=== modified file 'mixxx/src/engine/enginefilterblock.cpp'
--- mixxx/src/engine/enginefilterblock.cpp	2012-07-04 05:37:09 +0000
+++ mixxx/src/engine/enginefilterblock.cpp	2012-12-27 13:52:20 +0000
@@ -15,8 +15,6 @@
 *                                                                         *
 ***************************************************************************/
 
-#include <QtDebug>
-
 #include "engine/enginefilterblock.h"
 
 #include "controllogpotmeter.h"
@@ -27,6 +25,8 @@
 #include "engine/enginestate.h"
 #include "sampleutil.h"
 
+#include "engine/engineasync.h"
+
 EngineFilterBlock::EngineFilterBlock(const char * group,
                                      EngineState* pEngineState) {
     ilowFreq = 0;
@@ -118,6 +118,8 @@
     memset(m_pTemp1, 0, sizeof(CSAMPLE) * MAX_BUFFER_LEN);
     memset(m_pTemp2, 0, sizeof(CSAMPLE) * MAX_BUFFER_LEN);
     memset(m_pTemp3, 0, sizeof(CSAMPLE) * MAX_BUFFER_LEN);
+
+    m_lowCur = 0.f;
 }
 
 EngineFilterBlock::~EngineFilterBlock()
@@ -177,17 +179,19 @@
     if (filterKillHigh->get()==0.)
         fHigh = filterpotHigh->get(); //*1.2;
 
+
 #ifndef __LOFI__
     setFilters();
 #endif
 
+
     low->process(pIn, m_pTemp1, iBufferSize);
     band->process(pIn, m_pTemp2, iBufferSize);
     high->process(pIn, m_pTemp3, iBufferSize);
 
-    SampleUtil::copy3WithGain(pOutput,
-                              m_pTemp1, fLow,
-                              m_pTemp2, fMid,
-                              m_pTemp3, fHigh, iBufferSize);
+    SampleUtil::rampCopy3WithGain(pOutput,
+		    m_pTemp1, &m_lowCur, fLow,
+		    m_pTemp2, fMid,
+		    m_pTemp3, fHigh, iBufferSize);
 }
 

=== modified file 'mixxx/src/engine/enginefilterblock.h'
--- mixxx/src/engine/enginefilterblock.h	2012-07-04 05:37:09 +0000
+++ mixxx/src/engine/enginefilterblock.h	2012-12-27 13:50:21 +0000
@@ -61,6 +61,8 @@
 
     int ilowFreq, ihighFreq;
     bool blofi;
+
+    CSAMPLE m_lowCur;
 };
 
 #endif

=== modified file 'mixxx/src/sampleutil.cpp'
--- mixxx/src/sampleutil.cpp	2011-12-08 11:47:54 +0000
+++ mixxx/src/sampleutil.cpp	2012-12-27 13:19:02 +0000
@@ -443,6 +443,30 @@
 }
 
 // static
+void SampleUtil::rampCopy3WithGain(CSAMPLE* pDest,
+                              const CSAMPLE* pSrc1, CSAMPLE *curGain1, CSAMPLE gain1,
+                              const CSAMPLE* pSrc2, CSAMPLE gain2,
+                              const CSAMPLE* pSrc3, CSAMPLE gain3,
+                	      int iNumSamples) {
+    
+    CSAMPLE a, da;
+	a = *curGain1;
+	da = 0.f;
+	if (*curGain1 != gain1)
+	{
+		da = (CSAMPLE) (gain1 - a)/iNumSamples;
+	}
+
+    for (int i = 0; i < iNumSamples; ++i) {
+		a += da;
+        pDest[i] = pSrc1[i] * a + pSrc2[i] * gain2 + pSrc3[i] * gain3;
+    }
+    
+	// update  current gain of the calling instance
+	*curGain1 = a;
+}
+
+// static
 void SampleUtil::sseCopy3WithGain(CSAMPLE* pDest,
                                   const CSAMPLE* pSrc1, CSAMPLE gain1,
                                   const CSAMPLE* pSrc2, CSAMPLE gain2,

=== modified file 'mixxx/src/sampleutil.h'
--- mixxx/src/sampleutil.h	2012-04-08 02:31:42 +0000
+++ mixxx/src/sampleutil.h	2012-12-27 12:00:33 +0000
@@ -87,6 +87,11 @@
                               const CSAMPLE* pSrc3, CSAMPLE gain3,
                               int iNumSamples);
 
+    static void rampCopy3WithGain(CSAMPLE* pDest,
+                             const CSAMPLE* pSrc1, CSAMPLE *curGain1, CSAMPLE gain1,
+                             const CSAMPLE* pSrc2, CSAMPLE gain2,
+                             const CSAMPLE* pSrc3, CSAMPLE gain3,
+                             int iNumSamples);							 
     // Copies the sum of each channel, multiplied by its gain into pDest
     static void copy4WithGain(CSAMPLE* pDest,
                               const CSAMPLE* pSrc1, CSAMPLE gain1,