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diff --git a/src/minphase_hrtfcont.hpp b/src/minphase_hrtfcont.hpp
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+/*
+    cw_binaural~: a binaural synthesis external for pure data
+    by David Doukhan - david.doukhan@gmail.com - http://www.limsi.fr/Individu/doukhan
+    and Anne Sedes - sedes.anne@gmail.com
+    Copyright (C) 2009-2011  David Doukhan and Anne Sedes
+
+    For more details, see CW_binaural~, a binaural synthesis external for Pure Data
+    David Doukhan and Anne Sedes, PDCON09
+
+
+    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 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+
+
+#ifndef MINPHASE_HRTFCONT_HPP_
+# define MINPHASE_HRTFCONT_HPP_
+
+# include "hrtfcont.hpp"
+
+// This class is used to store the minimal phase impulse response
+// of a give HRTF
+// These filters should be used in cunjunction with a pure delay
+class MinPhaseHrtfCont: public HrtfCont
+{
+public:
+  MinPhaseHrtfCont(const ir_key& k);
+private:
+  void magnitude(const float* src, float* dst, size_t n);
+  void im_hilbert(const float* src, float* dst, size_t n);
+  void minphase_ir(const float* src, float* dst, int n);
+};
+
+#endif