public boolean hasAudioConfig() {
      return ((bitField0_ & 0x00000004) != 0);
    }
<pre>
Required. The configuration of the synthesized audio.
</pre>

<code>
.google.cloud.texttospeech.v1.AudioConfig audio_config = 3 [(.google.api.field_behavior) = REQUIRED];
</code>

@return Whether the audioConfig field is set.
java-texttospeech/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/SynthesizeSpeechRequest.java