diff --git a/Trinket_Gemma_Mini_Theramin/Trinket_Gemma_Mini_Theramin.py b/Trinket_Gemma_Mini_Theramin/Trinket_Gemma_Mini_Theramin.py
index 77432bd23..d270e9459 100644
--- a/Trinket_Gemma_Mini_Theramin/Trinket_Gemma_Mini_Theramin.py
+++ b/Trinket_Gemma_Mini_Theramin/Trinket_Gemma_Mini_Theramin.py
@@ -6,28 +6,22 @@
 # and output tone to GPIO #0 (digital 0)
 
 import board
+import pulseio
 import analogio
-import digitalio
 import time
 
-speaker_pin   = board.D0  # Speaker is connected to this DIGITAL pin
 photocell_pin = board.A1  # CdS photocell connected to this ANALOG pin
+speaker_pin   = board.D0  # Speaker is connected to this DIGITAL pin
 scale         = 0.03      # Change this to adjust tone scale
 
-readpin  = analogio.AnalogIn(photocell_pin)
-writepin = digitalio.DigitalInOut(speaker_pin)
-writepin.direction = digitalio.Direction.OUTPUT
+# Initialize input/output pins
+photocell = analogio.AnalogIn(photocell_pin)
+pwm       = pulseio.PWMOut(speaker_pin, variable_frequency=True, duty_cycle=0)
 
 while True:  # Loop forever...
 	# Read photocell analog pin and convert voltage to frequency
-	freq_hz = 220 + readpin.value * scale
-
-	delay_amount = 0.5 / freq_hz     # 1/2 Frequency
-	note_start   = time.monotonic()  # Time when note started
-	while time.monotonic() - note_start < 0.4:  # For 400 milliseconds...
-		writepin.value = True    # Set pin high
-		time.sleep(delay_amount) # Wait for 1/2 of note frequency
-		writepin.value = False   # Set pin low
-		time.sleep(delay_amount) # Wait for other 1/2 of note freq.
-
-	time.sleep(0.05)  # Delay 50 ms between notes (also adjustable)
+	pwm.frequency  = 220 + int(scale * float(photocell.value))
+	pwm.duty_cycle = 32767  # 50% duty cycle
+	time.sleep(0.4)         # Play for 400 ms (adjust to your liking)
+	pwm.duty_cycle = 0      # Stop playing
+	time.sleep(0.05)        # Delay 50 ms between notes (also adjustable)