public com.google.cloud.video.livestream.v1.PreprocessingConfig.Audio.Builder
        getAudioBuilder() {
      bitField0_ |= 0x00000001;
      onChanged();
      return getAudioFieldBuilder().getBuilder();
    }
<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