diff --git a/lib/Makefile.MinGW b/lib/Makefile.MinGW
index 0db7ac4c5..a8d028daa 100644
--- a/lib/Makefile.MinGW
+++ b/lib/Makefile.MinGW
@@ -50,7 +50,8 @@ OBJS1 = pctile.o graycode.o sort.o ssort.o \
 	filbig.o fil6521.o afc65b.o decode65b.o setup65.o \
 	extract.o fchisq65.o demod64a.o chkhist.o interleave63.o ccf2.o \
 	move.o indexx.o graycode65.o twkfreq65.o smo121.o \
-	wrapkarn.o init_rs.o encode_rs.o decode_rs.o gen65.o fil4.o
+	wrapkarn.o init_rs.o encode_rs.o decode_rs.o gen65.o fil4.o \
+	flat3.o polfit.o determ.o
 
 libjt9.a: $(OBJS1)
 	ar cr libjt9.a $(OBJS1) 
diff --git a/lib/Makefile.linux b/lib/Makefile.linux
index 697f6324d..884387a44 100644
--- a/lib/Makefile.linux
+++ b/lib/Makefile.linux
@@ -40,7 +40,8 @@ OBJS1 = pctile.o graycode.o sort.o ssort.o \
 	filbig.o fil6521.o afc65b.o decode65b.o setup65.o \
 	extract.o fchisq65.o demod64a.o chkhist.o interleave63.o ccf2.o \
 	move.o indexx.o graycode65.o twkfreq65.o smo121.o \
-	wrapkarn.o init_rs.o encode_rs.o decode_rs.o gen65.o fil4.o
+	wrapkarn.o init_rs.o encode_rs.o decode_rs.o gen65.o fil4.o \
+	flat3.o polfit.o determ.o
 
 libjt9.a: $(OBJS1)
 	ar cr libjt9.a $(OBJS1) 
diff --git a/lib/flat3.f90 b/lib/flat3.f90
index 75562268d..5ca2ae9ee 100644
--- a/lib/flat3.f90
+++ b/lib/flat3.f90
@@ -67,7 +67,7 @@ subroutine flat3(s0,iz,nfa,nfb,nterms,ynoise,s)
 !  enddo
 
   do i=1,ib
-     y4=y0(i)-yfit(i) - 20.0
+     y4=y0(i)-yfit(i) - 10.0
      s(i)=10.0**(0.1*y4)
   enddo
 
diff --git a/lib/symspec.f90 b/lib/symspec.f90
index bcd240aba..3a85f2a10 100644
--- a/lib/symspec.f90
+++ b/lib/symspec.f90
@@ -41,7 +41,7 @@ subroutine symspec(k,ntrperiod,nsps,ingain,slope,pxdb,s,df3,ihsym,npts8)
      go to 900                                 !Wait for enough samples to start
   endif
 
-  if(nfft3.ne.nfft3z .or. (slope.ne.slope0 .and. abs(slope+0.1).gt.0.05)) then
+  if(nfft3.ne.nfft3z .or. slope.ne.slope0) then
 ! Compute new window and adjust scale factor
      pi=4.0*atan(1.0)
      do i=1,nfft3
@@ -49,10 +49,14 @@ subroutine symspec(k,ntrperiod,nsps,ingain,slope,pxdb,s,df3,ihsym,npts8)
      enddo
      nfft3z=nfft3
      nh=NSMAX/2
-     do i=1,NSMAX
-        x=slope*float(i)/nh - 1.0 + 2.6
-        scale(i)=10.0**x
-     enddo
+     if(abs(slope+0.1).gt.0.05) then
+        do i=1,NSMAX
+           x=slope*float(i)/nh - 1.0 + 2.6
+           scale(i)=10.0**x
+        enddo
+     else
+        scale=1.0
+     endif
      slope0=slope
   endif
 
@@ -110,7 +114,8 @@ subroutine symspec(k,ntrperiod,nsps,ingain,slope,pxdb,s,df3,ihsym,npts8)
 
   if(abs(slope+0.1).lt.0.01) then
      call flat3(s,iz,nfa,nfb,3,1.0,s)
-!     call flat3(savg,iz,3,1.0,savg)
+     call flat3(savg,iz,nfa,nfb,3,1.0,savg)
+     savg=7.0*savg
   endif
 
 900 npts8=k/8
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 707aed805..d5b646854 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -1,4 +1,4 @@
-//--------------------------------------------------------------- MainWindow
+//-------------------------------------------------------------- MainWindow
 #include "mainwindow.h"
 #include "ui_mainwindow.h"
 
diff --git a/soundout.cpp b/soundout.cpp
index cf0309a4f..cc14fe8e2 100644
--- a/soundout.cpp
+++ b/soundout.cpp
@@ -17,31 +17,30 @@ bool SoundOutput::audioError () const
   bool result (true);
 
   Q_ASSERT_X (m_stream, "SoundOutput", "programming error");
-  if (m_stream)
+  if (m_stream) {
+    switch (m_stream->error ())
     {
-      switch (m_stream->error ())
-	{
-	case QAudio::OpenError:
-	  Q_EMIT error (tr ("An error opening the audio output device has occurred."));
-	  break;
+    case QAudio::OpenError:
+      Q_EMIT error (tr ("An error opening the audio output device has occurred."));
+      break;
 
-	case QAudio::IOError:
-	  Q_EMIT error (tr ("An error occurred during write to the audio output device."));
-	  break;
+    case QAudio::IOError:
+      Q_EMIT error (tr ("An error occurred during write to the audio output device."));
+      break;
 
-	case QAudio::UnderrunError:
-	  Q_EMIT error (tr ("Audio data not being fed to the audio output device fast enough."));
-	  break;
+    case QAudio::UnderrunError:
+      Q_EMIT error (tr ("Audio data not being fed to the audio output device fast enough."));
+      break;
 
-	case QAudio::FatalError:
-	  Q_EMIT error (tr ("Non-recoverable error, audio output device not usable at this time."));
-	  break;
+    case QAudio::FatalError:
+      Q_EMIT error (tr ("Non-recoverable error, audio output device not usable at this time."));
+      break;
 
-	case QAudio::NoError:
-	  result = false;
-	  break;
-	}
+    case QAudio::NoError:
+      result = false;
+      break;
     }
+  }
   return result;
 }