diff --git a/youtube_dl/extractor/audiomack.py b/youtube_dl/extractor/audiomack.py
index b6f3039c7..73cde78d3 100644
--- a/youtube_dl/extractor/audiomack.py
+++ b/youtube_dl/extractor/audiomack.py
@@ -9,21 +9,21 @@
 
 
 class AudiomackIE(InfoExtractor):
-    _VALID_URL = r'https?://(?:www\.)?audiomack\.com/(song)/(?P<id>[\w/-]+)'
+    _VALID_URL = r'https?://(?:www\.)?audiomack\.com/song/(?P<id>[\w/-]+)'
     IE_NAME = 'audiomack'
     _TESTS = [
-        # audiomack
+        # hosted on audiomack
         {
             'url': 'http://www.audiomack.com/song/roosh-williams/extraordinary',
             'info_dict':
             {
                 'id': '310086',
-                "ext": "mp3",
-                "artist": "Roosh Williams",
+                'ext': 'mp3',
+                'artist': 'Roosh Williams',
                 'title': 'Extraordinary'
             }
         },
-        # audiomack through soundcloud
+        # audiomack wrapper around soundcloud song
         {
             'add_ie': ['Soundcloud'],
             'url': 'http://www.audiomack.com/song/xclusiveszone/take-kare',
@@ -41,12 +41,12 @@ class AudiomackIE(InfoExtractor):
     @staticmethod
     def create_song_dictionary(api_response, album_url_tag, track_no=0):
         # All keys are the same in audiomack api and InfoExtractor format
-        entry = {key: api_response[key] for key in ["title", "artist", "id", "url"] if key in api_response}
+        entry = {key: api_response[key] for key in ['title', 'artist', 'id', 'url'] if key in api_response}
         # Fudge values in the face of missing metadata
-        if "id" not in entry:
-            entry["id"] = track_no
-        if "title" not in entry:
-            entry["title"] = album_url_tag
+        if 'id' not in entry:
+            entry['id'] = track_no
+        if 'title' not in entry:
+            entry['title'] = album_url_tag
         return entry
 
     def _real_extract(self, url):
@@ -57,18 +57,18 @@ def _real_extract(self, url):
 
         # Request the extended version of the api for extra fields like artist and title
         api_response = self._download_json(
-            "http://www.audiomack.com/api/music/url/song/%s?extended=1&_=%d" % (
+            'http://www.audiomack.com/api/music/url/song/%s?extended=1&_=%d' % (
                 album_url_tag, time.time()),
             album_url_tag)
 
         # API is inconsistent with errors
-        if "url" not in api_response or not api_response["url"] or "error" in api_response:
-            raise ExtractorError("Invalid url %s", url)
+        if 'url' not in api_response or not api_response['url'] or 'error' in api_response:
+            raise ExtractorError('Invalid url %s', url)
 
         # Audiomack wraps a lot of soundcloud tracks in their branded wrapper
         # if so, pass the work off to the soundcloud extractor
-        if SoundcloudIE.suitable(api_response["url"]):
-            return {'_type': 'url', 'url': api_response["url"], 'ie_key': 'Soundcloud'}
+        if SoundcloudIE.suitable(api_response['url']):
+            return {'_type': 'url', 'url': api_response['url'], 'ie_key': 'Soundcloud'}
 
         return self.create_song_dictionary(api_response, album_url_tag)
 
@@ -80,17 +80,17 @@ class AudiomackAlbumIE(InfoExtractor):
         # Standard album playlist
         {
             'url': 'http://www.audiomack.com/album/flytunezcom/tha-tour-part-2-mixtape',
-            "playlist_count": 15,
+            'playlist_count': 15,
             'info_dict':
             {
-                'id': "812251",
-                'title': "Tha Tour: Part 2 (Official Mixtape)"
+                'id': '812251',
+                'title': 'Tha Tour: Part 2 (Official Mixtape)'
             }
         },
         # Album playlist ripped from fakeshoredrive with no metadata
         {
-            "url": "http://www.audiomack.com/album/fakeshoredrive/ppp-pistol-p-project",
-            "playlist_count": 10
+            'url': 'http://www.audiomack.com/album/fakeshoredrive/ppp-pistol-p-project',
+            'playlist_count': 10
         }
     ]
 
@@ -99,27 +99,27 @@ def _real_extract(self, url):
         # this title is whatever the user types in, and is rarely
         # the proper song title.  Real metadata is in the api response
         album_url_tag = self._match_id(url)
-        result = {"_type": "playlist", "entries": []}
+        result = {'_type': 'playlist', 'entries': []}
         # There is no one endpoint for album metadata - instead it is included/repeated in each song's metadata
         # Therefore we don't know how many songs the album has and must infi-loop until failure
         track_no = 0
         while True:
             # Get song's metadata
-            api_response = self._download_json("http://www.audiomack.com/api/music/url/album/%s/%d?extended=1&_=%d"
+            api_response = self._download_json('http://www.audiomack.com/api/music/url/album/%s/%d?extended=1&_=%d'
                                                % (album_url_tag, track_no, time.time()), album_url_tag)
 
             # Total failure, only occurs when url is totally wrong
             # Won't happen in middle of valid playlist (next case)
-            if "url" not in api_response or "error" in api_response:
-                raise ExtractorError("Invalid url for track %d of album url %s" % (track_no, url))
+            if 'url' not in api_response or 'error' in api_response:
+                raise ExtractorError('Invalid url for track %d of album url %s' % (track_no, url))
             # URL is good but song id doesn't exist - usually means end of playlist
-            elif not api_response["url"]:
+            elif not api_response['url']:
                 break
             else:
                 # Pull out the album metadata and add to result (if it exists)
-                for resultkey, apikey in [("id", "album_id"), ("title", "album_title")]:
+                for resultkey, apikey in [('id', 'album_id'), ('title', 'album_title')]:
                     if apikey in api_response and resultkey not in result:
                         result[resultkey] = api_response[apikey]
-                result["entries"].append(AudiomackIE.create_song_dictionary(api_response, album_url_tag, track_no))
+                result['entries'].append(AudiomackIE.create_song_dictionary(api_response, album_url_tag, track_no))
             track_no += 1
         return result