Replace imperative polyphony/polyphonic stuff with properties (kill more API).

git-svn-id: http://svn.drobilla.net/lad/ingen@1412 a436a847-0d15-0410-975c-d299462d15a1

44 files changed, 219 insertions, 316 deletions

diff --git a/src/bindings/Client.hpp b/src/bindings/Client.hpp
index 3f427ff3..6b187881 100644
--- a/src/bindings/Client.hpp
+++ b/src/bindings/Client.hpp
@@ -57,12 +57,6 @@ public:
 	                      const std::string& data_type,
 	                      bool               is_output)  {}
 	
-	virtual void polyphonic(const std::string& path,
-	                        bool               polyphonic) {}
-	
-	virtual void patch_polyphony(const std::string& path,
-	                             uint32_t           poly) = 0;
-	
 	virtual void patch_cleared(const std::string& path)  {}
 	
 	virtual void object_renamed(const std::string& old_path,
diff --git a/src/common/interface/ClientInterface.hpp b/src/common/interface/ClientInterface.hpp
index e4e1ef44..38625a15 100644
--- a/src/common/interface/ClientInterface.hpp
+++ b/src/common/interface/ClientInterface.hpp
@@ -74,12 +74,6 @@ public:
 	                        const std::string& symbol,
 	                        const std::string& name) = 0;
 	
-	virtual void polyphonic(const std::string& path,
-	                        bool               polyphonic) = 0;
-	
-	virtual void patch_polyphony(const std::string& path,
-	                             uint32_t           poly) = 0;
-	
 	virtual void patch_cleared(const std::string& path) = 0;
 	
 	virtual void object_renamed(const std::string& old_path,
diff --git a/src/common/interface/CommonInterface.hpp b/src/common/interface/CommonInterface.hpp
index db5234de..e76d0ce7 100644
--- a/src/common/interface/CommonInterface.hpp
+++ b/src/common/interface/CommonInterface.hpp
@@ -48,8 +48,7 @@ public:
 	                       uint32_t           poly) = 0;
 	
 	virtual void new_node(const std::string& path,
-	                      const std::string& plugin_uri,
-	                      bool               polyphonic) = 0;
+	                      const std::string& plugin_uri) = 0;
 	
 	virtual void new_port(const std::string& path,
 	                      uint32_t           index,
diff --git a/src/common/interface/EngineInterface.hpp b/src/common/interface/EngineInterface.hpp
index 05fcb822..4cd8c64e 100644
--- a/src/common/interface/EngineInterface.hpp
+++ b/src/common/interface/EngineInterface.hpp
@@ -63,8 +63,7 @@ public:
 	virtual void new_node_deprecated(const std::string& path,
 	                                 const std::string& plugin_type,
 	                                 const std::string& library_name,
-	                                 const std::string& plugin_label,
-	                                 bool               polyphonic) = 0;
+	                                 const std::string& plugin_label) = 0;
 	
 	virtual void rename(const std::string& old_path,
 	                    const std::string& new_symbol) = 0;
@@ -109,6 +108,9 @@ public:
 	
 	virtual void request_variable(const std::string& path,
 	                              const std::string& key) = 0;
+	
+	virtual void request_property(const std::string& path,
+	                              const std::string& key) = 0;
 
 	virtual void request_plugins() = 0;
 	
diff --git a/src/libs/client/ClientStore.cpp b/src/libs/client/ClientStore.cpp
index 1fb00eea..969f3a8f 100644
--- a/src/libs/client/ClientStore.cpp
+++ b/src/libs/client/ClientStore.cpp
@@ -42,8 +42,6 @@ ClientStore::ClientStore(SharedPtr<EngineInterface> engine, SharedPtr<SigClientI
 	emitter->signal_new_patch.connect(sigc::mem_fun(this, &ClientStore::new_patch_event));
 	emitter->signal_new_node.connect(sigc::mem_fun(this, &ClientStore::new_node_event));
 	emitter->signal_new_port.connect(sigc::mem_fun(this, &ClientStore::new_port_event));
-	emitter->signal_polyphonic.connect(sigc::mem_fun(this, &ClientStore::polyphonic_event));
-	emitter->signal_patch_polyphony.connect(sigc::mem_fun(this, &ClientStore::patch_polyphony_event));
 	emitter->signal_patch_cleared.connect(sigc::mem_fun(this, &ClientStore::patch_cleared_event));
 	emitter->signal_connection.connect(sigc::mem_fun(this, &ClientStore::connection_event));
 	emitter->signal_disconnection.connect(sigc::mem_fun(this, &ClientStore::disconnection_event));
@@ -417,14 +415,14 @@ ClientStore::new_patch_event(const Path& path, uint32_t poly)
 
 
 void
-ClientStore::new_node_event(const Path& path, const string& plugin_uri, bool polyphonic)
+ClientStore::new_node_event(const Path& path, const string& plugin_uri)
 {
 	SharedPtr<PluginModel> plug = plugin(plugin_uri);
 	if (!plug) {
-		SharedPtr<NodeModel> n(new NodeModel(plugin_uri, path, polyphonic));
+		SharedPtr<NodeModel> n(new NodeModel(plugin_uri, path));
 		add_plugin_orphan(n);
 	} else {
-		SharedPtr<NodeModel> n(new NodeModel(plug, path, polyphonic));
+		SharedPtr<NodeModel> n(new NodeModel(plug, path));
 		add_object(n);
 	}
 }
@@ -441,24 +439,6 @@ ClientStore::new_port_event(const Path& path, uint32_t index, const string& type
 		resolve_connection_orphans(p);
 }
 
-	
-void
-ClientStore::polyphonic_event(const Path& path, bool polyphonic)
-{
-	SharedPtr<ObjectModel> object = this->object(path);
-	if (object)
-		object->set_polyphonic(polyphonic);
-}
-
-
-void
-ClientStore::patch_polyphony_event(const Path& path, uint32_t poly)
-{
-	SharedPtr<PatchModel> patch = PtrCast<PatchModel>(object(path));
-	if (patch)
-		patch->poly(poly);
-}
-
 
 void
 ClientStore::patch_cleared_event(const Path& path)
diff --git a/src/libs/client/ClientStore.hpp b/src/libs/client/ClientStore.hpp
index e1b3adaa..a750f875 100644
--- a/src/libs/client/ClientStore.hpp
+++ b/src/libs/client/ClientStore.hpp
@@ -98,10 +98,8 @@ private:
 	void rename_event(const Path& old_path, const Path& new_path);
 	void new_plugin_event(const string& uri, const string& type_uri, const string& symbol, const string& name);
 	void new_patch_event(const Path& path, uint32_t poly);
-	void new_node_event(const Path& path, const string& plugin_uri, bool polyphonic);
+	void new_node_event(const Path& path, const string& plugin_uri);
 	void new_port_event(const Path& path, uint32_t index, const string& data_type, bool is_output);
-	void polyphonic_event(const Path& path, bool polyphonic);
-	void patch_polyphony_event(const Path& path, uint32_t poly);
 	void patch_cleared_event(const Path& path);
 	void variable_change_event(const Path& subject_path, const string& predicate, const Atom& value);
 	void property_change_event(const Path& subject_path, const string& predicate, const Atom& value);
diff --git a/src/libs/client/DeprecatedLoader.cpp b/src/libs/client/DeprecatedLoader.cpp
index 3ed6bc5f..6ec1db81 100644
--- a/src/libs/client/DeprecatedLoader.cpp
+++ b/src/libs/client/DeprecatedLoader.cpp
@@ -519,9 +519,11 @@ DeprecatedLoader::load_node(const Path& parent, xmlDocPtr doc, const xmlNodePtr
 			}
 
 			if (plugin_uri != "")
-				_engine->new_node(path, plugin_uri, polyphonic);
+				_engine->new_node(path, plugin_uri);
 			else
-				_engine->new_node_deprecated(path, plugin_type, library_name, plugin_label, polyphonic);
+				_engine->new_node_deprecated(path, plugin_type, library_name, plugin_label);
+
+			_engine->set_property(path, "ingen:polyphonic", polyphonic);
 		
 			for (GraphObject::Variables::const_iterator i = initial_data.begin(); i != initial_data.end(); ++i)
 				_engine->set_variable(path, i->first, i->second);
@@ -531,7 +533,8 @@ DeprecatedLoader::load_node(const Path& parent, xmlDocPtr doc, const xmlNodePtr
 
