@java.lang.Override
    public int hashCode() {
      if (memoizedHashCode != 0) {
        return memoizedHashCode;
      }
      int hash = 41;
      hash = (19 * hash) + getDescriptor().hashCode();
      hash = (37 * hash) + ATOM_KEY_FIELD_NUMBER;
      hash = (53 * hash) + getAtomKey().hashCode();
      hash = (37 * hash) + INPUT_KEY_FIELD_NUMBER;
      hash = (53 * hash) + getInputKey().hashCode();
      hash = (37 * hash) + INPUT_TRACK_FIELD_NUMBER;
      hash = (53 * hash) + getInputTrack();
      hash = (37 * hash) + INPUT_CHANNEL_FIELD_NUMBER;
      hash = (53 * hash) + getInputChannel();
      hash = (37 * hash) + OUTPUT_CHANNEL_FIELD_NUMBER;
      hash = (53 * hash) + getOutputChannel();
      hash = (37 * hash) + GAIN_DB_FIELD_NUMBER;
      hash =
          (53 * hash)
              + com.google.protobuf.Internal.hashLong(
                  java.lang.Double.doubleToLongBits(getGainDb()));
      hash = (29 * hash) + getUnknownFields().hashCode();
      memoizedHashCode = hash;
      return hash;
    }
<pre>
Audio volume control in dB. Negative values decrease volume,
positive values increase. The default is 0.
</pre>

<code>double gain_db = 6;</code>

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