diff --git a/mixer.py b/mixer.py
index 29966b2..aca7804 100755
--- a/mixer.py
+++ b/mixer.py
@@ -12,11 +12,11 @@ class Mixer:
     def __init__(self, ip, port):
         self.sock = socket.create_connection((ip, port))
 
-    A_H_ID = [0x00, 0x00, 0x1A]
+    ALLEN_HEATH_ID = [0x00, 0x00, 0x1A]
     QU_MIXER = [0x50, 0x11]
     MAJOR_MINOR = [0x01, 0x00]
     ALL_CALL_MIDI_CHANNEL = [0x7F]
-    SYSEX_HEADER = A_H_ID + QU_MIXER + MAJOR_MINOR
+    SYSEX_HEADER = ALLEN_HEATH_ID + QU_MIXER + MAJOR_MINOR
     SYSEX_ALL_CALL = SYSEX_HEADER + ALL_CALL_MIDI_CHANNEL
 
     def recv(self):
@@ -117,7 +117,7 @@ class Mixer:
 
         msg_bytes = bytes(a.bytes() + b.bytes() + c.bytes() + d.bytes())
 
-        print (' '.join(f"{b:02X}" for b in msg_bytes))
+        print(' '.join(f"{b:02X}" for b in msg_bytes))
         self.sock.sendall(msg_bytes)
 
     def shutdown(self):
@@ -161,29 +161,30 @@ def main():
     if args.command:
         print(f"Command: {args.command}")
 
-        if args.command == 'get_name_from_qu':
-            mixer = Mixer(args.ip, MIXER_PORT)
-            mixer.get_name_from_qu(0)
+        match args.command:
+            case 'get_name_from_qu':
+                mixer = Mixer(args.ip, MIXER_PORT)
+                mixer.get_name_from_qu(0)
 
-        if args.command == 'get_system_state':
-            mixer = Mixer(args.ip, MIXER_PORT)
-            mixer.get_system_state()
+            case 'get_system_state':
+                mixer = Mixer(args.ip, MIXER_PORT)
+                mixer.get_system_state()
 
-        if args.command == 'shutdown':
-            mixer = Mixer(args.ip, MIXER_PORT)
-            mixer.shutdown()
+            case 'shutdown':
+                mixer = Mixer(args.ip, MIXER_PORT)
+                mixer.shutdown()
 
-        if args.command == 'set_default_layer':
-            mixer = Mixer(args.ip, MIXER_PORT)
-            # mixer.set_layer()
+            case 'set_default_layer':
+                mixer = Mixer(args.ip, MIXER_PORT)
+                mixer.scene_recall(0)
 
-        if args.command == 'watch':
-            mixer = Mixer(args.ip, MIXER_PORT)
-            mixer.watch()
+            case 'watch':
+                mixer = Mixer(args.ip, MIXER_PORT)
+                mixer.watch()
 
-        if args.command == 'scene_recall':
-            mixer = Mixer(args.ip, MIXER_PORT)
-            mixer.scene_recall(0)
+            case 'scene_recall':
+                mixer = Mixer(args.ip, MIXER_PORT)
+                mixer.scene_recall(0)
 
 if __name__ == '__main__':
     main()