 	// Not deprecated
 	} else {
-		_engine->new_node(path, plugin_uri, polyphonic);
+		_engine->new_node(path, plugin_uri);
+		_engine->set_property(path, "ingen:polyphonic", polyphonic);
 		for (GraphObject::Variables::const_iterator i = initial_data.begin(); i != initial_data.end(); ++i)
 			_engine->set_variable(path, i->first, i->second);
 		return true;
diff --git a/src/libs/client/NodeModel.cpp b/src/libs/client/NodeModel.cpp
index 96d70663..45d7cffe 100644
--- a/src/libs/client/NodeModel.cpp
+++ b/src/libs/client/NodeModel.cpp
@@ -27,8 +27,8 @@ namespace Ingen {
 namespace Client {
 
 
-NodeModel::NodeModel(SharedPtr<PluginModel> plugin, const Path& path, bool polyphonic)
-	: ObjectModel(path, polyphonic)
+NodeModel::NodeModel(SharedPtr<PluginModel> plugin, const Path& path)
+	: ObjectModel(path)
 	, _plugin_uri(plugin->uri())
 	, _plugin(plugin)
 	, _min_values(0)
@@ -36,8 +36,8 @@ NodeModel::NodeModel(SharedPtr<PluginModel> plugin, const Path& path, bool polyp
 {
 }
 
-NodeModel::NodeModel(const string& plugin_uri, const Path& path, bool polyphonic)
-	: ObjectModel(path, polyphonic)
+NodeModel::NodeModel(const string& plugin_uri, const Path& path)
+	: ObjectModel(path)
 	, _plugin_uri(plugin_uri)
 	, _min_values(0)
 	, _max_values(0)
diff --git a/src/libs/client/NodeModel.hpp b/src/libs/client/NodeModel.hpp
index 08e106ab..1f212b6b 100644
--- a/src/libs/client/NodeModel.hpp
+++ b/src/libs/client/NodeModel.hpp
@@ -68,8 +68,8 @@ public:
 protected:
 	friend class ClientStore;
 	
-	NodeModel(const string& plugin_uri, const Path& path, bool polyphonic);
-	NodeModel(SharedPtr<PluginModel> plugin, const Path& path, bool polyphonic);
+	NodeModel(const string& plugin_uri, const Path& path);
+	NodeModel(SharedPtr<PluginModel> plugin, const Path& path);
 
 	NodeModel(const Path& path);
 	void add_child(SharedPtr<ObjectModel> c);
diff --git a/src/libs/client/OSCClientReceiver.cpp b/src/libs/client/OSCClientReceiver.cpp
index 6087736f..5f12cd6e 100644
--- a/src/libs/client/OSCClientReceiver.cpp
+++ b/src/libs/client/OSCClientReceiver.cpp
@@ -145,16 +145,12 @@ OSCClientReceiver::setup_callbacks()
 	lo_server_thread_add_method(_st, "/ingen/plugin", "ssss", plugin_cb, this);
 	lo_server_thread_add_method(_st, "/ingen/new_patch", "si", new_patch_cb, this);
 	lo_server_thread_add_method(_st, "/ingen/destroyed", "s", destroyed_cb, this);
-	lo_server_thread_add_method(_st, "/ingen/patch_polyphony", "si", patch_polyphony_cb, this);
 	lo_server_thread_add_method(_st, "/ingen/patch_cleared", "s", patch_cleared_cb, this);
 	lo_server_thread_add_method(_st, "/ingen/object_renamed", "ss", object_renamed_cb, this);
 	lo_server_thread_add_method(_st, "/ingen/new_connection", "ss", connection_cb, this);
 	lo_server_thread_add_method(_st, "/ingen/disconnection", "ss", disconnection_cb, this);
-	lo_server_thread_add_method(_st, "/ingen/new_node", "ssT", new_node_cb, this);
-	lo_server_thread_add_method(_st, "/ingen/new_node", "ssF", new_node_cb, this);
+	lo_server_thread_add_method(_st, "/ingen/new_node", "ss", new_node_cb, this);
 	lo_server_thread_add_method(_st, "/ingen/new_port", "sisi", new_port_cb, this);
-	lo_server_thread_add_method(_st, "/ingen/polyphonic", "sT", polyphonic_cb, this);
-	lo_server_thread_add_method(_st, "/ingen/polyphonic", "sF", polyphonic_cb, this);
 	lo_server_thread_add_method(_st, "/ingen/set_variable", NULL, set_variable_cb, this);
 	lo_server_thread_add_method(_st, "/ingen/set_property", NULL, set_property_cb, this);
 	lo_server_thread_add_method(_st, "/ingen/set_port_value", "sf", set_port_value_cb, this);
@@ -192,14 +188,6 @@ OSCClientReceiver::_destroyed_cb(const char* path, const char* types, lo_arg** a
 
 
 int
-OSCClientReceiver::_patch_polyphony_cb(const char* path, const char* types, lo_arg** argv, int argc, lo_message msg)
-{
-	patch_polyphony((const char*)&argv[0]->s, argv[1]->i);
-	return 0;
-}
-
-
-int
 OSCClientReceiver::_patch_cleared_cb(const char* path, const char* types, lo_arg** argv, int argc, lo_message msg)
 {
 	patch_cleared((const char*)&argv[0]->s);
@@ -246,9 +234,8 @@ OSCClientReceiver::_new_node_cb(const char* path, const char* types, lo_arg** ar
 {
 	const char*   uri        = &argv[0]->s;
 	const char*   node_path  = &argv[1]->s;
-	const bool    polyphonic = (types[2] == 'T');
 
-	new_node(uri, node_path, polyphonic);
+	new_node(uri, node_path);
 
 	return 0;
 }
@@ -270,20 +257,6 @@ OSCClientReceiver::_new_port_cb(const char* path, const char* types, lo_arg** ar
 }
 
 
-/** Notification of an object's polyphonic flag
- */
-int
-OSCClientReceiver::_polyphonic_cb(const char* path, const char* types, lo_arg** argv, int argc, lo_message msg)
-{
-	const char* obj_path = &argv[0]->s;
-	const bool  poly     = (types[1] == 'T');
-
-	polyphonic(obj_path, poly);
-
-	return 0;	
-}
-
-
 /** Notification of a new or updated variable.
  */
 int
diff --git a/src/libs/client/OSCClientReceiver.hpp b/src/libs/client/OSCClientReceiver.hpp
index 9950df7d..eb1efd21 100644
--- a/src/libs/client/OSCClientReceiver.hpp
+++ b/src/libs/client/OSCClientReceiver.hpp
@@ -86,14 +86,12 @@ private:
 	LO_HANDLER(plugin_list_end);
 	LO_HANDLER(new_patch);
 	LO_HANDLER(destroyed);
-	LO_HANDLER(patch_polyphony);
 	LO_HANDLER(patch_cleared);
 	LO_HANDLER(object_renamed);
 	LO_HANDLER(connection);
 	LO_HANDLER(disconnection);
 	LO_HANDLER(new_node);
 	LO_HANDLER(new_port);
-	LO_HANDLER(polyphonic);
 	LO_HANDLER(set_variable);
 	LO_HANDLER(set_property);
 	LO_HANDLER(set_port_value);
diff --git a/src/libs/client/OSCEngineSender.cpp b/src/libs/client/OSCEngineSender.cpp
index d235e7a9..22f0ce86 100644
--- a/src/libs/client/OSCEngineSender.cpp
+++ b/src/libs/client/OSCEngineSender.cpp
@@ -156,22 +156,14 @@ OSCEngineSender::new_port(const string& path,
 
 void
 OSCEngineSender::new_node(const string& path,
-                          const string& plugin_uri,
-                          bool          polyphonic)
+                          const string& plugin_uri)
 {
 
-	if (polyphonic)
-		send("/ingen/new_node",  "issT",
-			next_id(),
-			path.c_str(),
-			plugin_uri.c_str(),
-			LO_ARGS_END);
-	else
-		send("/ingen/new_node",  "issF",
-			next_id(),
-			path.c_str(),
-			plugin_uri.c_str(),
-			LO_ARGS_END);
+	send("/ingen/new_node",  "iss",
+		next_id(),
+		path.c_str(),
+		plugin_uri.c_str(),
+		LO_ARGS_END);
 }
 
