diff --git a/src/atv.cpp b/src/atv.cpp
index a536f64..3a52a48 100644
--- a/src/atv.cpp
+++ b/src/atv.cpp
@@ -53,6 +53,7 @@ atv::atv(uint64_t TuneFrequency, uint32_t SR, int Channel, uint32_t Lines) : buf
 
     sampletab[(buffersize * registerbysample - 2)] = (0x5A << 24) + (1 & 0x7) + (1 << 4) + (0 << 3); // Amp 1
     sampletab[(buffersize * registerbysample - 1)] = (0x5A << 24) + (0 & 0x7) + (1 << 4) + (0 << 3); // Amp 0
+    sampletab[(buffersize * registerbysample - 3)] = (0x5A << 24) + (4 & 0x7) + (1 << 4) + (0 << 3); // Amp 1
 
     SetDmaAlgo();
 }
@@ -71,6 +72,8 @@ void atv::SetDmaAlgo()
 
     uint32_t level0= mem_virt_to_phys(&usermem[(buffersize * registerbysample - 1)]);
     uint32_t level1= mem_virt_to_phys(&usermem[(buffersize * registerbysample - 2)]);
+    uint32_t level4= mem_virt_to_phys(&usermem[(buffersize * registerbysample - 3)]);
+    
     int shortsync_0=2;
     int shortsync_1=30;
 
@@ -78,7 +81,9 @@ void atv::SetDmaAlgo()
     int longsync_1=2;
 
     int normalsync_0=4;
-    int normalsync_1=8;
+    int normalsync_1=6;
+
+    int frontsync_1=2;
 
     for (int frame = 0; frame < 2; frame++)
     {
@@ -297,9 +302,9 @@ void atv::SetDmaAlgo()
                                                                                                           //@0
                 //DATA IN / 1us
                 cbp->info = 0;                                                       //BCM2708_DMA_NO_WIDE_BURSTS | BCM2708_DMA_WAIT_RESP  ;
-                if(line<10) //remove 10 lines 
-                     cbp->src=level1;
-                else     
+                if(line<20) cbp->src=level1;
+                //if((line>=20)&&(line<40)) cbp->src=level4;
+                if(line>=20)    
                     cbp->src = mem_virt_to_phys(&usermem[samplecnt * registerbysample+frame*312*registerbysample]); //Amp 1
 
                 cbp->dst = 0x7E000000 + (PADS_GPIO_0 << 2) + PADS_GPIO;
@@ -323,11 +328,11 @@ void atv::SetDmaAlgo()
                 cbp->next = mem_virt_to_phys(cbp + 1);
                 cbp++;
             }
-            /*
+            
             //FRONT PORSH
             //SYNC 2us
             cbp->info = 0;                                                              //BCM2708_DMA_NO_WIDE_BURSTS | BCM2708_DMA_WAIT_RESP  ;
-            cbp->src = mem_virt_to_phys(&usermem[(buffersize * registerbysample - 2)]); //Amp 1
+            cbp->src = level1; //Amp 1
             cbp->dst = 0x7E000000 + (PADS_GPIO_0 << 2) + PADS_GPIO;
             cbp->length = 4;
             cbp->stride = 0;
@@ -344,10 +349,10 @@ void atv::SetDmaAlgo()
                 cbp->dst = 0x7E000000 + (PWM_FIFO << 2) + PWM_BASE;
             else
                 cbp->dst = 0x7E000000 + (PCM_FIFO_A << 2) + PCM_BASE;
-            cbp->length = 4 * 2; //2us
+            cbp->length = 4 * frontsync_1; //2us
             cbp->stride = 0;
             cbp->next = mem_virt_to_phys(cbp + 1);
-            cbp++;*/
+            cbp++;
         }
     }
     cbp--;