Index: libs/libmythfreesurround/el_processor.cpp
===================================================================
--- libs/libmythfreesurround/el_processor.cpp	(revision 19025)
+++ libs/libmythfreesurround/el_processor.cpp	(working copy)
@@ -40,18 +40,8 @@
 
 const float PI = 3.141592654;
 const float epsilon = 0.000001;
-//const float center_level = 0.5*sqrt(0.5);   // gain of the center channel
-//const float center_level = sqrt(0.5);   // gain of the center channel
-const float center_level = 1.0;   // gain of the center channel
-//const float center_level = 0.5;   // gain of the center channel
+const float center_level = 0.5*sqrt(0.5);
 
-// should be .6-.7
-// but with centerlevel 2x what its supposed to be, we halve 0.68
-// to keep center from clipping
-//const float window_gain = 0.34;     
-//const float window_gain = 0.68;     
-const float window_gain = 0.95;     // to prive a bit of margin
-
 // private implementation of the surround decoder
 class decoder_impl {
 public:
@@ -98,19 +88,11 @@
             outbuf[c].resize(N);
             filter[c].resize(N);
         }
-        // DC component of filters is always 0
-        for (unsigned c=0;c<5;c++)
-        {
-            filter[c][0] = 0.0;
-            filter[c][1] = 0.0;
-            filter[c][halfN] = 0.0;
-        }
         sample_rate(48000);
         // generate the window function (square root of hann, b/c it is applied before and after the transform)
         wnd.resize(N);
-        // dft normalization included in the window for zero cost scaling
-        // also add a gain factor of *2 due to processing gain in algo (see center_level)
-        surround_gain(1.0);
+        for (unsigned k=0;k<N;k++)
+            wnd[k] = sqrt(0.5*(1-cos(2*PI*k/N))/N);
         current_buf = 0;
         // set the default coefficients
         surround_coefficients(0.8165,0.5774);
@@ -192,10 +174,10 @@
     // set lfe filter params
     void sample_rate(unsigned int srate) {
         // lfe filter is just straight through band limited
-        unsigned int cutoff = (250*N)/srate;
+        unsigned int cutoff = (30*N)/srate;
         for (unsigned f=0;f<=halfN;f++) {           
-            if ((f>=2) && (f<cutoff))
-                filter[5][f] = 1.0;
+            if (f<cutoff)
+                filter[5][f] = 0.5*sqrt(0.5);
             else
                 filter[5][f] = 0.0;
         }
@@ -214,12 +196,6 @@
         E = (o+v)*n; F = (o+u)*n; G = (o-v)*n;  H = (o-u)*n;
     }
 
-    void surround_gain(float gain) {
-        master_gain = gain * window_gain * 0.5 * 0.25;
-        for (unsigned k=0;k<N;k++)
-            wnd[k] = sqrt(master_gain*(1-cos(2*PI*k/N))/N);
-    }
-
     // set the phase shifting mode
     void phase_mode(unsigned mode) {
         const float modes[4][2] = {{0,0},{0,PI},{PI,0},{-PI/2,PI/2}};
@@ -290,7 +266,7 @@
 
         // 2. compare amplitude and phase of each DFT bin and produce the X/Y coordinates in the sound field
         //    but dont do DC or N/2 component
-        for (unsigned f=2;f<halfN;f++) {           
+        for (unsigned f=0;f<halfN;f++) {           
             // get left/right amplitudes/phases
             float ampL = amplitude(dftL[f]), ampR = amplitude(dftR[f]);
             float phaseL = phase(dftL[f]), phaseR = phase(dftR[f]);
@@ -305,41 +281,6 @@
             phaseDiff = abs(phaseDiff);
 
             if (linear_steering) {
-/*              cfloat w = polar(sqrt(ampL*ampL+ampR*ampR), (phaseL+phaseR)/2);
-                cfloat lt = cfloat(dftL[f][0],dftL[f][1])/w, rt = cfloat(dftR[f][0],dftR[f][1])/w;              */
-//              xfs[f] = -(C*(rt-H) - B*E + F*A + G*(D-lt)) / (G*A - C*E).real();
-//              yfs[f] = (rt - (xfs[f]*E+H))/(F+xfs[f]*G);
-
-                /*
-                Problem: 
-                This assumes that the values are interpolated linearly between the cardinal points.
-                But this way we have no chance of knowing the average volume...
-                - Can we solve that computing everything under the assumption of normalized volume?
-                  No. Seemingly not.
-                - Maybe we should add w explitcitly into the equation and see if we can solve it...
-                */
-
-
-                //cfloat lt(0.5,0),rt(0.5,0);
-                //cfloat x(0,0), y(1,0);
-                /*cfloat p = (C*(rt-H) - B*E + F*A + G*(D-lt)) / (G*A - C*E);
-                cfloat q = B*(rt+H) + F*(D-lt) / (G*A - C*E);
-                cfloat s = sqrt(p*p/4.0f - q);
-                cfloat x = -p;
-                cfloat x1 = -p/2.0f + s;
-                cfloat x2 = -p/2.0f - s;
-                float x = 0;
-                if (x1.real() >= -1 && x1.real() <= 1)
-                    x = x1.real();
-                else if (x2.real() >= -1 && x2.real() <= 1)
-                    x = x2.real();*/
-
-                //cfloat yp = (rt - (x*E+H))/(F+x*G);
-                //cfloat xp = (lt - (y*B+D))/(A+y*C);
-
-                /*xfs[f] = x;
-                yfs[f] = y.real();*/
-
                 // --- this is the fancy new linear mode ---
 
