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diff --git a/muse_qt4_evolution/synti/zynaddsubfx/Synth/Envelope.h b/muse_qt4_evolution/synti/zynaddsubfx/Synth/Envelope.h
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+++ b/muse_qt4_evolution/synti/zynaddsubfx/Synth/Envelope.h
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+/*
+  ZynAddSubFX - a software synthesizer
+ 
+  Envelope.h - Envelope implementation
+  Copyright (C) 2002-2005 Nasca Octavian Paul
+  Author: Nasca Octavian Paul
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of version 2 of the GNU General Public License 
+  as published by the Free Software Foundation.
+
+  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 (version 2) for more details.
+
+  You should have received a copy of the GNU General Public License (version 2)
+  along with this program; if not, write to the Free Software Foundation,
+  Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
+
+*/
+
+#ifndef ENVELOPE_H
+#define ENVELOPE_H
+
+#include <math.h>
+#include "../globals.h"
+#include "../Params/EnvelopeParams.h"
+
+class Envelope{
+public:
+    Envelope(EnvelopeParams *envpars,REALTYPE basefreq);
+    ~Envelope();
+    void relasekey();
+    REALTYPE envout();
+    REALTYPE envout_dB();
+    int finished();//returns 1 if the envelope is finished
+private:
+    int envpoints;
+    int envsustain;//"-1" means disabled
+    REALTYPE envdt[MAX_ENVELOPE_POINTS];//millisecons
+    REALTYPE envval[MAX_ENVELOPE_POINTS];// [0.0 .. 1.0]
+    REALTYPE envstretch; 
+    int linearenvelope;
+
+    int currentpoint; //current envelope point (starts from 1)
+    int forcedrelase;
+    char keyreleased; //if the key was released 
+    char envfinish;    
+    REALTYPE t;   // the time from the last point
+    REALTYPE inct;// the time increment 
+    REALTYPE envoutval;//used to do the forced release
+};
+
+
+#endif
+
+