diff --git a/src/effects/Biquad.cpp b/src/effects/Biquad.cpp
index 8a0442a69..4a79567a1 100644
--- a/src/effects/Biquad.cpp
+++ b/src/effects/Biquad.cpp
@@ -4,25 +4,25 @@
 
 void Biquad_Process (BiquadStruct* pBQ, int iNumSamples)
 {
-	float* pfIn = pBQ->pfIn;
-	float* pfOut = pBQ->pfOut;
+   float* pfIn = pBQ->pfIn;
+   float* pfOut = pBQ->pfOut;
    float fPrevIn = pBQ->fPrevIn;
    float fPrevPrevIn = pBQ->fPrevPrevIn;
    float fPrevOut = pBQ->fPrevOut;
    float fPrevPrevOut = pBQ->fPrevPrevOut;
-	for (int i = 0; i < iNumSamples; i++)
-	{
-		float fIn = *pfIn++;
-		*pfOut = fIn * pBQ->fNumerCoeffs [0] +
-			fPrevIn * pBQ->fNumerCoeffs [1] +
-			fPrevPrevIn * pBQ->fNumerCoeffs [2] -
-			fPrevOut * pBQ->fDenomCoeffs [0] -
-			fPrevPrevOut * pBQ->fDenomCoeffs [1];
-		fPrevPrevIn = fPrevIn;
-		fPrevIn = fIn;
-		fPrevPrevOut = fPrevOut;
-		fPrevOut = *pfOut++;
-	}
+   for (int i = 0; i < iNumSamples; i++)
+   {
+      float fIn = *pfIn++;
+      *pfOut = fIn * pBQ->fNumerCoeffs [0] +
+         fPrevIn * pBQ->fNumerCoeffs [1] +
+         fPrevPrevIn * pBQ->fNumerCoeffs [2] -
+         fPrevOut * pBQ->fDenomCoeffs [0] -
+         fPrevPrevOut * pBQ->fDenomCoeffs [1];
+      fPrevPrevIn = fPrevIn;
+      fPrevIn = fIn;
+      fPrevPrevOut = fPrevOut;
+      fPrevOut = *pfOut++;
+   }
    pBQ->fPrevIn = fPrevIn;
    pBQ->fPrevPrevIn = fPrevPrevIn;
    pBQ->fPrevOut = fPrevOut;
@@ -38,14 +38,14 @@ void ComplexDiv (float fNumerR, float fNumerI, float fDenomR, float fDenomI, flo
 
 bool BilinTransform (float fSX, float fSY, float* pfZX, float* pfZY)
 {
-	float fDenom = square (1 - fSX) + square (fSY);
-	*pfZX = (1 - square (fSX) - square (fSY)) / fDenom;
-	*pfZY = 2 * fSY / fDenom;
-	return true;
+   float fDenom = square (1 - fSX) + square (fSY);
+   *pfZX = (1 - square (fSX) - square (fSY)) / fDenom;
+   *pfZY = 2 * fSY / fDenom;
+   return true;
 }
 
 float Calc2D_DistSqr (float fX1, float fY1, float fX2, float fY2)
 {
-	return square (fX1 - fX2) + square (fY1 - fY2);
+   return square (fX1 - fX2) + square (fY1 - fY2);
 }
 
diff --git a/src/effects/Biquad.h b/src/effects/Biquad.h
index 45a27a3cd..5115f46ad 100644
--- a/src/effects/Biquad.h
+++ b/src/effects/Biquad.h
@@ -1,14 +1,14 @@
 #ifndef __BIQUAD_H__
 #define __BIQUAD_H__
 typedef struct {
-	float* pfIn;
-	float* pfOut;
-	float fNumerCoeffs [3];	// B0 B1 B2
-	float fDenomCoeffs [2];	// A1 A2
-	float fPrevIn;
-	float fPrevPrevIn;
-	float fPrevOut;
-	float fPrevPrevOut;
+   float* pfIn;
+   float* pfOut;
+   float fNumerCoeffs [3];	// B0 B1 B2
+   float fDenomCoeffs [2];	// A1 A2
+   float fPrevIn;
+   float fPrevPrevIn;
+   float fPrevOut;
+   float fPrevPrevOut;
 } BiquadStruct;
 void Biquad_Process (BiquadStruct* pBQ, int iNumSamples);
 void ComplexDiv (float fNumerR, float fNumerI, float fDenomR, float fDenomI, float* pfQuotientR, float* pfQuotientI);
diff --git a/src/effects/ScienFilter.h b/src/effects/ScienFilter.h
index 6f0d116d0..f40b1c3fe 100644
--- a/src/effects/ScienFilter.h
+++ b/src/effects/ScienFilter.h
@@ -1,12 +1,12 @@
 /**********************************************************************
 
