diff --git a/src/Acquisition/FolderInputSystem.java b/src/Acquisition/FolderInputSystem.java
index 731c3439..3eed96ec 100644
--- a/src/Acquisition/FolderInputSystem.java
+++ b/src/Acquisition/FolderInputSystem.java
@@ -861,7 +861,19 @@ public class FolderInputSystem extends FileInputSystem implements PamSettings, D
 			long[] allFileStarts = new long[allFiles.size()];
 			for (int i = 0; i < allFiles.size(); i++) {
 				allFileStarts[i] = getFileStartTime(allFiles.get(i).getAbsoluteFile());
+				if (allFileStarts[i] < firstFileStart) {
+//					System.out.printf("Swap first file from %s to %s\n", firstFile.getName(), allFiles.get(i).getName());
+					firstFile = allFiles.get(i);
+					firstFileStart = allFileStarts[i];
+				}
+				if (allFileStarts[i] > lastFileEnd) {
+//					System.out.printf("Swap last file from %s to %s\n", lastFile.getName(), allFiles.get(i).getName());
+					lastFile = allFiles.get(i);
+					lastFileEnd = allFileStarts[i] + (long) (lastFile.getDurationInSeconds()*1000.);
+				}
 			}
+			storeInfo.setFirstFileStart(firstFileStart); // just incase changed. 
+			storeInfo.setLastFileEnd(lastFileEnd); // just incase changed
 			storeInfo.setFileStartTimes(allFileStarts);
 		}
 		return storeInfo;
diff --git a/src/PamController/InputStoreInfo.java b/src/PamController/InputStoreInfo.java
index 265ed9d2..cde04c8c 100644
--- a/src/PamController/InputStoreInfo.java
+++ b/src/PamController/InputStoreInfo.java
@@ -75,6 +75,27 @@ public class InputStoreInfo {
 	public long[] getFileStartTimes() {
 		return fileStartTimes;
 	}
+
+	/**
+	 * @param firstFileStart the firstFileStart to set
+	 */
+	public void setFirstFileStart(long firstFileStart) {
+		this.firstFileStart = firstFileStart;
+	}
+
+	/**
+	 * @param lastFileStart the lastFileStart to set
+	 */
+	public void setLastFileStart(long lastFileStart) {
+		this.lastFileStart = lastFileStart;
+	}
+
+	/**
+	 * @param lastFileEnd the lastFileEnd to set
+	 */
+	public void setLastFileEnd(long lastFileEnd) {
+		this.lastFileEnd = lastFileEnd;
+	}