diff --git a/.gitignore b/.gitignore
index c140615..bbc5b29 100644
--- a/.gitignore
+++ b/.gitignore
@@ -57,4 +57,6 @@ Gemfile.lock
 # .rubocop-https?--*
 
 # test
-quick.rb
\ No newline at end of file
+quick.rb
+
+.vscode/
\ No newline at end of file
diff --git a/examples/events/main.rb b/examples/events/main.rb
index de28054..bbab054 100644
--- a/examples/events/main.rb
+++ b/examples/events/main.rb
@@ -28,7 +28,7 @@ class Main
 
   def on_ldirty
     @vm.bus.each do |bus|
-      puts "#{bus} #{bus.levels.all}" if bus.levels.isdirty?
+      puts "#{bus} #{bus.levels.all.join(" ")}" if bus.levels.isdirty?
     end
   end
 end
diff --git a/lib/voicemeeter/base.rb b/lib/voicemeeter/base.rb
index 64cbd5c..c7510f0 100644
--- a/lib/voicemeeter/base.rb
+++ b/lib/voicemeeter/base.rb
@@ -64,7 +64,7 @@ module Voicemeeter
       cache[:strip_buf], cache[:bus_buf] = _get_levels
       !(
         cache[:strip_level] == cache[:strip_buf] &&
-          @cache[:bus_level] == cache[:bus_buf]
+          cache[:bus_level] == cache[:bus_buf]
       )
     end
 
diff --git a/lib/voicemeeter/event.rb b/lib/voicemeeter/event.rb
index 0ff2f19..bc08444 100644
--- a/lib/voicemeeter/event.rb
+++ b/lib/voicemeeter/event.rb
@@ -17,8 +17,8 @@ module Voicemeeter
         @callbacks.each do |callback|
           if callback.respond_to? :on_update
             callback.on_update { event.to_s[3..] }
-          else
-            callback.call # if callback == event
+          elsif callback.name == event
+            callback.call
           end
         end
       end
diff --git a/lib/voicemeeter/worker.rb b/lib/voicemeeter/worker.rb
index 58f4775..143db6b 100644
--- a/lib/voicemeeter/worker.rb
+++ b/lib/voicemeeter/worker.rb
@@ -21,6 +21,8 @@ module Voicemeeter
     def init_worker(que)
       logger.info "Listening for #{event.get.join(", ")} events"
       @cache[:strip_level], @cache[:bus_level] = _get_levels
+      @cache[:strip_comp] = Array.new(kind.num_strip_levels, false)
+      @cache[:bus_comp] = Array.new(kind.num_bus_levels, false)
       @running = true
       Thread.new do
         loop do
@@ -33,12 +35,8 @@ module Voicemeeter
           on_event :on_mdirty if e_from_que == :mdirty && mdirty?
           on_event :on_midi if e_from_que == :midi && get_midi_message
           if e_from_que == :ldirty && ldirty?
-            cache[:strip_comp] = cache[:strip_level].map.with_index do |x, i|
-              !(x == cache[:strip_buf][i])
-            end
-            cache[:bus_comp] = cache[:bus_level].map.with_index do |x, i|
-              !(x == cache[:bus_buf][i])
-            end
+            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]
             on_event :on_ldirty