diff --git a/jt9decode.cpp b/jt9decode.cpp
new file mode 100644
index 000000000..fe340134d
--- /dev/null
+++ b/jt9decode.cpp
@@ -0,0 +1,6 @@
+#include "jt9decode.h"
+
+void JT9DecodeThread::run()
+{
+  qDebug() << "Decode Thread started";
+}
diff --git a/jt9decode.h b/jt9decode.h
new file mode 100644
index 000000000..638f8a7bd
--- /dev/null
+++ b/jt9decode.h
@@ -0,0 +1,29 @@
+#ifndef JT9DECODE_H
+#define JT9DECODE_H
+#include <QtCore>
+#include <QDebug>
+
+class JT9DecodeThread : public QThread
+{
+  Q_OBJECT
+
+protected:
+  virtual void run();
+
+public:
+// Constructs (but does not start) a JT9DecodeThread
+  JT9DecodeThread()
+    :   quitExecution(false)           // Initialize some private members
+    ,   m_txOK(false)
+  {
+  }
+
+public:
+  bool quitExecution;           //If true, thread exits gracefully
+
+// Private members
+private:
+  bool    m_txOK;               //Enable Tx audio
+};
+
+#endif // JT9DECODE_H
diff --git a/lib/sync9.f90 b/lib/sync9.f90
index b5424522b..30a813919 100644
--- a/lib/sync9.f90
+++ b/lib/sync9.f90
@@ -23,7 +23,7 @@ subroutine sync9(ss,tstep,f0a,df3,ntol,nfqso,sync,fpk,ccfred)
      if(ia.lt.1) ia=1
      if(ib.gt.NSMAX) ib=NSMAX
   endif
-  print*,ia,ib,df3*ia+1000,df3*ib+1000
+  print*,ia,ib,f0a,df3,ntol,nfqso,df3*ia+1000,df3*ib+1000
 
   sbest=0.
   lagmax=2.5/tstep + 0.9999
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 43ac2d8e7..987bee00f 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -143,6 +143,10 @@ MainWindow::MainWindow(QWidget *parent) :
   watcher2 = new QFutureWatcher<void>;
   connect(watcher2, SIGNAL(finished()),this,SLOT(diskWriteFinished()));
 
+  future3 = new QFuture<void>;
+  watcher3 = new QFutureWatcher<void>;
+  connect(watcher3, SIGNAL(finished()),this,SLOT(decoderFinished()));
+
 // Assign input device and start input thread
   soundInThread.setInputDevice(m_paInDevice);
   soundInThread.start(QThread::HighestPriority);
@@ -732,7 +736,13 @@ void MainWindow::diskWriteFinished()                       //diskWriteFinished
 {
   qDebug() << "diskWriteFinished";
 }
-                                                        //Delete ../save/*.wav
+
+void MainWindow::decoderFinished()                       //decoderFinished
+{
+  qDebug() << "Decoder Finished";
+}
+
+//Delete ../save/*.wav
 void MainWindow::on_actionDelete_all_wav_files_in_SaveDir_triggered()
 {
   int i;
@@ -804,7 +814,7 @@ void MainWindow::on_actionAvailable_suffixes_and_add_on_prefixes_triggered()
 
 void MainWindow::on_DecodeButton_clicked()                    //Decode request
 {
-  qDebug() << "A" << g_pWideGraph->QSOfreq() << m_tol;
+  decode();
 }
 
 void MainWindow::freezeDecode(int n)                          //freezeDecode()
@@ -814,7 +824,10 @@ void MainWindow::freezeDecode(int n)                          //freezeDecode()
 
 void MainWindow::decode()                                       //decode()
 {
+//  jt9DecodeThread.start(QThread::NormalPriority);
 
+  *future3 = QtConcurrent::run(decoder_, &m_TRperiod);
+  watcher3->setFuture(*future2);
 }
 
 
@@ -1391,4 +1404,3 @@ void MainWindow::on_TxFreqSpinBox_valueChanged(int n)
   m_txFreq=n;
   soundOutThread.setTxFreq(n);
 }
-
diff --git a/mainwindow.h b/mainwindow.h
index 655d6d355..ebdf1e963 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -7,6 +7,7 @@
 #include <QHash>
 #include "soundin.h"
 #include "soundout.h"
+#include "jt9decode.h"
 #include "commons.h"
 #include "sleep.h"
 
@@ -32,6 +33,7 @@ public slots:
   void dataSink(int k);
   void diskDat();
   void diskWriteFinished();
+  void decoderFinished();
   void freezeDecode(int n);
   void guiUpdate();
   void doubleClickOnCall(QString hiscall, bool ctrl);
@@ -166,8 +168,10 @@ private:
 
     QFuture<void>* future1;
     QFuture<void>* future2;
+    QFuture<void>* future3;
     QFutureWatcher<void>* watcher1;
     QFutureWatcher<void>* watcher2;
+    QFutureWatcher<void>* watcher3;
 
     QProcess proc_m65;
 
@@ -188,6 +192,7 @@ private:
 
     SoundInThread soundInThread;             //Instantiate the audio threads
     SoundOutThread soundOutThread;
+    JT9DecodeThread jt9DecodeThread;
 
 //---------------------------------------------------- private functions
     void readSettings();
@@ -215,8 +220,12 @@ void symspec_(int* k, int* ntrperiod, int* nsps, int* ndiskdat,
               int* nb, int* m_NBslider, float* px, float s[], float red[],
               float* f0a, float* df3, int* nhsym, int* nzap,
                float* slimit, uchar lstrong[]);
+
 void genjt9_(char* msg, int* minutes, char* msgsent, int itone[],
              int len1, int len2);
+
+void decoder_(int* ntrperiod);
+
 int ptt_(int* nport, int* itx, int* iptt);
   }
 
diff --git a/wsjtx.pro b/wsjtx.pro
index 0f927fbb5..7c52b1918 100644
--- a/wsjtx.pro
+++ b/wsjtx.pro
@@ -6,7 +6,7 @@
 
 QT       += core gui network
 CONFIG   += qwt thread
-#CONFIG   += console
+CONFIG   += console
 
 TARGET = wsjtx
 VERSION = 0.2
@@ -35,7 +35,8 @@ QMAKE_EXTRA_COMPILERS += gfortran
 SOURCES += main.cpp mainwindow.cpp plotter.cpp about.cpp \
     soundin.cpp soundout.cpp devsetup.cpp \
     widegraph.cpp getfile.cpp \
-    displaytext.cpp getdev.cpp
+    displaytext.cpp getdev.cpp \
+    jt9decode.cpp
 
 win32 {
 SOURCES += killbyname.cpp
@@ -44,6 +45,7 @@ SOURCES += killbyname.cpp
 HEADERS  += mainwindow.h plotter.h soundin.h soundout.h \
             about.h devsetup.h widegraph.h getfile.h \
             commons.h sleep.h displaytext.h \
+    jt9decode.h
 
 DEFINES += __cplusplus