 
@@ -183,25 +175,15 @@ void
 OSCEngineSender::new_node_deprecated(const string& path,
                                      const string& plugin_type,
                                      const string& library_name,
-                                     const string& plugin_label,
-                                     bool          polyphonic)
+                                     const string& plugin_label)
 {
-	if (polyphonic)
-		send("/ingen/new_node",  "issssT",
-			next_id(),
-			path.c_str(),
-			plugin_type.c_str(),
-			library_name.c_str(),
-			plugin_label.c_str(),
-			LO_ARGS_END);
-	else
-		send("/ingen/new_node",  "issssF",
-			next_id(),
-			path.c_str(),
-			plugin_type.c_str(),
-			library_name.c_str(),
-			plugin_label.c_str(),
-			LO_ARGS_END);
+	send("/ingen/new_node",  "issss",
+		next_id(),
+		path.c_str(),
+		plugin_type.c_str(),
+		library_name.c_str(),
+		plugin_label.c_str(),
+		LO_ARGS_END);
 }
 
 
@@ -459,6 +441,7 @@ OSCEngineSender::request_port_value(const string& port_path)
 		LO_ARGS_END);
 }
 
+
 void
 OSCEngineSender::request_variable(const string& object_path, const string& key)
 {
@@ -469,6 +452,17 @@ OSCEngineSender::request_variable(const string& object_path, const string& key)
 		LO_ARGS_END);
 }
 
+	
+void
+OSCEngineSender::request_property(const string& object_path, const string& key)
+{
+	send("/ingen/request_property", "iss",
+		next_id(),
+		object_path.c_str(),
+		key.c_str(),
+		LO_ARGS_END);
+}
+
 
 void
 OSCEngineSender::request_plugins()
diff --git a/src/libs/client/OSCEngineSender.hpp b/src/libs/client/OSCEngineSender.hpp
index 985e1db3..771a7232 100644
--- a/src/libs/client/OSCEngineSender.hpp
+++ b/src/libs/client/OSCEngineSender.hpp
@@ -86,14 +86,12 @@ public:
 	              bool          is_output);
 
 	void new_node(const string& path,
-	              const string& plugin_uri,
-	              bool          polyphonic);
+	              const string& plugin_uri);
 	
 	void new_node_deprecated(const string& path,
 	                         const string& plugin_type,
 	                         const string& library_name,
-	                         const string& plugin_label,
-	                         bool          polyphonic);
+	                         const string& plugin_label);
 
 	void rename(const string& old_path,
 	            const string& new_name);
@@ -148,19 +146,13 @@ public:
 	                  const Raul::Atom& value);
 	
 	// Requests //
-	
 	void ping();
-
 	void request_plugin(const string& uri);
-
 	void request_object(const string& path);
-
 	void request_port_value(const string& port_path);
-	
 	void request_variable(const string& path, const string& key);
-
+	void request_property(const string& path, const string& key);
 	void request_plugins();
-
 	void request_all_objects();
 
 protected:
diff --git a/src/libs/client/ObjectModel.cpp b/src/libs/client/ObjectModel.cpp
index c807797e..c9236c9e 100644
--- a/src/libs/client/ObjectModel.cpp
+++ b/src/libs/client/ObjectModel.cpp
@@ -26,9 +26,8 @@ namespace Ingen {
 namespace Client {
 
 
-ObjectModel::ObjectModel(const Path& path, bool polyphonic)
+ObjectModel::ObjectModel(const Path& path)
 	: _path(path)
-	, _polyphonic(polyphonic)
 {
 }
 
@@ -38,7 +37,7 @@ ObjectModel::~ObjectModel()
 }
 	
 
-/** Get a piece of variable for this object.
+/** Get a variable for this object.
  *
  * @return Metadata value with key @a key, empty string otherwise.
  */
@@ -55,11 +54,28 @@ ObjectModel::get_variable(const string& key) const
 }
 
 
-void
-ObjectModel::set_polyphonic(bool polyphonic)
+/** Get a property of this object.
+ *
+ * @return Metadata value with key @a key, empty string otherwise.
+ */
+const Atom&
+ObjectModel::get_property(const string& key) const
+{
+	static const Atom null_atom;
+
+	Variables::const_iterator i = _properties.find(key);
+	if (i != _properties.end())
+		return i->second;
+	else
+		return null_atom;
+}
+
+
+bool
+ObjectModel::polyphonic() const
 {
-	_polyphonic = polyphonic;
-	signal_polyphonic.emit(polyphonic);
+	Variables::const_iterator i = _properties.find("ingen:polyphonic");
+	return (i != _properties.end() && i->second.type() == Atom::BOOL && i->second.get_bool());
 }
 
 
diff --git a/src/libs/client/ObjectModel.hpp b/src/libs/client/ObjectModel.hpp
index 460d7d9d..b0796275 100644
--- a/src/libs/client/ObjectModel.hpp
+++ b/src/libs/client/ObjectModel.hpp
@@ -60,10 +60,12 @@ public:
 	virtual ~ObjectModel();
 
 	const Atom& get_variable(const string& key) const;
-	void set_variable(const string& key, const Atom& value)
+	const Atom& get_property(const string& key) const;
+	
+	virtual void set_variable(const string& key, const Atom& value)
 		{ _variables[key] = value; signal_variable.emit(key, value); }
 	
-	void set_property(const string& key, const Atom& value)
+	virtual void set_property(const string& key, const Atom& value)
 		{ _properties[key] = value; signal_property.emit(key, value); }
 
 	const Variables&       variables()  const { return _variables; }
@@ -71,7 +73,7 @@ public:
 	const Path             path()       const { return _path; }
 	const Symbol           symbol()     const { return _path.name(); }
 	SharedPtr<ObjectModel> parent()     const { return _parent; }
-	bool                   polyphonic() const { return _polyphonic; }
+	bool                   polyphonic() const;
 	
 	GraphObject* graph_parent() const { return _parent.get(); }
 
@@ -80,26 +82,22 @@ public:
 	sigc::signal<void, SharedPtr<ObjectModel> >    signal_removed_child; 
 	sigc::signal<void, const string&, const Atom&> signal_variable; 
 	sigc::signal<void, const string&, const Atom&> signal_property; 
-	sigc::signal<void, bool>                       signal_polyphonic; 
 	sigc::signal<void>                             signal_destroyed; 
 	sigc::signal<void>                             signal_renamed; 
 
 protected:
 	friend class ClientStore;
 	
-	ObjectModel(const Path& path, bool polyphonic);
+	ObjectModel(const Path& path);
 	
 	virtual void set_path(const Path& p) { _path = p; signal_renamed.emit(); }
 	virtual void set_parent(SharedPtr<ObjectModel> p) { assert(p); _parent = p; }
 	virtual void add_child(SharedPtr<ObjectModel> c) {}
 	virtual bool remove_child(SharedPtr<ObjectModel> c) { return true; }
 
-	void set_polyphonic(bool);
-	
 	virtual void set(SharedPtr<ObjectModel> model);
 
 	Path                   _path;
-	bool                   _polyphonic;
 	SharedPtr<ObjectModel> _parent;
 	
 	Variables _variables;
diff --git a/src/libs/client/PatchModel.cpp b/src/libs/client/PatchModel.cpp
index 38019eda..4fe0e641 100644
--- a/src/libs/client/PatchModel.cpp
+++ b/src/libs/client/PatchModel.cpp
@@ -166,6 +166,15 @@ PatchModel::enabled() const
 	Variables::const_iterator i = _properties.find("ingen:enabled");
 	return (i != _properties.end() && i->second.type() == Atom::BOOL && i->second.get_bool());
 }
+	
+
+void
+PatchModel::set_property(const string& key, const Atom& value)
+{
+	ObjectModel::set_property(key, value);
+	if (key == "ingen:polyphony")
+		_poly = value.get_int32();
+}
 
 
 bool
diff --git a/src/libs/client/PatchModel.hpp b/src/libs/client/PatchModel.hpp
index e39ee2f7..8c60e884 100644
--- a/src/libs/client/PatchModel.hpp
+++ b/src/libs/client/PatchModel.hpp
@@ -48,7 +48,7 @@ public:
 	SharedPtr<ConnectionModel> get_connection(const string& src_port_path,
 	                                          const string& dst_port_path) const;
 	
