public Builder setAudio(com.google.cloud.video.livestream.v1.PreprocessingConfig.Audio value) {
      if (audioBuilder_ == null) {
        if (value == null) {
          throw new NullPointerException();
        }
        audio_ = value;
      } else {
        audioBuilder_.setMessage(value);
      }
      bitField0_ |= 0x00000001;
      onChanged();
      return this;
    }
<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