@java.lang.Override
  public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
    if (!audioContent_.isEmpty()) {
      output.writeBytes(1, audioContent_);
    }
    for (int i = 0; i < timepoints_.size(); i++) {
      output.writeMessage(2, timepoints_.get(i));
    }
    if (((bitField0_ & 0x00000001) != 0)) {
      output.writeMessage(4, getAudioConfig());
    }
    getUnknownFields().writeTo(output);
  }
<pre>
The audio metadata of `audio_content`.
</pre>

<code>.google.cloud.texttospeech.v1beta1.AudioConfig audio_config = 4;</code>
java-texttospeech/proto-google-cloud-texttospeech-v1beta1/src/main/java/com/google/cloud/texttospeech/v1beta1/SynthesizeSpeechResponse.java