fixed __init__.py on players

bot/player/__init__.py

@@ -105,6 +105,7 @@ class Player:
             self.cache_manager.save()
         self._player.pause = False
         self._player.play(arg)
+        self._player.volume = self.volume
 
     def next(self) -> None:
         track_index = self.track_index
@@ -156,7 +157,7 @@ class Player:
     def play_by_index(self, index: int) -> None:
         if index < len(self.track_list) and index >= (0 - len(self.track_list)):
             self.track = self.track_list[index]
-            self.track_index = self.track_list.index(self.track)
+            self.track_index = index
             self._play(self.track.url)
             self.state = State.Playing
         else: