diff --git a/Detector.cpp b/Detector.cpp
index 4974a25..751cdf2 100644
--- a/Detector.cpp
+++ b/Detector.cpp
@@ -51,8 +51,13 @@ void Detector::clear ()
   dec_data.params.kin = qMin ((msInPeriod * m_frameRate) / 1000, static_cast<unsigned> (sizeof (dec_data.d2) / sizeof (dec_data.d2[0])));
   m_bufferPos = m_samplesPerFFT;
 
+#if 0
   // erase everything after kin.
-  memset(dec_data.d2 + dec_data.params.kin, 0, sizeof(dec_data.d2) - (sizeof(dec_data.d2[0]) * dec_data.params.kin));
+  //memset(dec_data.d2 + dec_data.params.kin, 0, sizeof(dec_data.d2) - (sizeof(dec_data.d2[0]) * dec_data.params.kin));
+#else
+  // erase everything
+  memset(dec_data.d2, 0, sizeof(dec_data.d2) - (sizeof(dec_data.d2[0])));
+#endif
 
   qDebug() << "advancing detector buffer from" << prevKin << "to" << dec_data.params.kin << "delta" << dec_data.params.kin - prevKin;
 #else