diff --git a/src/index.js b/src/index.js
index a8603fd..88a1313 100644
--- a/src/index.js
+++ b/src/index.js
@@ -84,17 +84,13 @@ const REGEX_PATTERNS = {
     },
     audioTags: {
         Atmos: /(?<![^ [_\-.])(atmos)(?=[ \]_.-]|$)/i,
-        "DDP5.1":
-            /(?<![^ [_\-.])(ddp\.1|dolby[ .\-_]?digital[ .\-_]?plus[ .\-_]?5\.1)(?=[ \]_.-]|$)/i,
-        "Dolby Digital Plus":
-            /(?<![^ [_\-.])(ddp|dolby[ .\-_]?digital[ .\-_]?plus)(?=[ \]_.-]|$)/i,
-        "Dolby Digital":
-            /(?<![^ [_\-.])(dd|dolby[ .\-_]?digital)(?=[ \]_.-]|$)/i,
-        "DTS HD": /(?<![^ [_\-.])(dts[ .\-_]?hd[ .\-_]?ma)(?=[ \]_.-]|$)/i,
+        "Dolby Digital Plus": /(?<![^ [_\-.])((?:ddp|dolby[ .\-_]?digital[ .\-_]?plus)(?:[ .\-_]?5\.1)?)(?=[ \]_.-]|$)/i,
+        "Dolby Digital": /(?<![^ [_\-.])((?:dd|dolby[ .\-_]?digital)(?:[ .\-_]?5\.1)?)(?=[ \]_.-]|$)/i,
+        "DTS-HD": /(?<![^ [_\-.])(dts[ .\-_]?hd[ .\-_]?ma?)(?=[ \]_.-]|$)/i,
         DTS: /(?<![^ [_\-.])(dts)(?=[ \]_.-]|$)/i,
         TrueHD: /(?<![^ [_\-.])(truehd)(?=[ \]_.-]|$)/i,
-        5.1: /(?<![^ [_\-.])(5\.1)(?=[ \]_.-]|$)/i,
-        7.1: /(?<![^ [_\-.])(7\.1)(?=[ \]_.-]|$)/i,
+        5.1: /(?<![^ [_\-.])((?:ddp|dd)?[ .\-_]?5\.1)(?=[ \]_.-]|$)/i,
+        7.1: /(?<![^ [_\-.])((?:ddp|dd)?[ .\-_]?7\.1)(?=[ \]_.-]|$)/i,
         AC3: /(?<![^ [_\-.])(ac[ .\-_]?3)(?=[ \]_.-]|$)/i,
         AAC: /(?<![^ [_\-.])(aac)(?=[ \]_.-]|$)/i,
     },