diff --git a/examples/events/main.rb b/examples/events/main.rb
index bbab054..98ab905 100644
--- a/examples/events/main.rb
+++ b/examples/events/main.rb
@@ -1,7 +1,4 @@
 require_relative "../../lib/voicemeeter"
-require "easy_logging"
-
-EasyLogging.level = Logger::DEBUG
 
 class Main
   def initialize
diff --git a/lib/voicemeeter/base.rb b/lib/voicemeeter/base.rb
index cf1cf44..ef42e52 100644
--- a/lib/voicemeeter/base.rb
+++ b/lib/voicemeeter/base.rb
@@ -4,11 +4,12 @@ require_relative "kinds"
 require_relative "midi"
 require_relative "event"
 require_relative "worker"
-require "easy_logging"
+require_relative "errors"
+require_relative "logger"
 
 module Voicemeeter
   class Base
-    # include EasyLogging
+    include Logging
     include Worker
     include Events::Callbacks
 
@@ -36,7 +37,7 @@ module Voicemeeter
     end
 
     def login
-      runvm if CBindings.call(:bind_login, ok: [0, 1]) == 1
+      run_voicemeeter(kind.name) if CBindings.call(:bind_login, ok: [0, 1]) == 1
       clear_dirty
       logger.info "Successfully logged into #{self} version #{version}"
       if event.any?
@@ -68,25 +69,21 @@ module Voicemeeter
       )
     end
 
-    private
-
     def clear_dirty
       while pdirty? || mdirty?
       end
     end
 
-    def runvm
+    def run_voicemeeter(kind_id)
       kinds = {
         basic: Kinds::KindEnum::BASIC,
         banana: Kinds::KindEnum::BANANA,
         potato: (Install::OS_BITS == 64) ? 6 : Kinds::KindEnum::POTATO
       }
-      CBindings.call(:bind_run_voicemeeter, kinds[kind.name])
+      CBindings.call(:bind_run_voicemeeter, kinds[kind_id])
       sleep(1)
     end
 
-    public
-
     def type
       ckind = FFI::MemoryPointer.new(:long, 1)
       CBindings.call(:bind_get_voicemeeter_type, ckind)
@@ -147,7 +144,7 @@ module Voicemeeter
       cget.read_float
     end
 
-    def _get_levels
+    private def _get_levels
       [
         (0...kind.num_strip_levels).map do |i|
           get_level(cache[:strip_mode], i)
@@ -158,7 +155,7 @@ module Voicemeeter
 
     def get_num_devices(dir)
       unless %i[in out].include? dir
-        raise VMError.new("dir got: #{dir}, expected in or out")
+        raise Errors::VMError.new("dir got: #{dir}, expected :in or :out")
       end
       if dir == :in
         CBindings.call(:bind_input_get_device_number, exp: ->(x) { x >= 0 })
@@ -169,7 +166,7 @@ module Voicemeeter
 
     def get_device_description(index, dir)
       unless %i[in out].include? dir
-        raise VMError.new("dir got: #{dir}, expected in or out")
+        raise Errors::VMError.new("dir got: #{dir}, expected :in or :out")
       end
       ctype = FFI::MemoryPointer.new(:long, 1)
       cname = FFI::MemoryPointer.new(:string, 256, true)
diff --git a/lib/voicemeeter/cbindings.rb b/lib/voicemeeter/cbindings.rb
index ca4a9c8..a05e558 100644
--- a/lib/voicemeeter/cbindings.rb
+++ b/lib/voicemeeter/cbindings.rb
@@ -15,7 +15,7 @@ module Voicemeeter
     )
     ffi_convention :stdcall
 
-    def self.attach_function(c_name, args, returns)
+    private_class_method def self.attach_function(c_name, args, returns)
       ruby_name = "bind_#{c_name.to_s.delete_prefix("VBVMR_").snakecase}".to_sym
       super(ruby_name, c_name, args, returns)
     end
diff --git a/lib/voicemeeter/configs.rb b/lib/voicemeeter/configs.rb
index 7d4cd08..5f3f918 100644
--- a/lib/voicemeeter/configs.rb
+++ b/lib/voicemeeter/configs.rb
@@ -1,21 +1,24 @@
 require "yaml"
-require "easy_logging"
 require "pathname"
 
 require_relative "kinds"
+require_relative "logger"
+require_relative "errors"
 
 module Voicemeeter
   module Configs
     private
 
     class Loader
-      include EasyLogging
+      include Logging
 
       attr_reader :configs
 
       def initialize(kind)
         @kind = kind
-        @configs = {}
+        @configs = Hash.new do |hash, key|
+          raise Errors::VMError.new("unknown config #{key}. known configs: #{hash.keys}")
+        end
         @reader = FileReader.new(self, kind)
       end
 
