public com.google.cloud.texttospeech.v1.AudioConfig getAudioConfig() {
      if (audioConfigBuilder_ == null) {
        return audioConfig_ == null
            ? com.google.cloud.texttospeech.v1.AudioConfig.getDefaultInstance()
            : audioConfig_;
      } else {
        return audioConfigBuilder_.getMessage();
      }
    }
<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 The audioConfig.
java-texttospeech/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/SynthesizeLongAudioRequest.java