diff --git a/examples/music.py b/examples/music.py
index 185481cb..d3a0d439 100644
--- a/examples/music.py
+++ b/examples/music.py
@@ -184,7 +184,7 @@ async def play(self, ctx, *, query: str):
         results = await player.node.get_tracks(query)
 
         # Results could be None if Lavalink returns an invalid response (non-JSON/non-200 (OK)).
-        # ALternatively, resullts.tracks could be an empty array if the query yielded no tracks.
+        # Alternatively, results.tracks could be an empty array if the query yielded no tracks.
         if not results or not results.tracks:
             return await ctx.send('Nothing found!')
 
diff --git a/lavalink/__init__.py b/lavalink/__init__.py
index e16325f3..bd59a31f 100644
--- a/lavalink/__init__.py
+++ b/lavalink/__init__.py
@@ -4,7 +4,7 @@
 __author__ = 'Devoxin'
 __license__ = 'MIT'
 __copyright__ = 'Copyright 2017-present Devoxin'
-__version__ = '4.0.3'
+__version__ = '4.0.4'
 
 
 import inspect
@@ -25,7 +25,8 @@
 from .nodemanager import NodeManager
 from .playermanager import PlayerManager
 from .stats import Penalty, Stats
-from .utils import decode_track, format_time, parse_time, timestamp_to_millis
+from .utils import (decode_track, encode_track, format_time, parse_time,
+                    timestamp_to_millis)
 from .websocket import WebSocket
 
 
diff --git a/lavalink/client.py b/lavalink/client.py
index 876206c5..136c0ab1 100644
--- a/lavalink/client.py
+++ b/lavalink/client.py
@@ -383,7 +383,7 @@ async def _hook_wrapper(hook, event):
                 #  clarity.
 
         tasks = [_hook_wrapper(hook, event) for hook in itertools.chain(generic_hooks, targeted_hooks)]
-        await asyncio.wait(tasks)
+        await asyncio.gather(*tasks)
 
         _log.debug('Dispatched \'%s\' to all registered hooks', type(event).__name__)
 
diff --git a/lavalink/stats.py b/lavalink/stats.py
index 9d80134f..1bb3f805 100644
--- a/lavalink/stats.py
+++ b/lavalink/stats.py
@@ -45,15 +45,8 @@ class Penalty:
     def __init__(self, stats):
         self.player_penalty = stats.playing_players
         self.cpu_penalty = 1.05 ** (100 * stats.system_load) * 10 - 10
-        self.null_frame_penalty = 0
-        self.deficit_frame_penalty = 0
-
-        if stats.frames_nulled != -1:
-            self.null_frame_penalty = (1.03 ** (500 * (stats.frames_nulled / 3000))) * 300 - 300
-            self.null_frame_penalty *= 2
-
-        if stats.frames_deficit != -1:
-            self.deficit_frame_penalty = (1.03 ** (500 * (stats.frames_deficit / 3000))) * 600 - 600
+        self.null_frame_penalty = ((1.03 ** (500 * (stats.frames_nulled / 3000))) * 300 - 300) * 2
+        self.deficit_frame_penalty = (1.03 ** (500 * (stats.frames_deficit / 3000))) * 600 - 600
 
         self.total = self.player_penalty + self.cpu_penalty + self.null_frame_penalty + self.deficit_frame_penalty
 
@@ -128,9 +121,9 @@ def __init__(self, node, data):
         self.lavalink_load = cpu['lavalinkLoad']
 
         frame_stats = data.get('frameStats', {})
-        self.frames_sent = frame_stats.get('sent', -1)
-        self.frames_nulled = frame_stats.get('nulled', -1)
-        self.frames_deficit = frame_stats.get('deficit', -1)
+        self.frames_sent = frame_stats.get('sent', 0)
+        self.frames_nulled = frame_stats.get('nulled', 0)
+        self.frames_deficit = frame_stats.get('deficit', 0)
         self.penalty = Penalty(self)
 
     @classmethod
diff --git a/lavalink/utils.py b/lavalink/utils.py
index 59ff63ae..d5babdfd 100644
--- a/lavalink/utils.py
+++ b/lavalink/utils.py
@@ -22,9 +22,10 @@
 SOFTWARE.
 """
 import struct
+from base64 import b64encode
 from typing import Tuple
 
-from .datarw import DataReader
+from .datarw import DataReader, DataWriter
 from .models import AudioTrack
 
 
@@ -159,23 +160,23 @@ def decode_track(track: str) -> AudioTrack:
     return AudioTrack(track_object, 0, position=position, encoder_version=version)
 
 
-# def encode_track(track: dict):
-#     assert {'title', 'author', 'length', 'identifier', 'is_stream', 'uri', 'source', 'position'} == track.keys()
+def encode_track(track: dict):
+    assert {'title', 'author', 'length', 'identifier', 'isStream', 'uri', 'sourceName', 'position'} == track.keys()
 
-#     writer = DataWriter()
+    writer = DataWriter()
 
-#     version = struct.pack('B', 2)
-#     writer.write_byte(version)
-#     writer.write_utf(track['title'])
-#     writer.write_utf(track['author'])
-#     writer.write_long(track['length'])
-#     writer.write_utf(track['identifier'])
-#     writer.write_boolean(track['is_stream'])
-#     writer.write_boolean(track['uri'])
-#     writer.write_utf(track['uri'])
-#     writer.write_utf(track['source'])
-#     writer.write_long(track['position'])
+    version = struct.pack('B', 2)
+    writer.write_byte(version)
+    writer.write_utf(track['title'])
+    writer.write_utf(track['author'])
+    writer.write_long(track['length'])
+    writer.write_utf(track['identifier'])
+    writer.write_boolean(track['isStream'])
+    writer.write_boolean(track['uri'])
+    writer.write_utf(track['uri'])
+    writer.write_utf(track['sourceName'])
+    writer.write_long(track['position'])
 
-#     enc = writer.finish()
-#     b64 = b64encode(enc)
-#     return b64
+    enc = writer.finish()
+    b64 = b64encode(enc)
+    return b64