diff --git a/src/blacksound/dsp/SimpleGate.h b/src/blacksound/dsp/SimpleGate.h
index 441e28675..ca5d1d3e5 100644
--- a/src/blacksound/dsp/SimpleGate.h
+++ b/src/blacksound/dsp/SimpleGate.h
@@ -1,101 +1,110 @@
 /*
- *	Simple Gate (header)
+ *  Simple Gate (header)
  *
- *  File		: SimpleGate.h
- *	Library		: SimpleSource
- *  Version		: 1.12
- *  Class		: SimpleGate, SimpleGateRms
+ *  File        : SimpleGate.h
+ *  Library     : SimpleSource
+ *  Version     : 1.12
+ *  Class       : SimpleGate, SimpleGateRms
  *
- *	2006, ChunkWare Music Software, OPEN-SOURCE
+ *  2006, ChunkWare Music Software, OPEN-SOURCE
  *
- *	Permission is hereby granted, free of charge, to any person obtaining a
- *	copy of this software and associated documentation files (the "Software"),
- *	to deal in the Software without restriction, including without limitation
- *	the rights to use, copy, modify, merge, publish, distribute, sublicense,
- *	and/or sell copies of the Software, and to permit persons to whom the
- *	Software is furnished to do so, subject to the following conditions:
+ *  Permission is hereby granted, free of charge, to any person obtaining a
+ *  copy of this software and associated documentation files (the "Software"),
+ *  to deal in the Software without restriction, including without limitation
+ *  the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ *  and/or sell copies of the Software, and to permit persons to whom the
+ *  Software is furnished to do so, subject to the following conditions:
  *
- *	The above copyright notice and this permission notice shall be included in
- *	all copies or substantial portions of the Software.
+ *  The above copyright notice and this permission notice shall be included in
+ *  all copies or substantial portions of the Software.
  *
- *	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- *	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- *	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- *	THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- *	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- *	FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- *	DEALINGS IN THE SOFTWARE.
+ *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ *  DEALINGS IN THE SOFTWARE.
  */
 
 
 #ifndef __SIMPLE_GATE_H__
 #define __SIMPLE_GATE_H__
 
-#include "SimpleHeader.h"		// common header
-#include "SimpleEnvelope.h"		// for base class
-#include "SimpleGain.h"			// for gain functions
+#include "SimpleHeader.h"       // common header
+#include "SimpleEnvelope.h"     // for base class
+#include "SimpleGain.h"         // for gain functions
 
 namespace chunkware_simple
 {
-	//-------------------------------------------------------------
-	// simple gate
-	//-------------------------------------------------------------
-	class SimpleGate : public AttRelEnvelope
-	{
-	public:
-		SimpleGate();
-		virtual ~SimpleGate() {}
+    //! simple gate
+    class SimpleGate : public AttRelEnvelope
+    {
+    public:
+        //! Constructor
+        SimpleGate();
 
-		// parameters
-		virtual void   setThresh( double dB );
-		virtual double getThresh( void ) const { return threshdB_; }
-		
-		// runtime
-		virtual void initRuntime( void );			// call before runtime (in resume())
-		void process( double &in1, double &in2 );	// gate runtime process
-		void process( double &in1, double &in2, double keyLinked );	// with stereo-linked key in
-		
-	private:
-		
-		// transfer function
-		double threshdB_;	// threshold (dB)
-		double thresh_;		// threshold (linear)
-		
-		// runtime variables
-		double env_;		// over-threshold envelope (linear)
-		
-	};	// end SimpleGate class
+        //! Destructor
+        virtual ~SimpleGate() {}
 
-	//-------------------------------------------------------------
-	// simple gate with RMS detection
-	//-------------------------------------------------------------
-	class SimpleGateRms : public SimpleGate
-	{
-	public:
-		SimpleGateRms();
-		virtual ~SimpleGateRms() {}
+        //! set threshold
+        virtual void   setThresh(double dB);
 
-		// sample rate
-		virtual void setSampleRate( double sampleRate );
+        //! get threshold
+        virtual double getThresh(void) const { return threshdB_; }
 
-		// RMS window
-		virtual void setWindow( double ms );
-		virtual double getWindow( void ) const { return ave_.getTc(); }
+        // init runtime
+        virtual void initRuntime(void);              // call before runtime (in resume())
 
-		// runtime process
-		virtual void initRuntime( void );			// call before runtime (in resume())
-		void process( double &in1, double &in2 );	// gate runtime process
+        //! Process audio
+        void process(double &in1, double &in2);      // gate runtime process
 
-	private:
+        //! Process audio stereo-linked
+        void process(double &in1, double &in2, double keyLinked);    // with stereo-linked key in
 
-		EnvelopeDetector ave_;	// averager
-		double aveOfSqrs_;		// average of squares
+    private:
+        // transfer function
+        double threshdB_;   //!< threshold (dB)
+        double thresh_;     //!< threshold (linear)
 
-	};	// end SimpleGateRms class
+        // runtime variables
+        double env_;        //!< over-threshold envelope (linear)
+    };
 
-}	// end namespace chunkware_simple
+    //! simple gate with RMS detection
+    class SimpleGateRms : public SimpleGate
+    {
+    public:
+        //! Constructor
+        SimpleGateRms();
+
+        //! Destructor
+        virtual ~SimpleGateRms() {}
+
+        //! set sample rate
+        virtual void setSampleRate(double sampleRate);
+
+        //! set RMS window
+        virtual void setWindow(double ms);
+
+        //! get RMS window
+        virtual double getWindow(void) const { return ave_.getTc(); }
+
+        //! \copydoc SimpleGate::initRuntime
+        virtual void initRuntime(void);              // call before runtime (in resume())
+
+        //! \copydoc SimpleGate::process
+        void process(double &in1, double &in2);      // gate runtime process
+
+    private:
+        EnvelopeDetector ave_;  //!< averager
+        double aveOfSqrs_;      //!< average of squares
+
+    };  // end SimpleGateRms class
+
+}   // end namespace chunkware_simple
 
 // include inlined process function
 #include "SimpleGateProcess.inl"
 
-#endif	// end __SIMPLE_GATE_H__
+#endif  // end __SIMPLE_GATE_H__