diff --git a/WSJT-X_Quick_Start_Guide.docx b/WSJT-X_Quick_Start_Guide.docx
index b3ed855ea..0dddcbc18 100644
Binary files a/WSJT-X_Quick_Start_Guide.docx and b/WSJT-X_Quick_Start_Guide.docx differ
diff --git a/getfile.cpp b/getfile.cpp
index 9468832a6..67f419546 100644
--- a/getfile.cpp
+++ b/getfile.cpp
@@ -3,6 +3,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <math.h>
+#include <windows.h>
 
 void getfile(QString fname, int ntrperiod)
 {
@@ -114,3 +115,49 @@ float gran()
   iset++;
   return v2*fac;
 }
+
+int ptt(int nport, int ntx, int *iptt)
+{
+  static HANDLE hFile;
+  static int open=0;
+  char s[10];
+  int i3=1,i4=1,i5=1,i6=1,i9=1,i00=1;
+
+  if(nport==0) {
+    *iptt=ntx;
+    return(0);
+  }
+
+  if(ntx && (!open)) {
+    sprintf(s,"COM%d",nport);
+    hFile=CreateFile(TEXT(s),GENERIC_WRITE,0,NULL,OPEN_EXISTING,
+                     FILE_ATTRIBUTE_NORMAL,NULL);
+    if(hFile==INVALID_HANDLE_VALUE) {
+      //      printf("PTT: Cannot open COM port %d.\n",nport);
+      return 1;
+    }
+    open=1;
+  }
+
+  if(ntx && open) {
+    i3=EscapeCommFunction(hFile,SETRTS);
+    i5=EscapeCommFunction(hFile,SETDTR);
+    *iptt=1;
+  }
+
+  else {
+    i4=EscapeCommFunction(hFile,CLRRTS);
+    i6=EscapeCommFunction(hFile,CLRDTR);
+    i9=EscapeCommFunction(hFile,CLRBREAK);
+    i00=CloseHandle(hFile);
+    *iptt=0;
+    open=0;
+  }
+  if(i3==0) return -(SETRTS);
+  if(i4==0) return -(CLRRTS);
+  if(i5==0) return -(SETDTR);
+  if(i6==0) return -(CLRDTR);
+  if(i9==0) return -(CLRBREAK);
+  if(i00==0) return -10;
+  return 0;
+}
diff --git a/getfile.h b/getfile.h
index 7c6d8e629..38283538d 100644
--- a/getfile.h
+++ b/getfile.h
@@ -8,5 +8,6 @@
 void getfile(QString fname, int ntrperiod);
 void savetf2(QString fname, int ntrperiod);
 float gran();
+int ptt(int* nport, int* ntx, int* iptt);
 
 #endif // GETFILE_H
diff --git a/lib/ptt.c b/lib/ptt.c
index d0ee0cb1e..c03054ba1 100644
--- a/lib/ptt.c
+++ b/lib/ptt.c
@@ -25,18 +25,24 @@ int ptt_(int *nport, int *ntx, int *iptt)
   }
 
   if(*ntx && open) {
-    EscapeCommFunction(hFile,3);
-    EscapeCommFunction(hFile,5);
+    i3=EscapeCommFunction(hFile,3);
+    i5=EscapeCommFunction(hFile,5);
     *iptt=1;
   }
 
   else {
-    EscapeCommFunction(hFile,4);
-    EscapeCommFunction(hFile,6);
-    EscapeCommFunction(hFile,9);
+    i4=EscapeCommFunction(hFile,4);
+    i6=EscapeCommFunction(hFile,6);
+    i9=EscapeCommFunction(hFile,9);
     i00=CloseHandle(hFile);
     *iptt=0;
     open=0;
   }
+  if(i3==0) return 3;
+  if(i4==0) return 4;
+  if(i5==0) return 5;
+  if(i6==0) return 6;
+  if(i9==0) return 9;
+  if(i00==0) return 10;
   return 0;
 }
diff --git a/mainwindow.cpp b/mainwindow.cpp
index f11e756ed..08a10b7da 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -6,6 +6,7 @@
 #include "about.h"
 #include "widegraph.h"
 #include "sleep.h"
+#include "getfile.h"
 #include <portaudio.h>
 
