public Builder clearAudioConfig() {
      bitField0_ = (bitField0_ & ~0x00000004);
      audioConfig_ = null;
      if (audioConfigBuilder_ != null) {
        audioConfigBuilder_.dispose();
        audioConfigBuilder_ = null;
      }
      onChanged();
      return this;
    }
<pre>
Required. The configuration of the synthesized audio.
</pre>

<code>
.google.cloud.texttospeech.v1.AudioConfig audio_config = 3 [(.google.api.field_behavior) = REQUIRED];
</code>
java-texttospeech/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/SynthesizeSpeechRequest.java