-	size_t   poly()               const { return _poly; }
+	uint32_t poly()               const { return _poly; }
 	uint32_t internal_polyphony() const { return _poly; }
 	bool     enabled()            const;
 	bool     polyphonic()         const;
@@ -61,6 +61,8 @@ public:
 		_editable = e;
 		signal_editable.emit(e);
 	} }
+	
+	virtual void set_property(const string& key, const Atom& value);
 
 	static unsigned child_name_offset(ClientStore& store,
 	                                  SharedPtr<PatchModel> parent,
@@ -71,20 +73,18 @@ public:
 	sigc::signal<void, SharedPtr<NodeModel> >       signal_removed_node; 
 	sigc::signal<void, SharedPtr<ConnectionModel> > signal_new_connection; 
 	sigc::signal<void, SharedPtr<ConnectionModel> > signal_removed_connection;
-	sigc::signal<void, uint32_t>                    signal_polyphony;
 	sigc::signal<void, bool>                        signal_editable;
 
 private:
 	friend class ClientStore;
 
 	PatchModel(const Path& patch_path, size_t internal_poly)
-		: NodeModel("ingen:Patch", patch_path, false) // FIXME
+		: NodeModel("ingen:Patch", patch_path)
 		, _poly(internal_poly)
 		, _editable(true)
 	{
 	}
 	
-	void poly(size_t p) { _poly = p; signal_polyphony.emit(p); }
 	void clear();
 	void add_child(SharedPtr<ObjectModel> c);
 	bool remove_child(SharedPtr<ObjectModel> c);
diff --git a/src/libs/client/PortModel.hpp b/src/libs/client/PortModel.hpp
index 3739be58..8fa18f1c 100644
--- a/src/libs/client/PortModel.hpp
+++ b/src/libs/client/PortModel.hpp
@@ -74,7 +74,7 @@ private:
 	friend class ClientStore;
 	
 	PortModel(const Path& path, uint32_t index, DataType type, Direction dir)
-		: ObjectModel(path, true)
+		: ObjectModel(path)
 		, _index(index)
 		, _type(type)
 		, _direction(dir)
diff --git a/src/libs/client/SigClientInterface.hpp b/src/libs/client/SigClientInterface.hpp
index 6318f440..dbedd79c 100644
--- a/src/libs/client/SigClientInterface.hpp
+++ b/src/libs/client/SigClientInterface.hpp
@@ -54,10 +54,8 @@ public:
 	sigc::signal<void, uint32_t>                           signal_num_plugins; 
 	sigc::signal<void, string, string, string, string>     signal_new_plugin; 
 	sigc::signal<void, string, uint32_t>                   signal_new_patch; 
-	sigc::signal<void, string, string, bool>               signal_new_node; 
+	sigc::signal<void, string, string>                     signal_new_node; 
 	sigc::signal<void, string, uint32_t, string, bool>     signal_new_port; 
-	sigc::signal<void, string, bool>                       signal_polyphonic; 
-	sigc::signal<void, string, uint32_t>                   signal_patch_polyphony; 
 	sigc::signal<void, string>                             signal_patch_cleared; 
 	sigc::signal<void, string, string>                     signal_object_renamed; 
 	sigc::signal<void, string>                             signal_object_destroyed; 
@@ -109,24 +107,18 @@ protected:
 	void new_patch(const string& path, uint32_t poly)
 		{ if (_enabled) signal_new_patch.emit(path, poly); }
 	
-	void new_node(const string& path, const string& plugin_uri, bool poly)
-		{ if (_enabled) signal_new_node.emit(path, plugin_uri, poly); }
+	void new_node(const string& path, const string& plugin_uri)
+		{ if (_enabled) signal_new_node.emit(path, plugin_uri); }
 	
 	void new_port(const string& path, uint32_t index, const string& data_type, bool is_output)
 		{ if (_enabled) signal_new_port.emit(path, index, data_type, is_output); }
 	
-	void polyphonic(const string& path, bool polyphonic)
-		{ if (_enabled) signal_polyphonic.emit(path, polyphonic); }
-
 	void connect(const string& src_port_path, const string& dst_port_path)
 		{ if (_enabled) signal_connection.emit(src_port_path, dst_port_path); }
 
 	void object_destroyed(const string& path)
 		{ if (_enabled) signal_object_destroyed.emit(path); }
 	
-	void patch_polyphony(const string& path, uint32_t poly)
-		{ if (_enabled) signal_patch_polyphony.emit(path, poly); }
-
 	void patch_cleared(const string& path)
 		{ if (_enabled) signal_patch_cleared.emit(path); }
 
diff --git a/src/libs/client/ThreadedSigClientInterface.hpp b/src/libs/client/ThreadedSigClientInterface.hpp
index 291df426..fb6eb447 100644
--- a/src/libs/client/ThreadedSigClientInterface.hpp
+++ b/src/libs/client/ThreadedSigClientInterface.hpp
@@ -54,9 +54,7 @@ public:
 	, new_patch_slot(signal_new_patch.make_slot())
 	, new_node_slot(signal_new_node.make_slot())
 	, new_port_slot(signal_new_port.make_slot())
-	, polyphonic_slot(signal_polyphonic.make_slot())
 	, connection_slot(signal_connection.make_slot())
-	, patch_polyphony_slot(signal_patch_polyphony.make_slot())
 	, patch_cleared_slot(signal_patch_cleared.make_slot())
 	, object_destroyed_slot(signal_object_destroyed.make_slot())
 	, object_renamed_slot(signal_object_renamed.make_slot())
@@ -99,24 +97,18 @@ public:
 	void new_patch(const string& path, uint32_t poly)
 		{ push_sig(sigc::bind(new_patch_slot, path, poly)); }
 	
-	void new_node(const string& path, const string& plugin_uri, bool polyphonic)
-		{ push_sig(sigc::bind(new_node_slot, path, plugin_uri, polyphonic)); }
+	void new_node(const string& path, const string& plugin_uri)
+		{ push_sig(sigc::bind(new_node_slot, path, plugin_uri)); }
 	
 	void new_port(const string& path, uint32_t index,  const string& data_type, bool is_output)
 		{ push_sig(sigc::bind(new_port_slot, path, index, data_type, is_output)); }
 	
-	void polyphonic(const string& path, bool polyphonic)
-		{ push_sig(sigc::bind(polyphonic_slot, path, polyphonic)); }
-
 	void connect(const string& src_port_path, const string& dst_port_path)
 		{ push_sig(sigc::bind(connection_slot, src_port_path, dst_port_path)); }
 
 	void object_destroyed(const string& path)
 		{ push_sig(sigc::bind(object_destroyed_slot, path)); }
 	
-	void patch_polyphony(const string& path, uint32_t poly)
-		{ push_sig(sigc::bind(patch_polyphony_slot, path, poly)); }
-
 	void patch_cleared(const string& path)
 		{ push_sig(sigc::bind(patch_cleared_slot, path)); }
 
@@ -164,11 +156,9 @@ private:
 	sigc::slot<void, string>                             error_slot; 
 	sigc::slot<void, string, string, string, string>     new_plugin_slot; 
 	sigc::slot<void, string, uint32_t>                   new_patch_slot; 
-	sigc::slot<void, string, string, bool>               new_node_slot; 
+	sigc::slot<void, string, string>                     new_node_slot; 
 	sigc::slot<void, string, uint32_t, string, bool>     new_port_slot;
-	sigc::slot<void, string, bool>                       polyphonic_slot;
 	sigc::slot<void, string, string>                     connection_slot;
-	sigc::slot<void, string, uint32_t>                   patch_polyphony_slot; 
 	sigc::slot<void, string>                             patch_cleared_slot; 
 	sigc::slot<void, string>                             object_destroyed_slot; 
 	sigc::slot<void, string, string>                     object_renamed_slot; 
diff --git a/src/libs/engine/ClientBroadcaster.cpp b/src/libs/engine/ClientBroadcaster.cpp
index dce6691e..ff880433 100644
--- a/src/libs/engine/ClientBroadcaster.cpp
+++ b/src/libs/engine/ClientBroadcaster.cpp
@@ -162,14 +162,6 @@ ClientBroadcaster::send_destroyed(const string& path)
 
 
 void
-ClientBroadcaster::send_polyphonic(const string& path, bool polyphonic)
-{
-	for (Clients::const_iterator i = _clients.begin(); i != _clients.end(); ++i)
-		(*i).second->polyphonic(path, polyphonic);
-}
-
-
-void
 ClientBroadcaster::send_patch_cleared(const string& patch_path)
 {
 	for (Clients::const_iterator i = _clients.begin(); i != _clients.end(); ++i)
@@ -192,14 +184,6 @@ ClientBroadcaster::send_disconnection(const string& src_port_path, const string&
 }
 
