3 files changed, 18 insertions, 10 deletions
diff --git a/src/libs/engine/LV2Node.cpp b/src/libs/engine/LV2Node.cpp
index c8c13f38..146bc4bf 100644
--- a/src/libs/engine/LV2Node.cpp
+++ b/src/libs/engine/LV2Node.cpp
@@ -43,9 +43,11 @@ LV2Node::LV2Node(const Plugin*      plugin,
                  Patch*             parent,
                  SampleRate         srate,
                  size_t             buffer_size)
-: NodeBase(plugin, name, poly, parent, srate, buffer_size),
-  _lv2_plugin(plugin->slv2_plugin()),
-  _instances(NULL)
+	: NodeBase(plugin, name, poly, parent, srate, buffer_size)
+	, _lv2_plugin(plugin->slv2_plugin())
+	, _instances(NULL)
+	, _prepared_instances(NULL)
+	, _prepared_poly(poly)
 {
 	assert(_lv2_plugin);
 }
@@ -83,13 +85,15 @@ LV2Node::apply_poly(Raul::Maid& maid, uint32_t poly)
 
 	NodeBase::apply_poly(maid, poly);
 	
-	maid.push(_instances);
-	_instances = _prepared_instances;
-	
-	for (uint32_t port=0; port < num_ports(); ++port)
-		for (uint32_t voice = _polyphony; voice < _prepared_poly; ++voice)
-			slv2_instance_connect_port((*_instances)[voice], port,
-					_ports->at(port)->buffer(voice)->raw_data());
+	if (_prepared_instances) {
+		maid.push(_instances);
+		_instances = _prepared_instances;
+
+		for (uint32_t port=0; port < num_ports(); ++port)
+			for (uint32_t voice = _polyphony; voice < _prepared_poly; ++voice)
+				slv2_instance_connect_port((*_instances)[voice], port,
+						_ports->at(port)->buffer(voice)->raw_data());
+	}
 
 	_polyphony = poly;
 	_prepared_instances = NULL;
diff --git a/src/libs/engine/MidiNoteNode.cpp b/src/libs/engine/MidiNoteNode.cpp
index 91c9d542..03dc01b3 100644
--- a/src/libs/engine/MidiNoteNode.cpp
+++ b/src/libs/engine/MidiNoteNode.cpp
@@ -38,6 +38,8 @@ namespace Ingen {
 MidiNoteNode::MidiNoteNode(const string& path, uint32_t poly, Patch* parent, SampleRate srate, size_t buffer_size)
 : InternalNode(new Plugin(Plugin::Internal, "ingen:note_node"), path, poly, parent, srate, buffer_size),
   _voices(new Raul::Array<Voice>(poly)),
+  _prepared_voices(NULL),
+  _prepared_poly(poly),
   _sustain(false)
 {
 	_ports = new Raul::Array<Port*>(5);
diff --git a/src/libs/engine/Patch.cpp b/src/libs/engine/Patch.cpp
index 77b043eb..3d8e7756 100644
--- a/src/libs/engine/Patch.cpp
+++ b/src/libs/engine/Patch.cpp
@@ -129,6 +129,8 @@ Patch::apply_internal_poly(Raul::Maid& maid, uint32_t poly)
 
 	for (Raul::List<Node*>::iterator i = _nodes.begin(); i != _nodes.end(); ++i)
 		(*i)->apply_poly(maid, poly);
+
+	_internal_poly = poly;
 	
 	return true;
 }