diff --git a/include/BPMDetect.h b/include/BPMDetect.h
index c5989cf..848a12b 100644
--- a/include/BPMDetect.h
+++ b/include/BPMDetect.h
@@ -83,15 +83,6 @@ protected:
     /// RMS volume sliding average approximation level accumulator
     double RMSVolumeAccu;
 
-    /// Level below which to cut off signals
-    double cutCoeff;
-
-    /// Accumulator for accounting what proportion of samples exceed cutCoeff level
-    double aboveCutAccu;
-
-    /// Accumulator for total samples to calculate proportion of samples that exceed cutCoeff level
-    double totalAccu;
-
     /// Sample average counter.
     int decimateCount;
 
@@ -137,6 +128,9 @@ protected:
                       int numsamples                    ///< Number of samples in buffer
                       );
 
+    /// remove constant bias from xcorr data
+    void removeBias();
+
 public:
     /// Constructor.
     BPMDetect(int numChannels,  ///< Number of channels in sample data.