public com.google.cloud.video.livestream.v1.AudioStream.Builder getAudioStreamBuilder() {
      return getAudioStreamFieldBuilder().getBuilder();
    }
<pre>
Encoding of an audio stream.
</pre>

<code>.google.cloud.video.livestream.v1.AudioStream audio_stream = 2;</code>
java-video-live-stream/proto-google-cloud-live-stream-v1/src/main/java/com/google/cloud/video/livestream/v1/ElementaryStream.java