public static com.google.cloud.video.livestream.v1.AudioStream.AudioMapping parseDelimitedFrom(
        java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws java.io.IOException {
      return com.google.protobuf.GeneratedMessageV3.parseDelimitedWithIOException(
          PARSER, input, extensionRegistry);
    }
<pre>
Audio volume control in dB. Negative values decrease volume,
positive values increase. The default is 0.
</pre>

<code>double gain_db = 5;</code>

@return The gainDb.
java-video-live-stream/proto-google-cloud-live-stream-v1/src/main/java/com/google/cloud/video/livestream/v1/AudioStream.java