public Builder setAudioConfig(
        com.google.cloud.texttospeech.v1beta1.AudioConfig.Builder builderForValue) {
      if (audioConfigBuilder_ == null) {
        audioConfig_ = builderForValue.build();
      } else {
        audioConfigBuilder_.setMessage(builderForValue.build());
      }
      bitField0_ |= 0x00000004;
      onChanged();
      return this;
    }
<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