diff --git a/soft/PjtKEIL_StepSon/Src/GestionSon.s b/soft/PjtKEIL_StepSon/Src/GestionSon.s
index f8b2761..f5caf61 100644
--- a/soft/PjtKEIL_StepSon/Src/GestionSon.s
+++ b/soft/PjtKEIL_StepSon/Src/GestionSon.s
@@ -30,23 +30,24 @@ CallbackSon
 	ldr r1, =index
 	ldr r2, [r1]
 	ldr r3, =Son
-	push {r6}
-	ldr r6, LongueurSon
+	ldr r0, LongueurSon
 	
-	cmp r2, r6
+	cmp r2, r0
 	ble notEqual
-	pop {r6}
+	
+	bx lr
 	
 notEqual
-	mov r6, #2
-	mul r6, r2
-	LDRSH r0, [r3, r6]
+	mov r0, #2
+	mul r0, r2
+	ldrsh r0, [r3, r0]
 	add r0, #32768
 	push {r4}
 	mov r4, #719
 	mul r0, r4
 	mov r4, #65535
 	udiv r0, r4
+	pop {r4}
 	push {r7}
 	ldr r7, =SortieSon
 	str r0, [r7]
@@ -58,6 +59,7 @@ notEqual
 	str r2, [r5]
 		
 	pop {r5}
-	pop {r4}
-		
-	END	
\ No newline at end of file
+	
+	bx lr
+	
+END	
\ No newline at end of file
diff --git a/soft/PjtKEIL_StepSon/StepSon.uvoptx b/soft/PjtKEIL_StepSon/StepSon.uvoptx
index 80a86dc..9edab1c 100644
--- a/soft/PjtKEIL_StepSon/StepSon.uvoptx
+++ b/soft/PjtKEIL_StepSon/StepSon.uvoptx
@@ -170,6 +170,22 @@
           <ExecCommand></ExecCommand>
           <Expression>\\StepSon\Src/GestionSon.s\30</Expression>
         </Bp>
+        <Bp>
+          <Number>1</Number>
+          <Type>0</Type>
+          <LineNumber>64</LineNumber>
+          <EnabledFlag>1</EnabledFlag>
+          <Address>0</Address>
+          <ByteObject>0</ByteObject>
+          <HtxType>0</HtxType>
+          <ManyObjects>0</ManyObjects>
+          <SizeOfObject>0</SizeOfObject>
+          <BreakByAccess>0</BreakByAccess>
+          <BreakIfRCount>0</BreakIfRCount>
+          <Filename>.\Src\GestionSon.s</Filename>
+          <ExecCommand></ExecCommand>
+          <Expression></Expression>
+        </Bp>
       </Breakpoint>
       <WatchWindow1>
         <Ww>
@@ -185,7 +201,7 @@
         <Ww>
           <count>2</count>
           <WinNumber>1</WinNumber>
-          <ItemText>r3,0x0A</ItemText>
+          <ItemText>r3,0x10</ItemText>
         </Ww>
         <Ww>
           <count>3</count>