 
-void
-ClientBroadcaster::send_patch_polyphony(const string& patch_path, uint32_t poly)
-{
-	for (Clients::const_iterator i = _clients.begin(); i != _clients.end(); ++i)
-		(*i).second->patch_polyphony(patch_path, poly);
-}
-
-
 /** Send notification of a variable update.
  *
  * Like control changes, does not send update to client that set the variable, if applicable.
diff --git a/src/libs/engine/ClientBroadcaster.hpp b/src/libs/engine/ClientBroadcaster.hpp
index 07da01f5..b0963610 100644
--- a/src/libs/engine/ClientBroadcaster.hpp
+++ b/src/libs/engine/ClientBroadcaster.hpp
@@ -71,12 +71,10 @@ public:
 	void send_node(const NodeImpl* node, bool recursive);
 	void send_port(const PortImpl* port);
 	void send_destroyed(const string& path);
-	void send_polyphonic(const string& path, bool polyphonic);
 	void send_patch_cleared(const string& patch_path);
 	void send_connection(const SharedPtr<const ConnectionImpl> connection);
 	void send_disconnection(const string& src_port_path, const string& dst_port_path);
 	void send_rename(const string& old_path, const string& new_path);
-	void send_patch_polyphony(const string& patch_path, uint32_t poly);
 	void send_variable_change(const string& node_path, const string& key, const Raul::Atom& value);
 	void send_property_change(const string& node_path, const string& key, const Raul::Atom& value);
 	void send_port_value(const string& port_path, const Raul::Atom& value);
diff --git a/src/libs/engine/GraphObjectImpl.hpp b/src/libs/engine/GraphObjectImpl.hpp
index 1eb8acc9..628db3db 100644
--- a/src/libs/engine/GraphObjectImpl.hpp
+++ b/src/libs/engine/GraphObjectImpl.hpp
@@ -78,8 +78,15 @@ public:
 		Variables::iterator i = _variables.find(key);
 		return (i != _variables.end()) ? (*i).second : null_atom;
 	}
+	
+	const Atom& get_property(const std::string& key) {
+		static Atom null_atom;
+		Variables::iterator i = _properties.find(key);
+		return (i != _properties.end()) ? (*i).second : null_atom;
+	}
 
-	const Variables& variables() const { return _variables; }
+	const Variables& variables()  const { return _variables; }
+	const Variables& properties() const { return _properties; }
 
 	/** The Patch this object is a child of. */
 	virtual PatchImpl* parent_patch() const;
@@ -111,6 +118,7 @@ protected:
 
 private:	
 	Variables _variables;
+	Variables _properties;
 };
 
 
diff --git a/src/libs/engine/OSCClientSender.cpp b/src/libs/engine/OSCClientSender.cpp
index 1429d616..63b7033f 100644
--- a/src/libs/engine/OSCClientSender.cpp
+++ b/src/libs/engine/OSCClientSender.cpp
@@ -211,15 +211,9 @@ OSCClientSender::plugins()
  * followed by /ingen/new_node_end. </p> \n \n
  */
 void OSCClientSender::new_node(const std::string& node_path,
-                               const std::string& plugin_uri,
-                               bool               is_polyphonic)
+                               const std::string& plugin_uri)
 {
-	if (is_polyphonic)
-		send("/ingen/new_node", "ssT", node_path.c_str(),
-				plugin_uri.c_str(), LO_ARGS_END);
-	else
-		send("/ingen/new_node", "ssF", node_path.c_str(),
-				plugin_uri.c_str(), LO_ARGS_END);
+	send("/ingen/new_node", "ss", node_path.c_str(), plugin_uri.c_str());
 }
 
 
@@ -250,30 +244,6 @@ OSCClientSender::new_port(const std::string& path,
 
 
 /** \page client_osc_namespace
- * <p> \b /ingen/polyphonic - Notification an object's polyphonic property has changed.
- * \arg \b path (string) - Path of object
- * \arg \b polyphonic (bool) - Whether or not object is polyphonic (from it's parent's perspective).
- *
- * \li This is a notification that the object is <em>externally</em> polyphonic,
- * i.e. its parent sees several independent buffers for a single port, one for each voice.
- * An object can be internally polyphonic but externally not if the voices are mixed down;
- * this is true of some instruments and subpatches with mismatched polyphony. </p> \n \n
- */
-void
-OSCClientSender::polyphonic(const std::string& path,
-                            bool               polyphonic)
-{
-	if (!_enabled)
-		return;
-
-	if (polyphonic)
-		lo_send(_address, "/ingen/polyphonic", "sT", path.c_str());
-	else
-		lo_send(_address, "/ingen/polyphonic", "sF", path.c_str());
-}
-
-
-/** \page client_osc_namespace
  * <p> \b /ingen/destroyed - Notification an object has been destroyed
  * \arg \b path (string) - Path of object (which no longer exists) </p> \n \n
  */
@@ -298,21 +268,6 @@ OSCClientSender::patch_cleared(const std::string& patch_path)
 
 
 /** \page client_osc_namespace
- * <p> \b /ingen/patch_polyphony - Notification a patch's DSP processing has been polyphony.
- * \arg \b path (string) - Path of polyphony patch</p> \n \n
- */
-void
-OSCClientSender::patch_polyphony(const std::string& patch_path, uint32_t poly)
-{
-	if (!_enabled)
-		return;
-
-	lo_send(_address, "/ingen/patch_polyphony", "si", patch_path.c_str(), poly);
-}
-
-
-
-/** \page client_osc_namespace
  * <p> \b /ingen/new_connection - Notification a new connection has been made.
  * \arg \b src-path (string) - Path of the source port
  * \arg \b dst-path (string) - Path of the destination port</p> \n \n
diff --git a/src/libs/engine/OSCClientSender.hpp b/src/libs/engine/OSCClientSender.hpp
index 714e17b2..9a79f934 100644
--- a/src/libs/engine/OSCClientSender.hpp
+++ b/src/libs/engine/OSCClientSender.hpp
@@ -79,20 +79,13 @@ public:
 	virtual void new_patch(const std::string& path, uint32_t poly);
 	
 	virtual void new_node(const std::string&   path,
-	                      const std::string&   plugin_uri,
-	                      bool                 is_polyphonic);
+	                      const std::string&   plugin_uri);
 	
 	virtual void new_port(const std::string& path,
 	                      uint32_t           index,
 	                      const std::string& data_type,
 	                      bool               is_output);
 	