 int itone[85];                        //Tx audio tones for 85 symbols
@@ -914,11 +915,11 @@ void MainWindow::guiUpdate()
 
     if(bTxTime and iptt==0 and !m_txMute) {
       int itx=1;
-      int ierr = ptt_(&m_pttPort,&itx,&iptt);       // Raise PTT
-      if(ierr != 0) {
+      int ierr = ptt(m_pttPort,itx,&iptt);       // Raise PTT
+      if(ierr<0) {
         on_stopTxButton_clicked();
         char s[18];
-        sprintf(s,"Cannot open COM%d",m_pttPort);
+        sprintf(s,"PTT Error %d",ierr);
         msgBox(s);
       }
       if(!soundOutThread.isRunning()) {
@@ -985,7 +986,12 @@ void MainWindow::guiUpdate()
   if(nc0 <= 0) nc0++;
   if(nc0 == 0) {
     int itx=0;
-    ptt_(&m_pttPort,&itx,&iptt);       // Lower PTT
+    int ierr=ptt(m_pttPort,itx,&iptt);       // Lower PTT
+    if(ierr<0) {
+      char s[18];
+      sprintf(s,"PTT Error %d",ierr);
+      msgBox(s);
+    }
     if(!m_txMute) soundOutThread.quitExecution=true;
     m_transmitting=false;
     if(m_auto) {
diff --git a/mainwindow.h b/mainwindow.h
index e6cfe90d0..08504a1f1 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -216,6 +216,8 @@ extern int killbyname(const char* progName);
 extern void getDev(int* numDevices,char hostAPI_DeviceName[][50],
                    int minChan[], int maxChan[],
                    int minSpeed[], int maxSpeed[]);
+extern int ptt(int nport, int itx, int* iptt);
+
 
 extern "C" {
 //----------------------------------------------------- C and Fortran routines
@@ -227,8 +229,6 @@ void symspec_(int* k, int* ntrperiod, int* nsps, int* nb, int* m_NBslider,
 void genjt9_(char* msg, char* msgsent, int itone[], int len1, int len2);
 
 void decoder_(int* ntrperiod, int* mRxLog, float c0[]);
-
-int ptt_(int* nport, int* itx, int* iptt);
-  }
+}
 
 #endif // MAINWINDOW_H
diff --git a/soundout.cpp b/soundout.cpp
index c1b2a4285..9a0734ea8 100644
--- a/soundout.cpp
+++ b/soundout.cpp
@@ -32,14 +32,16 @@ extern "C" int d2aCallback(const void *inputBuffer, void *outputBuffer,
   short *wptr = (short*)outputBuffer;
 
   static double twopi=2.0*3.141592653589793238462;
-  static double baud=12000.0/udata->nsps;
+  static double baud;
   static double phi=0.0;
   static double dphi;
   static double freq;
   static double snr;
   static double fac;
   static int ic=0;
+  static int isym0=-99;
   static short int i2;
+  int isym;
 
   if(udata->bRestart) {
  // Time according to this computer
@@ -49,8 +51,9 @@ extern "C" int d2aCallback(const void *inputBuffer, void *outputBuffer,
     ic=(mstr-1000)*12;
     udata->bRestart=false;
   }
-  int isym=ic/udata->nsps;
+  isym=ic/udata->nsps;
   if(isym>=85) return 0;
+  baud=12000.0/udata->nsps;
   freq=udata->ntxfreq + itone[isym]*baud;
   dphi=twopi*freq/12000.0;
   if(udata->txsnrdb < 0.0) {