diff --git a/Circuit_Playground_Express_IR_Treasure_Hunt/CPX_Treasure/code.py b/Circuit_Playground_Express_IR_Treasure_Hunt/CPX_Treasure/code.py
index e3e304aad..e94cf4a47 100644
--- a/Circuit_Playground_Express_IR_Treasure_Hunt/CPX_Treasure/code.py
+++ b/Circuit_Playground_Express_IR_Treasure_Hunt/CPX_Treasure/code.py
@@ -19,9 +19,9 @@
 pulseout = pulseio.PulseOut(board.IR_TX, frequency=38000, duty_cycle=2 ** 15)
 
 # Create an encoder that will take numbers and turn them into IR pulses
-encoder = adafruit_irremote.GenericTransmit(header=[9500, 4500],
-                                            one=[550, 550],
-                                            zero=[550, 1700],
+encoder = adafruit_irremote.GenericTransmit(header=[9000, 4500],
+                                            one=[560, 1700],
+                                            zero=[560, 560],
                                             trail=0)
 
 while True:
diff --git a/Circuit_Playground_Express_IR_Zombie_Game/code.py b/Circuit_Playground_Express_IR_Zombie_Game/code.py
index c482905d5..c889c609a 100755
--- a/Circuit_Playground_Express_IR_Zombie_Game/code.py
+++ b/Circuit_Playground_Express_IR_Zombie_Game/code.py
@@ -28,8 +28,10 @@
 # Create a 'pulseio' output, to send infrared signals on the IR transmitter @ 38KHz
 pulseout = pulseio.PulseOut(board.IR_TX, frequency=38000, duty_cycle=2 ** 15)
 # Create an encoder that will take numbers and turn them into NEC IR pulses
-encoder = adafruit_irremote.GenericTransmit(header=[9500, 4500], one=[550, 550],
-                                            zero=[550, 1700], trail=0)
+encoder = adafruit_irremote.GenericTransmit(header=[9000, 4500],
+                                            one=[560, 1700],
+                                            zero=[560, 560],
+                                            trail=0)
 
 # Set between 0 and 1 to set LED pulse speed. Smaller numbers are slower.
 healer_led_pulse = 0.008
diff --git a/Circuit_Playground_Express_and_IR/CPX_IR_CPX_transmit/code.py b/Circuit_Playground_Express_and_IR/CPX_IR_CPX_transmit/code.py
index 22dc97e00..7b3d778bf 100644
--- a/Circuit_Playground_Express_and_IR/CPX_IR_CPX_transmit/code.py
+++ b/Circuit_Playground_Express_and_IR/CPX_IR_CPX_transmit/code.py
@@ -11,8 +11,10 @@
 # Create a 'pulseio' output, to send infrared signals on the IR transmitter @ 38KHz
 pulseout = pulseio.PulseOut(board.IR_TX, frequency=38000, duty_cycle=2 ** 15)
 # Create an encoder that will take numbers and turn them into NEC IR pulses
-encoder = adafruit_irremote.GenericTransmit(header=[9500, 4500], one=[550, 550],
-                                            zero=[550, 1700], trail=0)
+encoder = adafruit_irremote.GenericTransmit(header=[9000, 4500],
+                                            one=[560, 1700],
+                                            zero=[560, 560],
+                                            trail=0)
 
 while True:
     if cpx.button_a:
diff --git a/IrRobotControl/glove/code.py b/IrRobotControl/glove/code.py
index 3eafa211f..accacb0b8 100644
--- a/IrRobotControl/glove/code.py
+++ b/IrRobotControl/glove/code.py
@@ -33,9 +33,9 @@
 pulseout = pulseio.PulseOut(board.IR_TX, frequency=38000, duty_cycle=2 ** 15)
 
 # Create an encoder that will take numbers and turn them into IR pulses
-encoder = adafruit_irremote.GenericTransmit(header=[9500, 4500],
-                                            one=[550, 550],
-                                            zero=[550, 1700],
+encoder = adafruit_irremote.GenericTransmit(header=[9000, 4500],
+                                            one=[560, 1700],
+                                            zero=[560, 560],
                                             trail=0)
 
 def log(s):
diff --git a/STEMMA_IR_LED_Emitter/code.py b/STEMMA_IR_LED_Emitter/code.py
index 599daab27..b2294ac74 100644
--- a/STEMMA_IR_LED_Emitter/code.py
+++ b/STEMMA_IR_LED_Emitter/code.py
@@ -10,16 +10,17 @@
 # Create a 'PulseOut' to send infrared signals on the IR transmitter @ 38KHz
 pulseout = pulseio.PulseOut(board.D5, frequency=38000, duty_cycle=2**15)
 # Create an encoder that will take numbers and turn them into NEC IR pulses
-emitter = adafruit_irremote.GenericTransmit(
-    header=[9500, 4500], one=[550, 550], zero=[550, 1700], trail=0
-)
+encoder = adafruit_irremote.GenericTransmit(header=[9000, 4500],
+                                            one=[560, 1700],
+                                            zero=[560, 560],
+                                            trail=0)
 
 #  count variable
 count = 0
 
 while True:
 	#  send IR pulse
-    emitter.transmit(pulseout, [255, 2, 255, 0])
+    encoder.transmit(pulseout, [255, 2, 255, 0])
 	#  increase count
     count += 1
 	#  print to REPL