-	virtual void polyphonic(const std::string& path,
-	                        bool               polyphonic);
-	
-	virtual void patch_polyphony(const std::string& path,
-	                             uint32_t           poly);
-	
 	virtual void patch_cleared(const std::string& path);
 	
 	virtual void object_destroyed(const std::string& path);
diff --git a/src/libs/engine/OSCEngineReceiver.cpp b/src/libs/engine/OSCEngineReceiver.cpp
index afac70b0..b9e2a70d 100644
--- a/src/libs/engine/OSCEngineReceiver.cpp
+++ b/src/libs/engine/OSCEngineReceiver.cpp
@@ -92,10 +92,10 @@ OSCEngineReceiver::OSCEngineReceiver(Engine& engine, size_t queue_size, uint16_t
 	lo_server_add_method(_server, "/ingen/set_polyphonic", "isT", set_polyphonic_cb, this);
 	lo_server_add_method(_server, "/ingen/set_polyphonic", "isF", set_polyphonic_cb, this);
 	lo_server_add_method(_server, "/ingen/new_port", "issi", new_port_cb, this);
-	lo_server_add_method(_server, "/ingen/new_node", "issssT", new_node_cb, this);
-	lo_server_add_method(_server, "/ingen/new_node", "issssF", new_node_cb, this);
-	lo_server_add_method(_server, "/ingen/new_node", "issT", new_node_by_uri_cb, this);
-	lo_server_add_method(_server, "/ingen/new_node", "issF", new_node_by_uri_cb, this);
+	lo_server_add_method(_server, "/ingen/new_node", "issss", new_node_cb, this);
+	lo_server_add_method(_server, "/ingen/new_node", "issss", new_node_cb, this);
+	lo_server_add_method(_server, "/ingen/new_node", "iss", new_node_by_uri_cb, this);
+	lo_server_add_method(_server, "/ingen/new_node", "iss", new_node_by_uri_cb, this);
 	lo_server_add_method(_server, "/ingen/destroy", "is", destroy_cb, this);
 	lo_server_add_method(_server, "/ingen/rename", "iss", rename_cb, this);
 	lo_server_add_method(_server, "/ingen/connect", "iss", connect_cb, this);
@@ -477,17 +477,15 @@ OSCEngineReceiver::_new_port_cb(const char* path, const char* types, lo_arg** ar
  * <p> \b /ingen/new_node - Add a node into a given patch (load a plugin by URI)
  * \arg \b response-id (integer)
  * \arg \b node-path (string) - Full path of the new node (ie. /patch2/subpatch/newnode)
- * \arg \b plug-uri (string) - URI of the plugin to load
- * \arg \b polyphonic (boolean) - Whether node is polyphonic </p> \n \n
+ * \arg \b plug-uri (string) - URI of the plugin to load \n \n
  */
 int
 OSCEngineReceiver::_new_node_by_uri_cb(const char* path, const char* types, lo_arg** argv, int argc, lo_message msg)
 {
 	const char* node_path  = &argv[1]->s;
 	const char* plug_uri   = &argv[2]->s;
-	bool        polyphonic = (types[3] == 'T');
 	
-	new_node(node_path, plug_uri, polyphonic);
+	new_node(node_path, plug_uri);
 	return 0;
 }
 
@@ -498,8 +496,7 @@ OSCEngineReceiver::_new_node_by_uri_cb(const char* path, const char* types, lo_a
  * \arg \b node-path (string) - Full path of the new node (ie. /patch2/subpatch/newnode)
  * \arg \b type (string) - Plugin type ("LADSPA" or "Internal")
  * \arg \b lib-name (string) - Name of library where plugin resides (eg "cmt.so")
- * \arg \b plug-label (string) - Label (ID) of plugin (eg "sine_fcaa")
- * \arg \b poly (boolean) - Whether node is polyphonic
+ * \arg \b plug-label (string) - Label (ID) of plugin (eg "sine_fcaa") \n \n
  *
  * \li This is only here to provide backwards compatibility for old patches that store LADSPA plugin
  * references as libname, label.  It is to be removed ASAP, don't use it.
@@ -512,9 +509,8 @@ OSCEngineReceiver::_new_node_cb(const char* path, const char* types, lo_arg** ar
 	const char* type        = &argv[2]->s;
 	const char* lib_name    = &argv[3]->s;
 	const char* plug_label  = &argv[4]->s;
-	bool        polyphonic = (types[5] == 'T');
 	
-	new_node_deprecated(node_path, type, lib_name, plug_label, polyphonic);
+	new_node_deprecated(node_path, type, lib_name, plug_label);
 	return 0;
 }
 
diff --git a/src/libs/engine/ObjectSender.cpp b/src/libs/engine/ObjectSender.cpp
index 82500446..3a716a28 100644
--- a/src/libs/engine/ObjectSender.cpp
+++ b/src/libs/engine/ObjectSender.cpp
@@ -36,7 +36,7 @@ ObjectSender::send_patch(ClientInterface* client, const PatchImpl* patch, bool r
 	client->bundle_begin();
 
 	client->new_patch(patch->path(), patch->internal_polyphony());
-	client->polyphonic(patch->path(), patch->polyphonic());
+	client->set_property(patch->path(), "ingen:polyphonic", patch->polyphonic());
 	
 	// Send variable
 	const GraphObjectImpl::Variables& data = patch->variables();
@@ -94,8 +94,8 @@ ObjectSender::send_node(ClientInterface* client, const NodeImpl* node, bool recu
 	
 	client->bundle_begin();
 	
-	client->new_node(node->path(), node->plugin()->uri(), node->polyphonic());
-	client->polyphonic(node->path(), node->polyphonic());
+	client->new_node(node->path(), node->plugin()->uri());
+	client->set_property(node->path(), "ingen:polyphonic", node->polyphonic());
 	
 	// Send variable
 	const GraphObjectImpl::Variables& data = node->variables();
@@ -120,7 +120,7 @@ ObjectSender::send_port(ClientInterface* client, const PortImpl* port)
 	client->bundle_begin();
 
 	client->new_port(port->path(), port->index(), port->type().uri(), port->is_output());
-	client->polyphonic(port->path(), port->polyphonic());
+	client->set_property(port->path(), "ingen:polyphonic", port->polyphonic());
 	
 	// Send variable
 	const GraphObjectImpl::Variables& data = port->variables();
diff --git a/src/libs/engine/QueuedEngineInterface.cpp b/src/libs/engine/QueuedEngineInterface.cpp
index 6deeb727..23b9c77e 100644
--- a/src/libs/engine/QueuedEngineInterface.cpp
+++ b/src/libs/engine/QueuedEngineInterface.cpp
@@ -157,11 +157,10 @@ void QueuedEngineInterface::new_port(const string& path,
 
 void
 QueuedEngineInterface::new_node(const string& path,
-                                const string& plugin_uri,
-                                bool          polyphonic)
+                                const string& plugin_uri)
 {
 	push_queued(new CreateNodeEvent(_engine, _responder, now(),
-		path, plugin_uri, polyphonic));
+		path, plugin_uri, true)); // FIXME: polyphonic by default
 }
 
 
@@ -169,11 +168,10 @@ void
 QueuedEngineInterface::new_node_deprecated(const string& path,
                                            const string& plugin_type,
                                            const string& plugin_lib,
-                                           const string& plugin_label,
-                                           bool          polyphonic)
+                                           const string& plugin_label)
 {
 	push_queued(new CreateNodeEvent(_engine, _responder, now(),
-		path, plugin_type, plugin_lib, plugin_label, polyphonic));
+		path, plugin_type, plugin_lib, plugin_label, true)); // FIXME: polyphonic by default
 }
 
 void
@@ -359,12 +357,21 @@ QueuedEngineInterface::request_port_value(const string& port_path)
 	push_queued(new RequestPortValueEvent(_engine, _responder, now(), port_path));
 }
 
+
 void
 QueuedEngineInterface::request_variable(const string& object_path, const string& key)
 {
-	push_queued(new RequestMetadataEvent(_engine, _responder, now(), object_path, key));
+	push_queued(new RequestMetadataEvent(_engine, _responder, now(), false, object_path, key));
 }
 
+
+void
+QueuedEngineInterface::request_property(const string& object_path, const string& key)
+{
+	push_queued(new RequestMetadataEvent(_engine, _responder, now(), true, object_path, key));
+}
+
+
 void
 QueuedEngineInterface::request_plugins()
 {
diff --git a/src/libs/engine/QueuedEngineInterface.hpp b/src/libs/engine/QueuedEngineInterface.hpp
index 585f1104..6fea3708 100644
--- a/src/libs/engine/QueuedEngineInterface.hpp
+++ b/src/libs/engine/QueuedEngineInterface.hpp
@@ -90,15 +90,13 @@ public:
 	                      bool          direction);
 
 	virtual void new_node(const string& path,
-	                      const string& plugin_uri,
-	                      bool          polyphonic);
+	                      const string& plugin_uri);
 	
