diff --git a/libm65/genjtms3.f90 b/libm65/genjtms3.f90
index 315d95662..b5c889cb9 100644
--- a/libm65/genjtms3.f90
+++ b/libm65/genjtms3.f90
@@ -129,14 +129,14 @@ subroutine genjtms3(msg28,iwave,nwave)
   fac=32767.0/wmax
   iwave(1:nsam)=fac*wave(1:nsam)
 
-  nwave=nsam
+!  nwave=nsam
 
-!  nblk=30*48000/nsam
-!  do n=2,nblk
-!     i0=(n-1)*nsam
-!     iwave(i0+1:i0+nsam)=iwave(1:nsam)
-!  enddo
-!  nwave=i0+nsam
+  nblk=30*48000/nsam
+  do n=2,nblk
+     i0=(n-1)*nsam
+     iwave(i0+1:i0+nsam)=iwave(1:nsam)
+  enddo
+  nwave=i0+nsam
 
 ! Compute the spectrum
 !  nfft=nsam
diff --git a/libm65/makepings.f90 b/libm65/makepings.f90
new file mode 100644
index 000000000..eb96fa93e
--- /dev/null
+++ b/libm65/makepings.f90
@@ -0,0 +1,29 @@
+subroutine makepings(iwave,nwave)
+
+  parameter (NFSAMPLE=48000)
+  integer*2 iwave(nwave)
+  real*8 t
+
+  iping0=-999
+  dt=1.0/NFSAMPLE
+  do i=1,nwave
+     iping=i/(3*NFSAMPLE)
+     if(iping.ne.iping0) then
+        ip=mod(iping,3)
+        w=0.015*(4-ip)
+        ig=(iping-1)/3
+        amp=sqrt((3.0-ig)/3.0)
+        t0=dt*(iping+0.5)*(3*NFSAMPLE)
+        iping0=iping
+     endif
+     t=(i*dt-t0)/w
+     if(t.lt.0.d0 .and. t.lt.10.0) then
+        fac=0.
+     else
+        fac=2.718*t*dexp(-t)
+     endif
+     iwave(i)=nint(fac*amp*iwave(i))
+  enddo
+
+  return
+end subroutine makepings
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 0439019a9..aefb24c8e 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -1168,7 +1168,7 @@ void MainWindow::guiUpdate()
     ba2msg(ba,msgsent);
     int len1=28;
     genjtms3_(message,iwave,&nwave,len1);
-
+//    makepings_(iwave,&nwave);
     if(m_restart) {
       QFile f("jtms3_tx.log");
       f.open(QIODevice::WriteOnly | QIODevice::Text | QIODevice::Append);
diff --git a/mainwindow.h b/mainwindow.h
index a7c20248a..b4cf634e7 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -239,6 +239,8 @@ extern "C" {
 
   void genjtms3_(char* message, short iwave[], int* nwave, int len1);
 
+  void makepings_(short iwave[], int* nwave);
+
   void gen65_(char* msg, int* mode65, double* samfac, int* nsendingsh,
               char* msgsent, short iwave[], int* nwave, int len1, int len2);