@@ -77,7 +80,7 @@ module Voicemeeter
     end
 
     class FileReader
-      include EasyLogging
+      include Logging
 
       def initialize(loader, kind)
         @loader = loader
diff --git a/lib/voicemeeter/event.rb b/lib/voicemeeter/event.rb
index bc08444..57184e0 100644
--- a/lib/voicemeeter/event.rb
+++ b/lib/voicemeeter/event.rb
@@ -1,4 +1,4 @@
-require "easy_logging"
+require_relative "logger"
 
 module Voicemeeter
   module Events
@@ -25,7 +25,7 @@ module Voicemeeter
     end
 
     class Tracker
-      # include EasyLogging
+      include Logging
 
       attr_reader :pdirty, :mdirty, :midi, :ldirty
 
diff --git a/lib/voicemeeter/iremote.rb b/lib/voicemeeter/iremote.rb
index 3957be9..d6cac63 100644
--- a/lib/voicemeeter/iremote.rb
+++ b/lib/voicemeeter/iremote.rb
@@ -1,10 +1,10 @@
 require_relative "errors"
 require_relative "meta"
-require "easy_logging"
+require_relative "logger"
 
 module Voicemeeter
   class IRemote
-    include EasyLogging
+    include Logging
     include MetaFunctions
 
     def initialize(remote, i = nil)
@@ -16,6 +16,8 @@ module Voicemeeter
       "#{self.class.name.split("::").last}#{@index}#{@remote.kind}"
     end
 
+    private
+
     def getter(param, is_string = false)
       logger.debug "getter: #{_cmd(param)}"
       @remote.get(_cmd(param), is_string)
@@ -34,6 +36,8 @@ module Voicemeeter
       raise "Called abstract method: identifier"
     end
 
+    public
+
     def apply(params)
       params.each do |key, val|
         if val.is_a? Hash
diff --git a/lib/voicemeeter/kinds.rb b/lib/voicemeeter/kinds.rb
index 6e529bd..0b8fc28 100644
--- a/lib/voicemeeter/kinds.rb
+++ b/lib/voicemeeter/kinds.rb
@@ -31,14 +31,14 @@ module Voicemeeter
 
     KIND_MAPS = [basic, banana, potato].to_h { |kind| [kind.name, kind] }
 
-    public
-
     module KindEnum
       BASIC = 1
       BANANA = 2
       POTATO = 3
     end
 
+    public
+
     def get(kind_id)
       KIND_MAPS[kind_id]
     end
diff --git a/lib/voicemeeter/logger.rb b/lib/voicemeeter/logger.rb
new file mode 100644
index 0000000..ce9a66b
--- /dev/null
+++ b/lib/voicemeeter/logger.rb
@@ -0,0 +1,11 @@
+require "logger"
+
+module Voicemeeter
+  module Logging
+    def logger
+      @logger = Logger.new($stdout, level: ENV.fetch("LOG_LEVEL", "WARN"))
+      @logger.progname = self.class.name
+      @logger
+    end
+  end
+end
diff --git a/lib/voicemeeter/recorder.rb b/lib/voicemeeter/recorder.rb
index 463db87..c7dc534 100644
--- a/lib/voicemeeter/recorder.rb
+++ b/lib/voicemeeter/recorder.rb
@@ -4,7 +4,6 @@ require_relative "mixins"
 require_relative "errors"
 
 require "date"
-require "easy_logging"
 
 module Voicemeeter
   module Recorder
@@ -16,7 +15,6 @@ module Voicemeeter
     end
 
     class Recorder < IRemote
-      include EasyLogging
       include Mixins::Outputs
 
       attr_reader :mode, :armstrip, :armbus
diff --git a/lib/voicemeeter/worker.rb b/lib/voicemeeter/worker.rb
index 143db6b..08d33e4 100644
--- a/lib/voicemeeter/worker.rb
+++ b/lib/voicemeeter/worker.rb
@@ -1,8 +1,8 @@
-require "easy_logging"
+require_relative "logger"
 
 module Voicemeeter
   module Worker
-    include EasyLogging
+    include Logging
 
     def init_producer(que)
       Thread.new do
diff --git a/voicemeeter.gemspec b/voicemeeter.gemspec
index 040818d..e3c1bf7 100644
--- a/voicemeeter.gemspec
+++ b/voicemeeter.gemspec
@@ -14,7 +14,6 @@ Gem::Specification.new do |spec|
   spec.homepage = "https://rubygems.org/gems/voicemeeter"
   spec.license = "MIT"
   spec.add_runtime_dependency "ffi", "~> 1.9", ">= 1.9.10"
-  spec.add_runtime_dependency "easy_logging", "~> 0.4.0"
   spec.add_development_dependency "rspec", "~> 3.4"
   spec.add_development_dependency "standard", "~> 1.30"
   spec.required_ruby_version = ">= 3.2"