private com.google.protobuf.SingleFieldBuilderV3<
            com.google.cloud.video.livestream.v1.PreprocessingConfig.Audio,
            com.google.cloud.video.livestream.v1.PreprocessingConfig.Audio.Builder,
            com.google.cloud.video.livestream.v1.PreprocessingConfig.AudioOrBuilder>
        getAudioFieldBuilder() {
      if (audioBuilder_ == null) {
        audioBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.cloud.video.livestream.v1.PreprocessingConfig.Audio,
                com.google.cloud.video.livestream.v1.PreprocessingConfig.Audio.Builder,
                com.google.cloud.video.livestream.v1.PreprocessingConfig.AudioOrBuilder>(
                getAudio(), getParentForChildren(), isClean());
        audio_ = null;
      }
      return audioBuilder_;
    }
<pre>
Audio preprocessing configuration.
</pre>

<code>.google.cloud.video.livestream.v1.PreprocessingConfig.Audio audio = 1;</code>
java-video-live-stream/proto-google-cloud-live-stream-v1/src/main/java/com/google/cloud/video/livestream/v1/PreprocessingConfig.java