                 // get sound field x/y position
@@ -597,7 +538,6 @@
     float surround_high,surround_low;  // high and low surround mixing coefficient (e.g. 0.8165/0.5774)
     float surround_balance;            // the xfs balance that follows from the coeffs
     float surround_level;              // gain for the surround channels (follows from the coeffs
-    float master_gain;                 // gain for all channels
     float phase_offsetL, phase_offsetR;// phase shifts to be applied to the rear channels
     float front_separation;            // front stereo separation
     float rear_separation;             // rear stereo separation
@@ -625,8 +565,6 @@
 
 void fsurround_decoder::surround_coefficients(float a, float b) { impl->surround_coefficients(a,b); }
 
-void fsurround_decoder::gain(float gain) { impl->surround_gain(gain); }
-
 void fsurround_decoder::phase_mode(unsigned mode) { impl->phase_mode(mode); }
 
 void fsurround_decoder::steering_mode(bool mode) { impl->steering_mode(mode); }
Index: libs/libmythfreesurround/freesurround.cpp
===================================================================
--- libs/libmythfreesurround/freesurround.cpp	(revision 19025)
+++ libs/libmythfreesurround/freesurround.cpp	(working copy)
@@ -62,11 +62,10 @@
 // our default internal block size, in floats
 const unsigned default_block_size = 8192;
 // there will be a slider for this in the future
-//const float master_gain = 1.0;
-//#define MASTER_GAIN * master_gain
+const float master_gain = 1.0;
+//#define MASTER_GAIN * master_gain 
 #define MASTER_GAIN
-//const float master_gain = 1.0/(1<<15);
-//const float inv_master_gain = (1<<15);
+//const float inv_master_gain = 1.0;
 //#define INV_MASTER_GAIN * inv_master_gain
 #define INV_MASTER_GAIN
 
@@ -191,15 +190,13 @@
     if (moviemode)
     {
         params.phasemode = 1;
-        params.center_width = 0;
-        params.gain = 1.0;
+        params.center_width = 25;
+        params.dimension = 0.5;
     }
     else
     {
-        params.center_width = 70;
-        // for 50, gain should be about 1.9, c/lr about 2.7
-        // for 70, gain should be about 3.1, c/lr about 1.5
-        params.gain = 3.1;
+        params.center_width = 65;
+        params.dimension = 0.3;
     }
     switch (surround_mode)
     {
@@ -235,7 +232,6 @@
         decoder->phase_mode(params.phasemode);
         decoder->surround_coefficients(params.coeff_a, params.coeff_b);				
         decoder->separation(params.front_sep/100.0,params.rear_sep/100.0);
-        decoder->gain(params.gain);
     }
 }
 
@@ -249,8 +245,7 @@
     phasemode(0),
     steering(1),
     front_sep(100),
-    rear_sep(100), 
-    gain(1.0)
+    rear_sep(100) 
 {
 }
 
@@ -654,16 +649,6 @@
     {
         if (decoder) 
         {
-            // actually these params need only be set when they change... but it doesn't hurt
-#if 0
-            decoder->steering_mode(params.steering);
-            decoder->phase_mode(params.phasemode);
-            decoder->surround_coefficients(params.coeff_a, params.coeff_b);				
-            decoder->separation(params.front_sep/100.0,params.rear_sep/100.0);
-#endif
-            // decode the bufs->block
-            //decoder->decode(input,output,params.center_width/100.0,params.dimension/100.0);
-            //decoder->decode(output,params.center_width/100.0,params.dimension/100.0);
             decoder->decode(params.center_width/100.0,params.dimension/100.0);
         }
     }
Index: libs/libmythfreesurround/el_processor.h
===================================================================
--- libs/libmythfreesurround/el_processor.h	(revision 19025)
+++ libs/libmythfreesurround/el_processor.h	(working copy)
@@ -47,9 +47,6 @@
 	//  a is the coefficient of left rear in left total, b is the coefficient of left rear in right total; the same is true for right.
 	void surround_coefficients(float a, float b);
 
-	// override for master surround gain
-	void gain(float gain);
-
 	// set the phase shifting mode for decoding
 	// 0 = (+0°,+0°)   - music mode
 	// 1 = (+0°,+180°) - PowerDVD compatibility