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diff --git a/externals/grill/flext/tutorial/sndobj1/main.cpp b/externals/grill/flext/tutorial/sndobj1/main.cpp
new file mode 100644
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+++ b/externals/grill/flext/tutorial/sndobj1/main.cpp
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+// signal1~ - a flext tutorial external written by Frank Barknecht
+// 
+// This is a commented port of the pan~ example from the PD-Externals-Howto to
+// illustrate the usage of flext. You can get the original code at
+// http://iem.kug.ac.at/pd/externals-HOWTO/
+
+#define FLEXT_ATTRIBUTES 1
+
+#include <flsndobj.h>
+ 
+#if !defined(FLEXT_VERSION) || (FLEXT_VERSION < 401)
+#error You need at least flext version 0.4.1
+#endif
+
+
+class sndobj1:
+	public flext_sndobj
+{
+	FLEXT_HEADER(sndobj1,flext_sndobj)
+
+public:
+	sndobj1();
+
+protected:
+
+	// these are obligatory!
+	virtual void NewObjs();
+	virtual void FreeObjs();
+	virtual void ProcessObjs();
+
+	// space for a few sndobjs
+	Pitch *obj1,*obj2;
+
+	float sh1,sh2;
+
+	FLEXT_ATTRVAR_F(sh1)
+	FLEXT_ATTRVAR_F(sh2)
+};
+
+FLEXT_NEW_DSP("sndobj1~",sndobj1)
+
+
+sndobj1::sndobj1():
+	sh1(1),sh2(1)
+{ 
+	AddInSignal(2);  // audio ins
+	AddOutSignal(2);  // audio outs
+
+	obj1 = obj2 = NULL;
+
+	FLEXT_ADDATTR_VAR1("shL",sh1);
+	FLEXT_ADDATTR_VAR1("shR",sh2);
+}
+
+// construct needed SndObjs
+void sndobj1::NewObjs()
+{
+	// set up objects
+	obj1 = new Pitch(.1f,&InObj(0),sh1,Blocksize(),Samplerate());
+	obj2 = new Pitch(.1f,&InObj(1),sh2,Blocksize(),Samplerate());
+}
+
+// destroy the SndObjs
+void sndobj1::FreeObjs()
+{
+	if(obj1) delete obj1;
+	if(obj2) delete obj2;
+}
+
+// this is called on every DSP block
+void sndobj1::ProcessObjs()
+{
+	// set current pitch shift
+	obj1->SetPitch(sh1);
+	obj2->SetPitch(sh2);
+
+	// do processing here!!
+	obj1->DoProcess();
+	obj2->DoProcess();
+
+	// output
+	*obj1 >> OutObj(0);
+	*obj2 >> OutObj(1);
+}
+