diff --git a/src/PamguardMVC/PamDataBlock.java b/src/PamguardMVC/PamDataBlock.java
index 2b987ffa..2ad1d09e 100644
--- a/src/PamguardMVC/PamDataBlock.java
+++ b/src/PamguardMVC/PamDataBlock.java
@@ -2078,6 +2078,9 @@ public class PamDataBlock<Tunit extends PamDataUnit> extends PamObservable {
 		/*
 		 * Doesnt notify it's own parent to avoid an infinite loop
 		 */
+		if (Float.isNaN(sampleRate)) {
+			System.out.println("NaN sample rate being set in " + getLongDataName());
+		}
 		if (notify) {
 			for (int i = 0; i < countObservers(); i++) {
 				if (getPamObserver(i).getObserverObject() != parentProcess) {
diff --git a/src/soundtrap/STAcquisitionControl.java b/src/soundtrap/STAcquisitionControl.java
index 09eebc77..bfad1da2 100644
--- a/src/soundtrap/STAcquisitionControl.java
+++ b/src/soundtrap/STAcquisitionControl.java
@@ -28,6 +28,7 @@ import java.awt.Component;
 
 import Acquisition.AcquisitionControl;
 import Acquisition.DaqSystem;
+import PamController.PamControlledUnitSettings;
 
 /**
  * @author SCANS
@@ -102,6 +103,18 @@ public class STAcquisitionControl extends AcquisitionControl {
 		return stDaqSystem;
 	}
 
+	@Override
+	public boolean restoreSettings(PamControlledUnitSettings pamControlledUnitSettings) {
+		// TODO Auto-generated method stub
+		boolean ok =  super.restoreSettings(pamControlledUnitSettings);
+		if (Float.isNaN(this.getAcquisitionParameters().sampleRate)) {
+			System.out.println("Nan sample rate read back in sound trap data control. ");
+			this.getAcquisitionParameters().sampleRate = 384000.f;
+		}
+		
+		return ok;
+	}
+
 	
 
 }
diff --git a/src/soundtrap/STAcquisitionProcess.java b/src/soundtrap/STAcquisitionProcess.java
index caf2583a..1b99ef31 100644
--- a/src/soundtrap/STAcquisitionProcess.java
+++ b/src/soundtrap/STAcquisitionProcess.java
@@ -87,6 +87,12 @@ public class STAcquisitionProcess extends AcquisitionProcess {
 			}
 		}
 	}
+	
+	@Override
+	public float getSampleRate() {
+		float fs = super.getSampleRate();
+		return fs;
+	}
 
 	@Override
 	/**
@@ -150,6 +156,7 @@ public class STAcquisitionProcess extends AcquisitionProcess {
 	public boolean isStalled() {
 		return false;
 	}
+