diff --git a/src/main/java/io/github/dsheirer/dsp/filter/design/FilterViewer.java b/src/main/java/io/github/dsheirer/dsp/filter/design/FilterViewer.java
index c6bbb29f..242d0c5e 100644
--- a/src/main/java/io/github/dsheirer/dsp/filter/design/FilterViewer.java
+++ b/src/main/java/io/github/dsheirer/dsp/filter/design/FilterViewer.java
@@ -1,15 +1,13 @@
 package io.github.dsheirer.dsp.filter.design;
 
+import io.github.dsheirer.dsp.filter.FilterFactory;
 import io.github.dsheirer.dsp.filter.fir.FIRFilterSpecification;
-import io.github.dsheirer.dsp.filter.fir.remez.RemezFIRFilterDesigner;
 import javafx.application.Application;
 import javafx.scene.Scene;
 import javafx.stage.Stage;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.util.Arrays;
-
 public class FilterViewer extends Application
 {
     private final static Logger mLog = LoggerFactory.getLogger(FilterViewer.class);
@@ -41,27 +39,16 @@ public class FilterViewer extends Application
      */
     private float[] getFilter()
     {
-        FIRFilterSpecification specification = FIRFilterSpecification.lowPassBuilder()
-            .sampleRate(25000)
-            .gridDensity(16)
-            .passBandCutoff(6000)
-            .passBandAmplitude(1.0)
-            .passBandRipple(0.01)
-            .stopBandStart(6700)
-            .stopBandAmplitude(0.0)
-            .stopBandRipple(0.03)
-            .build();
-
 //        FIRFilterSpecification specification = FIRFilterSpecification.lowPassBuilder()
-//            .sampleRate(100)
+//            .sampleRate(8000)
 //            .gridDensity(16)
 //            .oddLength(true)
-//            .passBandCutoff(21)
+//            .passBandCutoff(300)
 //            .passBandAmplitude(1.0)
 //            .passBandRipple(0.01)
-//            .stopBandStart(29)
+//            .stopBandStart(500)
 //            .stopBandAmplitude(0.0)
-//            .stopBandRipple(0.01)
+//            .stopBandRipple(0.03) //Approximately 60 dB attenuation
 //            .build();
 //
 //        FIRFilterSpecification specification = FIRFilterSpecification.highPassBuilder()
@@ -74,15 +61,15 @@ public class FilterViewer extends Application
 //            .passBandRipple(0.01)
 //            .build();
 
-//        FIRFilterSpecification specification = FIRFilterSpecification.bandPassBuilder()
-//            .sampleRate(8000)
-//            .stopFrequency1(1000)
-//            .passFrequencyBegin(1100)
-//            .passFrequencyEnd(1900)
-//            .stopFrequency2(2000)
-//            .stopRipple(0.000001)
-//            .passRipple(0.00001)
-//            .build();
+        FIRFilterSpecification specification = FIRFilterSpecification.bandPassBuilder()
+            .sampleRate(8000)
+            .stopFrequency1(1000)
+            .passFrequencyBegin(1100)
+            .passFrequencyEnd(1900)
+            .stopFrequency2(2000)
+            .stopRipple(0.000001)
+            .passRipple(0.00001)
+            .build();
 
         float[] taps = null;
 
@@ -96,38 +83,37 @@ public class FilterViewer extends Application
 //            mLog.error("Error");
 //        }
 
-        try
-        {
-            RemezFIRFilterDesigner designer = new RemezFIRFilterDesigner(specification);
-
-            if(designer.isValid())
-            {
-                taps = designer.getImpulseResponse();
-            }
-        }
-        catch(FilterDesignException fde)
-        {
-            mLog.error("Filter design error", fde);
-        }
-
-        if(taps == null)
-        {
-            throw new IllegalStateException("Couldn't design filter");
-        }
-
 //        try
 //        {
-//            taps = FilterFactory.getSincM2Synthesizer(0.25, 2, 9);
-//            taps = FilterFactory.getSincM2Channelizer(12500.0, 2, 9, true);
-//            taps = FilterFactory.getSincM2Synthesizer( 25000.0, 12500.0, 2, 9);
+//            RemezFIRFilterDesigner designer = new RemezFIRFilterDesigner(specification);
 //
+//            if(designer.isValid())
+//            {
+//                taps = designer.getImpulseResponse();
+//            }
 //        }
-//        catch(FilterDesignException e)
+//        catch(FilterDesignException fde)
 //        {
-//            e.printStackTrace();
+//            mLog.error("Filter design error", fde);
+//        }
+//
+//        if(taps == null)
+//        {
+//            throw new IllegalStateException("Couldn't design filter");
 //        }
 
-        mLog.debug(Arrays.toString(taps));
+        try
+        {
+//            taps = FilterFactory.getSincM2Synthesizer(0.25, 2, 9);
+//            taps = FilterFactory.getSincM2Channelizer(12500.0, 2, 9, true);
+            taps = FilterFactory.getSincM2Synthesizer( 25000.0, 12500.0, 2, 9);
+
+        }
+        catch(FilterDesignException e)
+        {
+            e.printStackTrace();
+        }
+
         return taps;
     }
 }