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diff --git a/libs/vamp-pyin/MonoPitch.h b/libs/vamp-pyin/MonoPitch.h
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+++ b/libs/vamp-pyin/MonoPitch.h
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+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    pYIN - A fundamental frequency estimator for monophonic audio
+    Centre for Digital Music, Queen Mary, University of London.
+    
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License as
+    published by the Free Software Foundation; either version 2 of the
+    License, or (at your option) any later version.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+#ifndef _MONOPITCH_H_
+#define _MONOPITCH_H_
+
+#include "MonoPitchHMM.h"
+
+#include <iostream>
+#include <vector>
+#include <exception>
+
+using std::vector;
+using std::pair;
+
+class MonoPitch {
+public:
+    MonoPitch();
+    virtual ~MonoPitch();
+    
+    // pitchProb is a frame-wise vector carrying a vector of pitch-probability pairs
+    const vector<float> process(const vector<vector<pair<double, double> > > pitchProb);
+private:
+    MonoPitchHMM hmm;
+};
+
+#endif