diff --git a/denonavr/const.py b/denonavr/const.py
index 311d4cf..af9d345 100644
--- a/denonavr/const.py
+++ b/denonavr/const.py
@@ -213,6 +213,7 @@
         "DOLBY SURROUND",
         "DOLBY D + +DOLBY SURROUND",
         "NEURAL",
+        "NEURAL:X",
         "DOLBY HD",
         "DOLBY HD + DOLBY SURROUND",
         "MULTI IN + DSUR",
@@ -228,6 +229,7 @@
         "DOLBY AUDIO - TRUEHD + DSUR",
         "DOLBY AUDIO - DOLBY TRUEHD",
         "DOLBY AUDIO - TRUEHD + NEURAL:X",
+        "DOLBY AUDIO - DD + NEURAL:X",
         "DOLBY AUDIO - DD + DSUR",
         "DOLBY AUDIO - DD+   + NEURAL:X",
         "DOLBY AUDIO - DD+   + DSUR",