Extracted volumeDown to seperate file

src/main.cpp

@@ -1,10 +1,8 @@
 #include <Arduino.h>
-#include <pinDefinitions.h>
+#include <constants.h>
 #include <potControlls.h>
 #include <ledControlls.h>
-
-const int USER_STEPS = 2;
-const int STAFF_STEPS = 16;
+#include <userFunctions.h>
 
 int maxVolume = 64;
 int userVolume = 64;
@@ -197,26 +195,7 @@ void loop()
   // Remote C - Volume Down
   if (debounceRead(REMOTE_C) && !(oldUserVolume > userVolume))
   {
-    if ((userVolume - USER_STEPS) < 0)
-    {
-      for (int i = 0; i < userVolume; i++)
-      {
-        potDecrement();
-      }
-
-      userVolume = 0;
-      oldUserVolume = userVolume;
-    }
-    else
-    {
-      for (int i = 0; i < USER_STEPS; i++)
-      {
-        potDecrement();
-      }
-
-      userVolume -= USER_STEPS;
-      oldUserVolume = userVolume;
-    }
+    volumeDown(&userVolume, &oldUserVolume);
   }
 }