diff --git a/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/Pyr0_Piezo_Sensor_V2.x.x.cpp b/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/Pyr0_Piezo_Sensor_V2.x.x.cpp
index af37f29..26bddca 100644
--- a/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/Pyr0_Piezo_Sensor_V2.x.x.cpp
+++ b/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/Pyr0_Piezo_Sensor_V2.x.x.cpp
@@ -156,8 +156,8 @@ void loop() {
 
     // Check voltage of first and second stages and compare against thresholds
     readVin();
-    VComp = analogRead(VCOMP_SENSE_PIN);
-    VFol = analogRead(V_FOLLOW_PIN);
+    VComp = analogReadFast(VCOMP_SENSE_PIN);
+    VFol = analogReadFast(V_FOLLOW_PIN);
 
     VLast = VOld - Vin;
     if (VLast > Hyst || VLast < -Hyst) {
diff --git a/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_function.h b/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_function.h
index fdf588f..4395428 100644
--- a/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_function.h
+++ b/firmware/AVR-Source/Pyr0_Piezo_Sensor_v2.x.x/src/pP_function.h
@@ -12,6 +12,14 @@ void digitalWriteFast(uint8_t pin, uint8_t x) {
   }
 }
 
+int inline analogReadFast(byte ADCpin)
+{ byte ADCSRAoriginal = ADCSRA;
+  ADCSRA = (ADCSRA & B11111000) | 4;
+  int adc = analogRead(ADCpin);
+  ADCSRA = ADCSRAoriginal;
+  return adc;
+}
+
 /*------------------------------------------------*/
 
 void pulse() {