knobs module takes an attribute 'values'

knob.py

@@ -4,13 +4,13 @@ from colors import *
 
 class Knob:
     
-    def __init__(self, group, name, radius, position):
+    def __init__(self, group, name, radius, position, value = 0):
         self.group = group
         self.name = name
         self.color = color_primary
         self.radius = radius
         self.position = position
-        self.value = 0
+        self.value = value
         self.focused = False
 
     def set_value(self, value):