-  Audacity: A Digital Audio Editor
+Audacity: A Digital Audio Editor
 
-  EffectScienFilter.h
+EffectScienFilter.h
 
-  Norm C
-  Mitch Golden
-  Vaughan Johnson (Preview)
+Norm C
+Mitch Golden
+Vaughan Johnson (Preview)
 
 ***********************************************************************/
 
@@ -69,7 +69,7 @@ public:
    virtual bool PromptUser();
    virtual bool DontPromptUser();
    virtual bool TransferParameters( Shuttle & shuttle );
-	bool CalcFilterCoeffs (void);
+   bool CalcFilterCoeffs (void);
 
    virtual bool Process();
 
@@ -78,10 +78,10 @@ public:
 
 private:
    bool ProcessOne(int count, WaveTrack * t,
-                   sampleCount start, sampleCount len);
+      sampleCount start, sampleCount len);
 
    void Filter(sampleCount len,
-               float *buffer);
+      float *buffer);
    void ReadPrefs();
 
    //int mM;
@@ -101,8 +101,8 @@ private:
 
 public:
 
-friend class ScienFilterDialog;
-friend class ScienFilterPanel;
+   friend class ScienFilterDialog;
+   friend class ScienFilterPanel;
 };
 
 
@@ -110,15 +110,15 @@ class ScienFilterPanel: public wxPanel
 {
 public:
    ScienFilterPanel( double loFreq, double hiFreq,
-               ScienFilterDialog *parent,
-               wxWindowID id,
-               const wxPoint& pos = wxDefaultPosition,
-               const wxSize& size = wxDefaultSize);
+      ScienFilterDialog *parent,
+      wxWindowID id,
+      const wxPoint& pos = wxDefaultPosition,
+      const wxSize& size = wxDefaultSize);
    ~ScienFilterPanel();
 
 #if 0
-Needed only if user can draw in the graph
-   void OnMouseEvent(wxMouseEvent & event);
+   Needed only if user can draw in the graph
+      void OnMouseEvent(wxMouseEvent & event);
    void OnCaptureLost(wxMouseCaptureLostEvent & event);
 #endif
    void OnPaint(wxPaintEvent & event);
@@ -156,13 +156,13 @@ class ScienFilterDialog: public wxDialog //, public XMLTagHandler
 public:
    // constructors and destructors
    ScienFilterDialog(EffectScienFilter * effect,
-               double loFreq, double hiFreq,
-               //long windowSize, wxString CurveName, bool disallowCustom,
-               wxWindow *parent, wxWindowID id,
-               const wxString &title,
-               const wxPoint& pos = wxDefaultPosition,
-               const wxSize& size = wxDefaultSize,
-               long style = wxDEFAULT_DIALOG_STYLE );
+      double loFreq, double hiFreq,
+      //long windowSize, wxString CurveName, bool disallowCustom,
+      wxWindow *parent, wxWindowID id,
+      const wxString &title,
+      const wxPoint& pos = wxDefaultPosition,
+      const wxSize& size = wxDefaultSize,
+      long style = wxDEFAULT_DIALOG_STYLE );
    ~ScienFilterDialog();
 
    // WDR: method declarations for ScienFilterDialog
@@ -170,7 +170,7 @@ public:
    virtual bool TransferDataToWindow();
    virtual bool TransferGraphLimitsFromWindow();
    virtual bool CalcFilter(EffectScienFilter* effect);
-	float FilterMagnAtFreq (float Freq);
+   float FilterMagnAtFreq (float Freq);
 
    wxChoice* mFilterTypeCtl;
    wxChoice* mFilterSubTypeCtl;