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diff --git a/muse_qt4_evolution/awl/volslider.h b/muse_qt4_evolution/awl/volslider.h
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+//=============================================================================
+//  Awl
+//  Audio Widget Library
+//  $Id:$
+//
+//  Copyright (C) 2002-2006 by Werner Schweer and others
+//
+//  This program is free software; you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License version 2.
+//
+//  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, write to the Free Software
+//  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+//=============================================================================
+
+#ifndef __AWLVOLSLIDER_H__
+#define __AWLVOLSLIDER_H__
+
+#include "slider.h"
+
+namespace Awl {
+
+//---------------------------------------------------------
+//   VolSlider
+//!   Volume Slider entry widget
+//
+//!   This widget implements a slider with a logarithmic
+//!   floating point scale used to adjust the volume
+//!   in an audio mixer.
+//!   Internal value represents gain as a logarythmic
+//!   dB value.
+//---------------------------------------------------------
+
+class VolSlider : public Slider {
+      Q_OBJECT
+
+   protected:
+      virtual void mouseDoubleClickEvent(QMouseEvent*);
+
+   public slots:
+      virtual void setValue(double v);
+
+   public:
+      VolSlider(QWidget* parent = 0);
+
+      virtual double value() const;
+      };
+
+}
+
+#endif
+