diff --git a/sound/recorder/MainWindow.xaml.cs b/sound/recorder/MainWindow.xaml.cs
index 515d31e44..df5d7976d 100644
--- a/sound/recorder/MainWindow.xaml.cs
+++ b/sound/recorder/MainWindow.xaml.cs
@@ -214,7 +214,7 @@ namespace OpenTXrecorder
         private void DataArrived(IntPtr data, int size)
         {
             Marshal.Copy(data, recordingBuffer, 0, size);
-            filewriter.Write(recordingBuffer);
+            filewriter.Write(recordingBuffer, size);
         }
     }
 
diff --git a/sound/recorder/WaveIn.cs b/sound/recorder/WaveIn.cs
index 2a7fc12c6..449cae4ad 100644
--- a/sound/recorder/WaveIn.cs
+++ b/sound/recorder/WaveIn.cs
@@ -119,10 +119,10 @@ namespace WaveLib
             filewriter.Write((uint)0); // chunkisize (filled in when we close)
         }
 
-        public void Write(byte[] data)
+        public void Write(byte[] data, int size)
         {
-            filewriter.Write(data);
-            audiobyteswritten += data.Length;
+            filewriter.Write(data, 0, size);
+            audiobyteswritten += size;
         }
 
         public void Close()
diff --git a/sound/recorder/clsWaveProcessor.cs b/sound/recorder/clsWaveProcessor.cs
index b03c2065a..da815f5a9 100644
--- a/sound/recorder/clsWaveProcessor.cs
+++ b/sound/recorder/clsWaveProcessor.cs
@@ -72,12 +72,11 @@ public class wavProcessor
         for (int ni = 0, m = startpos; m <= endpos; m++, ni++)
             newarr[ni] = arrfile[m];
 
-        //write file
+        // write file back
         waout.DataLength = newarr.Length;
-
-        WavFileWriter wfWriter = new WavFileWriter(@strPath, wain.SampleRate, wain.BitsPerSample, wain.Channels);
-        wfWriter.Write(newarr);
-        wfWriter.Close();
+        WavFileWriter writer = new WavFileWriter(@strPath, wain.SampleRate, wain.BitsPerSample, wain.Channels);
+        writer.Write(newarr, newarr.Length);
+        writer.Close();
 
         return true;
     }