code: function init(entry) {  // {{{2
  /**
   * Socket constructor
   *
   * @param entry {Object} Media player entry
   *
   * @method constructor
   */
  
    if ('volumeSocket' in entry) {
      throw O.log.error(this, 'DUPLICIT_VOLUME', entry.toString());
    }
    entry.volumeSocket = this;
  
    this.entry = entry;
  
    entry.shard.track(entry.dval.volume, this);
  }
docs: @caption Media player to volume client socket
  
  @readme
  Establish a [link] to a volume entry.
  
  @class media.lib.player.volume
  @type class
   Public {{{1