diff --git a/include/basic_filters.h b/include/basic_filters.h
index e41046e61..4ba03f110 100644
--- a/include/basic_filters.h
+++ b/include/basic_filters.h
@@ -315,7 +315,7 @@ public:
 
 			case Formantfilter:
 			{
-				sample_t lp, hp, bp, in;
+				sample_t hp, bp, in;
 
 		out = 0;
 		for(int o=0; o<4; o++)
@@ -325,10 +325,6 @@ public:
 			in = (in > +1.f) ? +1.f : in;
 			in = (in < -1.f) ? -1.f : in;
 
-			lp = in * m_vfb[0] + m_vflp[0][_chnl] * m_vfa[0];
-			lp = (lp > +1.f) ? +1.f : lp;
-			lp = (lp < -1.f) ? -1.f : lp;
-
 			hp = m_vfc[0] * ( m_vfhp[0][_chnl] + in - m_vflast[0][_chnl] );
 			hp = (hp > +1.f) ? +1.f : hp;
 			hp = (hp < -1.f) ? -1.f : hp;
@@ -338,7 +334,6 @@ public:
 			bp = (bp < -1.f) ? -1.f : bp;
 
 			m_vflast[0][_chnl] = in;
-			m_vflp[0][_chnl] = lp;
 			m_vfhp[0][_chnl] = hp;
 			m_vfbp[0][_chnl] = bp;
 
@@ -346,10 +341,6 @@ public:
 			in = (in > +1.f) ? +1.f : in;
 			in = (in < -1.f) ? -1.f : in;
 
-			lp = in * m_vfb[0] + m_vflp[2][_chnl] * m_vfa[0];
-			lp = (lp > +1.f) ? +1.f : lp;
-			lp = (lp < -1.f) ? -1.f : lp;
-
 			hp = m_vfc[0] * ( m_vfhp[2][_chnl] + in - m_vflast[2][_chnl] );
 			hp = (hp > +1.f) ? +1.f : hp;
 			hp = (hp < -1.f) ? -1.f : hp;
@@ -359,7 +350,6 @@ public:
 			bp = (bp < -1.f) ? -1.f : bp;
 
 			m_vflast[2][_chnl] = in;
-			m_vflp[2][_chnl] = lp;
 			m_vfhp[2][_chnl] = hp;
 			m_vfbp[2][_chnl] = bp;  
 			      
@@ -367,10 +357,6 @@ public:
 			in = (in > +1.f) ? +1.f : in;
 			in = (in < -1.f) ? -1.f : in;
 
-			lp = in * m_vfb[0] + m_vflp[4][_chnl] * m_vfa[0];
-			lp = (lp > +1.f) ? +1.f : lp;
-			lp = (lp < -1.f) ? -1.f : lp;
-
 			hp = m_vfc[0] * ( m_vfhp[4][_chnl] + in - m_vflast[4][_chnl] );
 			hp = (hp > +1.f) ? +1.f : hp;
 			hp = (hp < -1.f) ? -1.f : hp;
@@ -380,7 +366,6 @@ public:
 			bp = (bp < -1.f) ? -1.f : bp;
 
 			m_vflast[4][_chnl] = in;
-			m_vflp[4][_chnl] = lp;
 			m_vfhp[4][_chnl] = hp;
 			m_vfbp[4][_chnl] = bp;  
 
@@ -391,10 +376,6 @@ public:
 			in = (in > +1.f) ? +1.f : in;
 			in = (in < -1.f) ? -1.f : in;
 
-			lp = in * m_vfb[1] + m_vflp[1][_chnl] * m_vfa[1];
-			lp = (lp > +1.f) ? +1.f : lp;
-			lp = (lp < -1.f) ? -1.f : lp;
-
 			hp = m_vfc[1] * ( m_vfhp[1][_chnl] + in - m_vflast[1][_chnl] );
 			hp = (hp > +1.f) ? +1.f : hp;
 			hp = (hp < -1.f) ? -1.f : hp;
@@ -404,7 +385,6 @@ public:
 			bp = (bp < -1.f) ? -1.f : bp;
 
 			m_vflast[1][_chnl] = in;
-			m_vflp[1][_chnl] = lp;
 			m_vfhp[1][_chnl] = hp;
 			m_vfbp[1][_chnl] = bp;
 
@@ -412,10 +392,6 @@ public:
 			in = (in > +1.f) ? +1.f : in;
 			in = (in < -1.f) ? -1.f : in;
 
-			lp = in * m_vfb[1] + m_vflp[3][_chnl] * m_vfa[1];
-			lp = (lp > +1.f) ? +1.f : lp;
-			lp = (lp < -1.f) ? -1.f : lp;
-
 			hp = m_vfc[1] * ( m_vfhp[3][_chnl] + in - m_vflast[3][_chnl] );
 			hp = (hp > +1.f) ? +1.f : hp;
 			hp = (hp < -1.f) ? -1.f : hp;
@@ -425,7 +401,6 @@ public:
 			bp = (bp < -1.f) ? -1.f : bp;
 
 			m_vflast[3][_chnl] = in;
-			m_vflp[3][_chnl] = lp;
 			m_vfhp[3][_chnl] = hp;
 			m_vfbp[3][_chnl] = bp;  
 
@@ -433,10 +408,6 @@ public:
 			in = (in > +1.f) ? +1.f : in;
 			in = (in < -1.f) ? -1.f : in;
 
-			lp = in * m_vfb[1] + m_vflp[5][_chnl] * m_vfa[1];
-			lp = (lp > +1.f) ? +1.f : lp;
-			lp = (lp < -1.f) ? -1.f : lp;
-
 			hp = m_vfc[1] * ( m_vfhp[5][_chnl] + in - m_vflast[5][_chnl] );
 			hp = (hp > +1.f) ? +1.f : hp;
 			hp = (hp < -1.f) ? -1.f : hp;
@@ -446,7 +417,6 @@ public:
 			bp = (bp < -1.f) ? -1.f : bp;
 
 			m_vflast[5][_chnl] = in;
-			m_vflp[5][_chnl] = lp;
 			m_vfhp[5][_chnl] = hp;
 			m_vfbp[5][_chnl] = bp;