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diff --git a/src/base/AudioDevice.h b/src/base/AudioDevice.h
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+++ b/src/base/AudioDevice.h
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+// -*- c-basic-offset: 4 -*-
+
+/*
+    Rosegarden
+    A sequencer and musical notation editor.
+
+    This program is Copyright 2000-2008
+        Guillaume Laurent   <[email protected]>,
+        Chris Cannam        <[email protected]>,
+        Richard Bown        <[email protected]>
+
+    The moral right of the authors to claim authorship of this work
+    has been asserted.
+
+    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.
+*/
+
+#include <string>
+
+#include "Device.h"
+#include "Instrument.h"
+
+// An AudioDevice defines Instruments where we can play our
+// audio Segments.
+//
+//
+//
+#ifndef _AUDIODEVICE_H_
+#define _AUDIODEVICE_H_
+
+namespace Rosegarden
+{
+
+class AudioDevice : public Device
+{
+
+public:
+    AudioDevice();
+    AudioDevice(DeviceId id, const std::string &name);
+    virtual ~AudioDevice();
+
+    // Copy constructor
+    //
+    AudioDevice(const AudioDevice &);
+
+    virtual void addInstrument(Instrument*);
+
+    // An untainted Instrument we can use for playing previews
+    //
+    InstrumentId getPreviewInstrument();
+
+    // Turn into XML string
+    //
+    virtual std::string toXmlString(); 
+
+    virtual InstrumentList getAllInstruments() const { return m_instruments; }
+    virtual InstrumentList getPresentationInstruments() const
+        { return m_instruments; }
+
+private:
+
+};
+
+}
+
+#endif // _AUDIODEVICE_H_