.none,
      //   usage: AndroidAudioUsage.voiceCommunication,
      // ),

    ));

先初始化配置，再开始录音，成功