 	/** FIXME: DEPRECATED, REMOVE */
 	virtual void new_node_deprecated(const string& path,
 	                                 const string& plugin_type,
 	                                 const string& lib_path,
-	                                 const string& plug_label,
-	                                 bool          polyphonic);
+	                                 const string& plug_label);
 
 	virtual void rename(const string& old_path,
 	                    const string& new_name);
@@ -155,17 +153,12 @@ public:
 	// Requests //
 	
 	virtual void ping();
-
 	virtual void request_plugin(const string& uri);
-
 	virtual void request_object(const string& path);
-	
 	virtual void request_port_value(const string& port_path);
-	
 	virtual void request_variable(const string& object_path, const string& key);
-
+	virtual void request_property(const string& object_path, const string& key);
 	virtual void request_plugins();
-
 	virtual void request_all_objects();
 
 protected:
diff --git a/src/libs/engine/events/RequestMetadataEvent.cpp b/src/libs/engine/events/RequestMetadataEvent.cpp
index 23a3ac7b..733a6a82 100644
--- a/src/libs/engine/events/RequestMetadataEvent.cpp
+++ b/src/libs/engine/events/RequestMetadataEvent.cpp
@@ -28,11 +28,17 @@ using std::string;
 namespace Ingen {
 
 
-RequestMetadataEvent::RequestMetadataEvent(Engine& engine, SharedPtr<Responder> responder, SampleCount timestamp, const string& node_path, const string& key)
-: QueuedEvent(engine, responder, timestamp),
-  _path(node_path),
-  _key(key),
-  _object(NULL)
+RequestMetadataEvent::RequestMetadataEvent(Engine&              engine,
+	                                       SharedPtr<Responder> responder,
+	                                       SampleCount          timestamp,
+	                                       bool                 property,
+	                                       const string&        node_path,
+	                                       const string&        key)
+	: QueuedEvent(engine, responder, timestamp)
+	, _path(node_path)
+	, _property(property)
+	, _key(key)
+	, _object(NULL)
 {
 }
 
@@ -48,7 +54,10 @@ RequestMetadataEvent::pre_process()
 		}
 	}
 
-	_value = _object->get_variable(_key);
+	if (_property)
+		_value = _object->get_property(_key);
+	else
+		_value = _object->get_variable(_key);
 	
 	QueuedEvent::pre_process();
 }
diff --git a/src/libs/engine/events/RequestMetadataEvent.hpp b/src/libs/engine/events/RequestMetadataEvent.hpp
index 71f55399..f6a18dfc 100644
--- a/src/libs/engine/events/RequestMetadataEvent.hpp
+++ b/src/libs/engine/events/RequestMetadataEvent.hpp
@@ -38,13 +38,19 @@ namespace Shared {
 class RequestMetadataEvent : public QueuedEvent
 {
 public:
-	RequestMetadataEvent(Engine& engine, SharedPtr<Responder> responder, SampleCount timestamp, const string& path, const string& key);
+	RequestMetadataEvent(Engine&              engine,
+	                     SharedPtr<Responder> responder,
+	                     SampleCount          timestamp,
+	                     bool                 property,
+	                     const string&        path,
+	                     const string&        key);
 
 	void pre_process();
 	void post_process();
 
 private:
 	string           _path;
+	bool             _property;
 	string           _key;
 	Raul::Atom       _value; 
 	GraphObjectImpl* _object;
diff --git a/src/libs/engine/events/SetPolyphonicEvent.cpp b/src/libs/engine/events/SetPolyphonicEvent.cpp
index bce65ba9..9b7fd980 100644
--- a/src/libs/engine/events/SetPolyphonicEvent.cpp
+++ b/src/libs/engine/events/SetPolyphonicEvent.cpp
@@ -68,7 +68,7 @@ SetPolyphonicEvent::post_process()
 	if (_object) {
 		if (_success) {
 			_responder->respond_ok();
-			_engine.broadcaster()->send_polyphonic(_path, _poly);
+			_engine.broadcaster()->send_property_change(_path, "ingen:polyphonic", _poly);
 		} else {
 			_responder->respond_error("Unable to set object as polyphonic");
 		}
diff --git a/src/libs/engine/events/SetPolyphonyEvent.cpp b/src/libs/engine/events/SetPolyphonyEvent.cpp
index 17222330..eb6550cb 100644
--- a/src/libs/engine/events/SetPolyphonyEvent.cpp
+++ b/src/libs/engine/events/SetPolyphonyEvent.cpp
@@ -68,7 +68,7 @@ SetPolyphonyEvent::post_process()
 {	
 	if (_patch) {
 		_responder->respond_ok();
-		_engine.broadcaster()->send_patch_polyphony(_patch_path, _poly);
+		_engine.broadcaster()->send_property_change(_patch_path, "ingen:polyphony", (int32_t)_poly);
 	} else {
 		_responder->respond_error("Unable to find patch");
 	}
diff --git a/src/libs/gui/ControlPanel.cpp b/src/libs/gui/ControlPanel.cpp
index 0f38d5dd..84f1163a 100644
--- a/src/libs/gui/ControlPanel.cpp
+++ b/src/libs/gui/ControlPanel.cpp
@@ -73,12 +73,12 @@ ControlPanel::init(SharedPtr<NodeModel> node, uint32_t poly)
 		add_port(*i);
 	}
 		
-	node->signal_polyphonic.connect(
-		sigc::mem_fun(this, &ControlPanel::polyphonic_changed));
+	node->signal_property.connect(bind(
+			sigc::mem_fun(this, &ControlPanel::property_changed), false));
 
 	if (node->parent()) {
-		((PatchModel*)node->parent().get())->signal_polyphony.connect(
-				sigc::mem_fun(this, &ControlPanel::polyphony_changed));
+		node->signal_property.connect(bind(
+			sigc::mem_fun(this, &ControlPanel::property_changed), true));
 	} else {
 		cerr << "[ControlPanel] No parent, polyphonic controls disabled" << endl;
 	}
@@ -252,19 +252,16 @@ ControlPanel::specific_voice_selected()
 
 
 void
-ControlPanel::polyphony_changed(uint32_t poly)
+ControlPanel::property_changed(const std::string& predicate, const Raul::Atom& value, bool parent)
 {
-	_voice_spinbutton->set_range(0, poly - 1);
-}
-
-
-void
-ControlPanel::polyphonic_changed(bool poly)
-{
-	if (poly)
-		_voice_control_box->show();
-	else
-		_voice_control_box->hide();
+	if (!parent && predicate == "ingen:polyphonic" && value.type() == Atom::BOOL) {
+		if (value.get_bool())
+			_voice_control_box->show();
+		else
+			_voice_control_box->hide();
+	} else if (parent && predicate == "ingen:polyphony" && value.type() == Atom::INT) {
+		_voice_spinbutton->set_range(0, value.get_int32() - 1);
+	}
 }
 
 	
diff --git a/src/libs/gui/ControlPanel.hpp b/src/libs/gui/ControlPanel.hpp
index 9dded79b..8af5a728 100644
--- a/src/libs/gui/ControlPanel.hpp
+++ b/src/libs/gui/ControlPanel.hpp
@@ -69,8 +69,8 @@ public:
 private:
 	void all_voices_selected();
 	void specific_voice_selected();
-	void polyphony_changed(uint32_t poly);
-	void polyphonic_changed(bool poly);
+	
+	void property_changed(const std::string& predicate, const Raul::Atom& value, bool parent);
 
 	bool _callback_enabled;
 	
diff --git a/src/libs/gui/LoadPluginWindow.cpp b/src/libs/gui/LoadPluginWindow.cpp
index 5aa07c27..92fcb221 100644
--- a/src/libs/gui/LoadPluginWindow.cpp
+++ b/src/libs/gui/LoadPluginWindow.cpp
@@ -345,7 +345,8 @@ LoadPluginWindow::add_clicked()
 			dialog.run();
 		} else {
 			Path path = _patch->path().base() + Path::nameify(name);
-			App::instance().engine()->new_node(path, plugin->uri(), polyphonic);
+			App::instance().engine()->new_node(path, plugin->uri());
+			App::instance().engine()->set_property(path, "ingen:polyphonic", polyphonic);
 			for (GraphObject::Variables::const_iterator i = _initial_data.begin(); i != _initial_data.end(); ++i)
 				App::instance().engine()->set_variable(path, i->first, i->second);
 			_node_name_entry->set_text(generate_module_name(++_plugin_name_offset));
diff --git a/src/libs/gui/NodeModule.cpp b/src/libs/gui/NodeModule.cpp
index 9539c226..fe71dd2f 100644
--- a/src/libs/gui/NodeModule.cpp
+++ b/src/libs/gui/NodeModule.cpp
@@ -47,7 +47,7 @@ NodeModule::NodeModule(boost::shared_ptr<PatchCanvas> canvas, SharedPtr<NodeMode
 	node->signal_new_port.connect(sigc::bind(sigc::mem_fun(this, &NodeModule::add_port), true));
 	node->signal_removed_port.connect(sigc::mem_fun(this, &NodeModule::remove_port));
 	node->signal_variable.connect(sigc::mem_fun(this, &NodeModule::set_variable));
-	node->signal_polyphonic.connect(sigc::mem_fun(this, &NodeModule::set_stacked_border));
+	node->signal_property.connect(sigc::mem_fun(this, &NodeModule::set_property));
 	node->signal_renamed.connect(sigc::mem_fun(this, &NodeModule::rename));
 }
 
