diff --git a/Source/PluginProcessor.cpp b/Source/PluginProcessor.cpp
index a622d3b..df3468e 100644
--- a/Source/PluginProcessor.cpp
+++ b/Source/PluginProcessor.cpp
@@ -467,6 +467,8 @@ String PaulstretchpluginAudioProcessor::offlineRender(File outputfile)
 	File outputfiletouse = outputfile.getNonexistentSibling();
 	int numoutchans = *getIntParameter(cpi_num_outchans);
 	auto ss = std::make_shared<StretchAudioSource>(numoutchans,m_afm,m_sm_enab_pars);
+	shared_envelope free_env = m_free_filter_envelope->duplicate();
+	ss->setFreeFilterEnvelope(free_env);
 	int blocksize = 2048;
 	
 	ss->setAudioFile(m_current_file);
diff --git a/Source/jcdp_envelope.h b/Source/jcdp_envelope.h
index 5ef04a3..cac13b0 100644
--- a/Source/jcdp_envelope.h
+++ b/Source/jcdp_envelope.h
@@ -208,6 +208,15 @@ public:
         m_value_grid={0.0,0.25,0.5,0.75,1.0};
 		m_randbuf.resize(1024);
     }
+	std::unique_ptr<breakpoint_envelope> duplicate()
+	{
+		auto result = std::make_unique<breakpoint_envelope>();
+		result->m_nodes = m_nodes;
+		result->m_randbuf = m_randbuf;
+		result->m_transform_wrap_x = m_transform_wrap_x;
+		result->m_transform_x_shift = m_transform_x_shift;
+		return result;
+	}
 
 
     void SetName(String Name) { m_name=Name; }