diff --git a/Signs.md b/Signs.md
index 0d73b92..006a311 100644
--- a/Signs.md
+++ b/Signs.md
@@ -543,6 +543,8 @@ A bed sign used for bedwars. The number is the team number just like start signs
 
 Sound message signs use the same sound identifiers as the vanilla command. You can use custom sounds provided by a resourcepack.
 
+The second line contains the [sound category](https://hub.spigotmc.org/javadocs/bukkit/org/bukkit/SoundCategory.html), volume & pitch.
+
 ***
 
 ### Action bar