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diff --git a/libs/midi++2/midi++/controllable.h b/libs/midi++2/midi++/controllable.h
new file mode 100644
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+++ b/libs/midi++2/midi++/controllable.h
@@ -0,0 +1,92 @@
+/*
+    Copyright (C) 1998-99 Paul Barton-Davis
+ 
+    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.
+
+    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.
+
+    $Id$
+*/
+
+#ifndef __qm_midicontrollable_h__
+#define __qm_midicontrollable_h__
+
+#include <string>
+
+#include <sigc++/sigc++.h>
+
+#include <midi++/types.h>
+
+namespace MIDI {
+
+class Channel;
+class Port;
+class Parser;
+
+class Controllable : public sigc::trackable
+{
+  public:
+	Controllable (Port *, bool bistate = false);
+	virtual ~Controllable ();
+
+	void midi_rebind (Port *, channel_t channel=-1);
+	void midi_forget ();
+	void learn_about_external_control ();
+	void stop_learning ();
+	void drop_external_control ();
+
+	virtual void set_value (float) = 0;
+
+	sigc::signal<void> learning_started;
+	sigc::signal<void> learning_stopped;
+
+	bool get_control_info (channel_t&, eventType&, byte&);
+	void set_control_type (channel_t, eventType, byte);
+
+	bool get_midi_feedback () { return feedback; }
+	void set_midi_feedback (bool val) { feedback = val; }
+
+	Port * get_port() { return port; }
+	
+	std::string control_description() const { return _control_description; }
+
+	void send_midi_feedback (float);
+	
+  private:
+	bool             bistate;
+	int              midi_msg_id;      /* controller ID or note number */
+	sigc::connection midi_sense_connection[2];
+	sigc::connection midi_learn_connection;
+	size_t           connections;
+	Port*            port;
+	eventType        control_type;
+	byte             control_additional;
+	channel_t        control_channel;
+	std::string     _control_description;
+	bool             feedback;
+	
+	void midi_receiver (Parser &p, byte *, size_t);
+	void midi_sense_note (Parser &, EventTwoBytes *, bool is_on);
+	void midi_sense_note_on (Parser &p, EventTwoBytes *tb);
+	void midi_sense_note_off (Parser &p, EventTwoBytes *tb);
+	void midi_sense_controller (Parser &, EventTwoBytes *);
+	void midi_sense_program_change (Parser &, byte);
+	void midi_sense_pitchbend (Parser &, pitchbend_t);
+
+	void bind_midi (channel_t, eventType, byte);
+};
+
+}; /* namespace MIDI */
+
+#endif // __qm_midicontrollable_h__
+