more tiny voice docs

src/client/Client.js

@@ -226,6 +226,10 @@ class Client extends EventEmitter {
     return typeof window !== 'undefined';
   }
 
+  /**
+   * Creates a new voice broadcast
+   * @returns {VoiceBroadcast} the created broadcast
+   */
   createVoiceBroadcast() {
     const broadcast = new VoiceBroadcast(this);
     this.broadcasts.push(broadcast);

src/client/voice/VoiceBroadcast.js

@@ -12,7 +12,7 @@ const ffmpegArguments = [
 ];
 
 /**
- * A voice broadcast that can be played across multiple voice connections
+ * A voice broadcast can be played across multiple voice connections for improved shared-stream efficiency.
  * @extends {EventEmitter}
  */
 class VoiceBroadcast extends EventEmitter {