QAudirecorder does not record proper .wav file

Hey, i did recording from microphone using qt in .wav file.
i am able to play this file in media playe.but when i added this file in matlab for wavread this is giving a error invalid chunk size …..and when i calculated chunk size and subchuk size of .wav file.it is not correct.it is a qt bug. this is my qt code.

audioRecorder->setAudioInput(audioRecorder->audioInput());
audioRecorder->setOutputLocation(QUrl::fromLocalFile("C:/Users/Kaptron3/Desktop/Sound.wav"));

QAudioEncoderSettings audioSettings;
audioSettings.setCodec("audio/x-wav");
audioSettings.setSampleRate(16000);

audioSettings.setBitRate(16);
audioSettings.setQuality(QMultimedia::EncodingQuality(16000));
audioSettings.setEncodingMode(QMultimedia::ConstantQualityEncoding);

audioRecorder>setEncodingSettings(audioSettings,QVideoEncoderSettings(),
"audio/x-wav");

audioRecorder->record();