public com.google.cloud.texttospeech.v1.StreamingAudioConfigOrBuilder
        getStreamingAudioConfigOrBuilder() {
      if (streamingAudioConfigBuilder_ != null) {
        return streamingAudioConfigBuilder_.getMessageOrBuilder();
      } else {
        return streamingAudioConfig_ == null
            ? com.google.cloud.texttospeech.v1.StreamingAudioConfig.getDefaultInstance()
            : streamingAudioConfig_;
      }
    }
<pre>
Optional. The configuration of the synthesized audio.
</pre>

<code>
.google.cloud.texttospeech.v1.StreamingAudioConfig streaming_audio_config = 4 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-texttospeech/proto-google-cloud-texttospeech-v1/src/main/java/com/google/cloud/texttospeech/v1/StreamingSynthesizeConfig.java