diff --git a/README.md b/README.md
index 1d37445..e698b7a 100644
--- a/README.md
+++ b/README.md
@@ -683,7 +683,7 @@ example:
 class App():
     def initialize(vm)
         @vm = vm
-        @vm.callback.register(method(:on_pdirty))
+        @vm.register(method(:on_pdirty))
         ...
 
     def on_pdirty
diff --git a/examples/events/main.rb b/examples/events/main.rb
index bf34286..7248bdc 100644
--- a/examples/events/main.rb
+++ b/examples/events/main.rb
@@ -3,7 +3,7 @@ require_relative "../../lib/voicemeeter"
 class Main
   def initialize(vm)
     @vm = vm
-    @vm.callback.register(method(:on_pdirty), method(:on_mdirty), method(:on_midi), method(:on_ldirty))
+    @vm.register(method(:on_pdirty), method(:on_mdirty), method(:on_midi), method(:on_ldirty))
   end
 
   def run
diff --git a/examples/midi/main.rb b/examples/midi/main.rb
index e17b453..b0450af 100644
--- a/examples/midi/main.rb
+++ b/examples/midi/main.rb
@@ -5,7 +5,7 @@ class Main
 
   def initialize(vm)
     @vm = vm
-    @vm.callback.register(self)
+    @vm.register(self)
   end
 
   def run
diff --git a/lib/voicemeeter/base.rb b/lib/voicemeeter/base.rb
index c4f4b3a..3bb9128 100644
--- a/lib/voicemeeter/base.rb
+++ b/lib/voicemeeter/base.rb
@@ -13,10 +13,10 @@ module Voicemeeter
     # Base class for Remote types
     include Logging
     include Worker
+    include Events::Callback
     prepend Util::Cache
 
-    attr_reader :kind, :midi, :event, :callback, :running, :delay, :cache
-    alias_method :observer, :callback
+    attr_reader :kind, :midi, :event, :running, :delay, :cache
 
     RATELIMIT = 0.033
     DELAY = 0.001
@@ -31,7 +31,6 @@ module Voicemeeter
           **(kwargs.select { |k, _| %i[pdirty mdirty ldirty midi].include? k })
         )
       @midi = Midi.new
-      @callback = Events::Callback.new
       @que = Queue.new
       @cache = {strip_mode: 0}
     end
diff --git a/lib/voicemeeter/event.rb b/lib/voicemeeter/event.rb
index 0046411..2415a7a 100644
--- a/lib/voicemeeter/event.rb
+++ b/lib/voicemeeter/event.rb
@@ -2,25 +2,25 @@ require_relative "logger"
 
 module Voicemeeter
   module Events
-    class Callback
-      def initialize
-        @callbacks = []
+    module Callback
+      private def callbacks
+        @callbacks ||= []
       end
 
-      def register(*args)
-        args.each { |callback| @callbacks.append callback }
+      def register(*cbs)
+        cbs.each { |cb| callbacks << cb unless callbacks.include? cb }
       end
 
-      def deregister(*args)
-        @callbacks.reject! { |c| args.include? c }
+      def deregister(*cbs)
+        callbacks.reject! { |cb| cbs.include? cb }
       end
 
-      def trigger(event)
-        @callbacks.each do |callback|
-          if callback.respond_to? :on_update
+      private def trigger(event)
+        callbacks.each do |callback|
+          if callback.is_a? Method
+            callback.call if callback.name == event
+          elsif callback.respond_to? :on_update
             callback.on_update event.to_s[3..]
-          elsif callback.name == event
-            callback.call
           end
         end
       end
diff --git a/lib/voicemeeter/worker.rb b/lib/voicemeeter/worker.rb
index 5e0a741..b87583f 100644
--- a/lib/voicemeeter/worker.rb
+++ b/lib/voicemeeter/worker.rb
@@ -33,15 +33,15 @@ module Voicemeeter
             logger.debug("closing worker thread")
             break
           end
-          callback.trigger :on_pdirty if e_from_que == :pdirty && pdirty?
-          callback.trigger :on_mdirty if e_from_que == :mdirty && mdirty?
-          callback.trigger :on_midi if e_from_que == :midi && get_midi_message
+          trigger :on_pdirty if e_from_que == :pdirty && pdirty?
+          trigger :on_mdirty if e_from_que == :mdirty && mdirty?
+          trigger :on_midi if e_from_que == :midi && get_midi_message
           if e_from_que == :ldirty && ldirty?
             cache[:strip_comp] = cache[:strip_level].zip(cache[:strip_buf]).map { |a, b| a != b }
             cache[:bus_comp] = cache[:bus_level].zip(cache[:bus_buf]).map { |a, b| a != b }
             cache[:strip_level] = cache[:strip_buf]
             cache[:bus_level] = cache[:bus_buf]
-            callback.trigger :on_ldirty
+            trigger :on_ldirty
           end
         end
       end