voice: add documentation to VoiceBroadcast

src/client/voice/VoiceBroadcast.js

@@ -27,6 +27,10 @@ class VoiceBroadcast extends EventEmitter {
      * @type {Client}
      */
     this.client = client;
+    /**
+     * The dispatchers playing this broadcast
+     * @type {Set<StreamDispatcher>}
+     */
     this.dispatchers = new DispatcherSet(this);
     this.player = new BroadcastAudioPlayer(this);
   }

src/client/voice/dispatcher/BroadcastDispatcher.js

@@ -29,6 +29,12 @@ class BroadcastDispatcher extends StreamDispatcher {
     super._destroy(err, cb);
   }
 
+  /**
+   * Set the bitrate of the current Opus encoder if using a compatible Opus stream.
+   * @param {number} value New bitrate, in kbps
+   * If set to 'auto', 48kbps will be used
+   * @returns {boolean} true if the bitrate has been successfully changed.
+   */
   setBitrate(value) {
     if (!value || !this.streams.opus || !this.streams.opus.setBitrate) return false;
     const bitrate = value === 'auto' ? 48 : value;