diff --git a/src/main/java/io/github/dsheirer/dsp/psk/InterpolatingSampleBuffer.java b/src/main/java/io/github/dsheirer/dsp/psk/InterpolatingSampleBuffer.java
index 196fa6a4..6d52579c 100644
--- a/src/main/java/io/github/dsheirer/dsp/psk/InterpolatingSampleBuffer.java
+++ b/src/main/java/io/github/dsheirer/dsp/psk/InterpolatingSampleBuffer.java
@@ -1,23 +1,20 @@
 /*
+ * *****************************************************************************
+ * Copyright (C) 2014-2022 Dennis Sheirer
  *
- *  * ******************************************************************************
- *  * Copyright (C) 2014-2019 Dennis Sheirer
- *  *
- *  * This program is free software: you can redistribute it and/or modify
- *  * it under the terms of the GNU General Public License as published by
- *  * the Free Software Foundation, either version 3 of the License, or
- *  * (at your option) any later version.
- *  *
- *  * This program is distributed in the hope that it will be useful,
- *  * but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  * GNU General Public License for more details.
- *  *
- *  * You should have received a copy of the GNU General Public License
- *  * along with this program.  If not, see <http://www.gnu.org/licenses/>
- *  * *****************************************************************************
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
  *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
  *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ * ****************************************************************************
  */
 package io.github.dsheirer.dsp.psk;
 
@@ -185,7 +182,11 @@ public class InterpolatingSampleBuffer
      */
     public float getInphase(float interpolation)
     {
-        if(interpolation < 1.0f)
+        if(interpolation < 0.0f)
+        {
+            return mInterpolator.filter(mDelayLineInphase, mDelayLinePointer, 0.0f);
+        }
+        else if(interpolation < 1.0f)
         {
             return mInterpolator.filter(mDelayLineInphase, mDelayLinePointer, interpolation);
         }
@@ -203,7 +204,11 @@ public class InterpolatingSampleBuffer
      */
     public float getQuadrature(float interpolation)
     {
-        if(interpolation < 1.0f)
+        if(interpolation < 0.0f)
+        {
+            return mInterpolator.filter(mDelayLineQuadrature, mDelayLinePointer, 0.0f);
+        }
+        else if(interpolation < 1.0f)
         {
             return mInterpolator.filter(mDelayLineQuadrature, mDelayLinePointer, interpolation);
         }