diff --git a/app/src/main/java/xdsopl/robot36/Decoder.java b/app/src/main/java/xdsopl/robot36/Decoder.java
index f03a674..6e38086 100644
--- a/app/src/main/java/xdsopl/robot36/Decoder.java
+++ b/app/src/main/java/xdsopl/robot36/Decoder.java
@@ -348,6 +348,7 @@ public class Decoder {
 				lines = last20msScanLines;
 			}
 			if (mode != null && pulses != null && lines != null) {
+				mode.reset();
 				lastMode = mode;
 				lastSyncPulseIndex = mode.getFirstSyncPulseIndex();
 				lastScanLineSamples = mode.getScanLineSamples();
diff --git a/app/src/main/java/xdsopl/robot36/Mode.java b/app/src/main/java/xdsopl/robot36/Mode.java
index e229aa0..819a6e5 100644
--- a/app/src/main/java/xdsopl/robot36/Mode.java
+++ b/app/src/main/java/xdsopl/robot36/Mode.java
@@ -15,5 +15,7 @@ public interface Mode {
 
 	int getScanLineSamples();
 
+	void reset();
+
 	boolean decodeScanLine(PixelBuffer pixelBuffer, float[] scratchBuffer, float[] scanLineBuffer, int scopeBufferWidth, int syncPulseIndex, int scanLineSamples, float frequencyOffset);
 }
diff --git a/app/src/main/java/xdsopl/robot36/PaulDon.java b/app/src/main/java/xdsopl/robot36/PaulDon.java
index 1690c45..2f7338d 100644
--- a/app/src/main/java/xdsopl/robot36/PaulDon.java
+++ b/app/src/main/java/xdsopl/robot36/PaulDon.java
@@ -70,6 +70,10 @@ public class PaulDon implements Mode {
 		return scanLineSamples;
 	}
 
+	@Override
+	public void reset() {
+	}
+
 	@Override
 	public boolean decodeScanLine(PixelBuffer pixelBuffer, float[] scratchBuffer, float[] scanLineBuffer, int scopeBufferWidth, int syncPulseIndex, int scanLineSamples, float frequencyOffset) {
 		if (syncPulseIndex + beginSamples < 0 || syncPulseIndex + endSamples > scanLineBuffer.length)
diff --git a/app/src/main/java/xdsopl/robot36/RGBDecoder.java b/app/src/main/java/xdsopl/robot36/RGBDecoder.java
index 040eb43..5afc2f1 100644
--- a/app/src/main/java/xdsopl/robot36/RGBDecoder.java
+++ b/app/src/main/java/xdsopl/robot36/RGBDecoder.java
@@ -63,6 +63,10 @@ public class RGBDecoder implements Mode {
 		return scanLineSamples;
 	}
 
+	@Override
+	public void reset() {
+	}
+
 	@Override
 	public boolean decodeScanLine(PixelBuffer pixelBuffer, float[] scratchBuffer, float[] scanLineBuffer, int scopeBufferWidth, int syncPulseIndex, int scanLineSamples, float frequencyOffset) {
 		if (syncPulseIndex + beginSamples < 0 || syncPulseIndex + endSamples > scanLineBuffer.length)
diff --git a/app/src/main/java/xdsopl/robot36/RawDecoder.java b/app/src/main/java/xdsopl/robot36/RawDecoder.java
index 97b62d5..0dc38d0 100644
--- a/app/src/main/java/xdsopl/robot36/RawDecoder.java
+++ b/app/src/main/java/xdsopl/robot36/RawDecoder.java
@@ -41,6 +41,10 @@ public class RawDecoder implements Mode {
 		return -1;
 	}
 
+	@Override
+	public void reset() {
+	}
+
 	@Override
 	public boolean decodeScanLine(PixelBuffer pixelBuffer, float[] scratchBuffer, float[] scanLineBuffer, int scopeBufferWidth, int syncPulseIndex, int scanLineSamples, float frequencyOffset) {
 		if (syncPulseIndex < 0 || syncPulseIndex + scanLineSamples > scanLineBuffer.length)
diff --git a/app/src/main/java/xdsopl/robot36/Robot_36_Color.java b/app/src/main/java/xdsopl/robot36/Robot_36_Color.java
index 1b6b7f0..d11ee80 100644
--- a/app/src/main/java/xdsopl/robot36/Robot_36_Color.java
+++ b/app/src/main/java/xdsopl/robot36/Robot_36_Color.java
@@ -73,6 +73,11 @@ public class Robot_36_Color implements Mode {
 		return scanLineSamples;
 	}
 
+	@Override
+	public void reset() {
+		lastEven = false;
+	}
+
 	@Override
 	public boolean decodeScanLine(PixelBuffer pixelBuffer, float[] scratchBuffer, float[] scanLineBuffer, int scopeBufferWidth, int syncPulseIndex, int scanLineSamples, float frequencyOffset) {
 		if (syncPulseIndex + beginSamples < 0 || syncPulseIndex + endSamples > scanLineBuffer.length)
diff --git a/app/src/main/java/xdsopl/robot36/Robot_72_Color.java b/app/src/main/java/xdsopl/robot36/Robot_72_Color.java
index 41a6e88..b193cf8 100644
--- a/app/src/main/java/xdsopl/robot36/Robot_72_Color.java
+++ b/app/src/main/java/xdsopl/robot36/Robot_72_Color.java
@@ -71,6 +71,10 @@ public class Robot_72_Color implements Mode {
 		return scanLineSamples;
 	}
 
+	@Override
+	public void reset() {
+	}
+
 	@Override
 	public boolean decodeScanLine(PixelBuffer pixelBuffer, float[] scratchBuffer, float[] scanLineBuffer, int scopeBufferWidth, int syncPulseIndex, int scanLineSamples, float frequencyOffset) {
 		if (syncPulseIndex + beginSamples < 0 || syncPulseIndex + endSamples > scanLineBuffer.length)