diff --git a/lib/symspec.f90 b/lib/symspec.f90
index 3f9279742..3dcd0f150 100644
--- a/lib/symspec.f90
+++ b/lib/symspec.f90
@@ -137,8 +137,8 @@ subroutine symspec(k,ntrperiod,nsps,ndiskdat,nb,nbslider,pxdb,s,f0a,df3,    &
   endif
 
 999 continue
-!  write(71,*) ja,npts8,ja,ja+nfft3,px,rms,pxdb
-!3003 format(5i9,3f11.0)
+!  write(71,3003) k,nsps,ihsym,nfft3,pxdb,df3,s(250)
+!3003 format(4i9,3f11.3)
 !   flush(71)
 
   return
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 0c85fe590..df534c282 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -1,4 +1,4 @@
-//------------------------------------------------------------- MainWindow
+//-------------------------------------------------------------- MainWindow
 #include "mainwindow.h"
 #include "ui_mainwindow.h"
 #include "devsetup.h"
@@ -327,6 +327,7 @@ void MainWindow::dataSink(int k)
   trmin=m_TRperiod/60;
   symspec_(&k, &trmin, &m_nsps, &ndiskdat, &nb, &m_NBslider, &px, s,
            &f0a, &df3, &ihsym, &nzap, &slimit, lstrong);
+//  qDebug() << "a" << k << m_nsps << ihsym << px << df3 << s[250];
   if(ihsym <=0) return;
   QString t;
   m_pctZap=nzap/178.3;
diff --git a/soundin.cpp b/soundin.cpp
index 7e6cc7ff8..30d9b230e 100644
--- a/soundin.cpp
+++ b/soundin.cpp
@@ -121,6 +121,7 @@ void SoundInThread::run()                           //SoundInThread::run()
   int ntr;
   int nBusy=0;
   int nstep0=0;
+  int nsps0=0;
 
 //---------------------------------------------- Soundcard input loop
   while (!qe) {
@@ -131,8 +132,9 @@ void SoundInThread::run()                           //SoundInThread::run()
     ntr = nsec % m_TRperiod;
 
 // Reset buffer pointer and symbol number at start of minute
-    if(ntr < ntr0 or !m_monitoring) {
+    if(ntr < ntr0 or !m_monitoring or m_nsps!=nsps0) {
       nstep0=0;
+      nsps0=m_nsps;
       udata.bzero=true;
     }
     k=udata.kin;