@@ -308,5 +308,13 @@ NodeModule::set_variable(const string& key, const Atom& value)
 }
 
 
+void
+NodeModule::set_property(const string& key, const Atom& value)
+{
+	if (key == "ingen:polyphonic" && value.type() == Atom::BOOL)
+		set_stacked_border(value.get_bool());
+}
+
+
 } // namespace GUI
 } // namespace Ingen
diff --git a/src/libs/gui/NodeModule.hpp b/src/libs/gui/NodeModule.hpp
index 4f877b74..3bf2d3eb 100644
--- a/src/libs/gui/NodeModule.hpp
+++ b/src/libs/gui/NodeModule.hpp
@@ -73,6 +73,7 @@ protected:
 	
 	void rename();
 	void set_variable(const std::string& key, const Atom& value);
+	void set_property(const std::string& predicate, const Raul::Atom& value);
 	
 	void add_port(SharedPtr<PortModel> port, bool resize=true);
 	void remove_port(SharedPtr<PortModel> port);
diff --git a/src/libs/gui/ObjectMenu.cpp b/src/libs/gui/ObjectMenu.cpp
index 3a208d51..8f7c3869 100644
--- a/src/libs/gui/ObjectMenu.cpp
+++ b/src/libs/gui/ObjectMenu.cpp
@@ -68,7 +68,7 @@ ObjectMenu::init(SharedPtr<ObjectModel> object)
 	_properties_menuitem->signal_activate().connect(
 			sigc::mem_fun(this, &ObjectMenu::on_menu_properties));
 
-	object->signal_polyphonic.connect(sigc::mem_fun(this, &ObjectMenu::polyphonic_changed));
+	object->signal_property.connect(sigc::mem_fun(this, &ObjectMenu::property_changed));
 
 	_enable_signal = true;
 }
@@ -83,10 +83,11 @@ ObjectMenu::on_menu_polyphonic()
 
 
 void
-ObjectMenu::polyphonic_changed(bool polyphonic)
+ObjectMenu::property_changed(const std::string& predicate, const Raul::Atom& value)
 {
 	_enable_signal = false;
-	_polyphonic_menuitem->set_active(polyphonic);
+	if (predicate == "ingen:polyphonic" && value.type() == Atom::BOOL)
+		_polyphonic_menuitem->set_active(value.get_bool());
 	_enable_signal = true;
 }
 
diff --git a/src/libs/gui/ObjectMenu.hpp b/src/libs/gui/ObjectMenu.hpp
index 712322e3..b5c5bf49 100644
--- a/src/libs/gui/ObjectMenu.hpp
+++ b/src/libs/gui/ObjectMenu.hpp
@@ -51,7 +51,7 @@ protected:
 	void         on_menu_destroy();
 	void         on_menu_properties();
 
-	void polyphonic_changed(bool polyphonic);
+	void property_changed(const std::string& predicate, const Raul::Atom& value);
 
 	bool                   _enable_signal;
 	SharedPtr<ObjectModel> _object;
diff --git a/src/libs/gui/PatchCanvas.cpp b/src/libs/gui/PatchCanvas.cpp
index 77aa64e6..df6ba285 100644
--- a/src/libs/gui/PatchCanvas.cpp
+++ b/src/libs/gui/PatchCanvas.cpp
@@ -627,7 +627,7 @@ PatchCanvas::load_plugin(SharedPtr<PluginModel> plugin)
 		
 	const Path path = _patch->path().base() + name;
 	// FIXME: polyphony?
-	App::instance().engine()->new_node(path, plugin->uri(), false);
+	App::instance().engine()->new_node(path, plugin->uri());
 	GraphObject::Variables data = get_initial_data();
 	for (GraphObject::Variables::const_iterator i = data.begin(); i != data.end(); ++i)
 		App::instance().engine()->set_variable(path, i->first, i->second);
diff --git a/src/libs/gui/PatchPortModule.cpp b/src/libs/gui/PatchPortModule.cpp
index a6192210..75504a91 100644
--- a/src/libs/gui/PatchPortModule.cpp
+++ b/src/libs/gui/PatchPortModule.cpp
@@ -58,8 +58,8 @@ PatchPortModule::PatchPortModule(boost::shared_ptr<PatchCanvas> canvas, SharedPt
 	
 	set_stacked_border(port->polyphonic());
 
-	port->signal_variable.connect(sigc::mem_fun(this, &PatchPortModule::variable_change));
-	port->signal_polyphonic.connect(sigc::mem_fun(this, &PatchPortModule::set_stacked_border));
+	port->signal_variable.connect(sigc::mem_fun(this, &PatchPortModule::set_variable));
+	port->signal_property.connect(sigc::mem_fun(this, &PatchPortModule::set_property));
 }
 
 
@@ -77,7 +77,10 @@ PatchPortModule::create(boost::shared_ptr<PatchCanvas> canvas, SharedPtr<PortMod
 	ret->set_menu(ret->_patch_port->menu());
 	
 	for (GraphObject::Variables::const_iterator m = port->variables().begin(); m != port->variables().end(); ++m)
-		ret->variable_change(m->first, m->second);
+		ret->set_variable(m->first, m->second);
+	
+	for (GraphObject::Variables::const_iterator m = port->properties().begin(); m != port->properties().end(); ++m)
+		ret->set_property(m->first, m->second);
 	
 	ret->resize();
 
@@ -114,7 +117,7 @@ PatchPortModule::store_location()
 
 
 void
-PatchPortModule::variable_change(const string& key, const Atom& value)
+PatchPortModule::set_variable(const string& key, const Atom& value)
 {
 	if (key == "ingenuity:canvas-x" && value.type() == Atom::FLOAT)
 		move_to(value.get_float(), property_y());
@@ -123,5 +126,13 @@ PatchPortModule::variable_change(const string& key, const Atom& value)
 }
 
 
+void
+PatchPortModule::set_property(const string& key, const Atom& value)
+{
+	if (key == "ingen:polyphonic" && value.type() == Atom::BOOL)
+		set_stacked_border(value.get_bool());
+}
+
+
 } // namespace GUI
 } // namespace Ingen
diff --git a/src/libs/gui/PatchPortModule.hpp b/src/libs/gui/PatchPortModule.hpp
index 5e103bbf..bdf9c6d5 100644
--- a/src/libs/gui/PatchPortModule.hpp
+++ b/src/libs/gui/PatchPortModule.hpp
@@ -61,8 +61,10 @@ public:
 protected:
 	PatchPortModule(boost::shared_ptr<PatchCanvas> canvas, SharedPtr<PortModel> port);
 
-	void variable_change(const string& key, const Raul::Atom& value);
 	void create_menu();
+	
+	void set_variable(const std::string& predicate, const Raul::Atom& value);
+	void set_property(const std::string& predicate, const Raul::Atom& value);
 
 	SharedPtr<PortModel> _port;
 	PortMenu*            _menu;
diff --git a/src/libs/serialisation/Parser.cpp b/src/libs/serialisation/Parser.cpp
index 8bd9bcbb..cd132b3a 100644
--- a/src/libs/serialisation/Parser.cpp
+++ b/src/libs/serialisation/Parser.cpp
@@ -152,7 +152,8 @@ Parser::parse(Ingen::Shared::World*           world,
 			if (poly_node.is_bool() && poly_node.to_bool() == true)
 				node_polyphonic = true;
 		
-			target->new_node(node_path, node_plugin, node_polyphonic);
+			target->new_node(node_path, node_plugin);
+			target->set_property(node_path, "ingen:polyphonic", node_polyphonic);
 			created.insert(node_path);
 		}