Modify pitch of small slimes and magma cubes

mods/ENTITIES/mcl_mobs/api.lua

@@ -107,11 +107,15 @@ local mob_sound = function(self, sound, is_opinion, fixed_pitch)
 		end
 		local pitch
 		if not fixed_pitch then
+			local base_pitch = self.sounds.base_pitch
+			if not base_pitch then
+				base_pitch = 1
+			end
 			if self.child then
-				-- Children have high pitch
-				pitch = 1.5
+				-- Children have higher pitch
+				pitch = base_pitch * 1.5
 			else
-				pitch = 1.0
+				pitch = base_pitch
 			end
 			-- randomize the pitch a bit
 			pitch = pitch + math.random(-10, 10) * 0.005

mods/ENTITIES/mcl_mobs/api.txt

@@ -131,6 +131,7 @@ functions needed for the mob to work properly which contains the following:
    'makes_footstep_sound' when true you can hear mobs walking.
    'sounds'               this is a table with sounds of the mob
       'distance'          maximum distance sounds can be heard, default is 10.
+      'base_pitch'        base pitch to use adult mobs, default is 1.0 (MCL2 extension)
       'random'            played randomly from time to time.
                           also played for overfeeding animal.
       'war_cry'           what you hear when mob starts to attack player. (currently disabled)
@@ -142,6 +143,9 @@ functions needed for the mob to work properly which contains the following:
       'fuse'              sound played when mob explode timer starts.
       'explode'           sound played when mob explodes.
 
+      Note: For all sounds except fuse and explode, the pitch is slightly randomized from the base pitch
+      The pitch of children is 50% higher.
+
    'drops'     table of items that are dropped when mob is killed, fields are:
       'name'   name of item to drop.
       'chance' chance of drop, 1 for always, 2 for 1-in-2 chance etc.