diff --git a/Makefile b/Makefile
index 4460895..78cd39f 100644
--- a/Makefile
+++ b/Makefile
@@ -52,14 +52,9 @@ re: fclean all
 ## Send to calc
 send:
 	@if [ ! -f $(NAME).g1a ]; then \
-		echo "Please make before sending." >&2; false; \
+		echo "Please make before sending."; \
+		else $(SENDR) SEND $(NAME).g1a $(NAME).g1a fls0; \
 	fi
-	@if $(SENDR) SEND $(NAME).g1a $(NAME).g1a fls0 1>/dev/null; \
-		then true; \
-		else echo "UsbConnector: calculator not plugged-in/in receive mode" >&2; \
-		false; \
-	fi
-
 ## Phuneral phuture ?
 .PHONY: all clean fclean mrproper re send
 # END OF FILE
diff --git a/Makefile.cfg b/Makefile.cfg
index 34eeb42..e3028c6 100644
--- a/Makefile.cfg
+++ b/Makefile.cfg
@@ -1,6 +1,6 @@
 #!/usr/bin/make -f
 # PROJECT INFORMATION
-NAME = Sound4Calc
+NAME = sound
 ICON = ./icon.bmp
 LIB = gcc fx
 
diff --git a/README.md b/README.md
index 7685518..a576695 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,9 @@
+# Sound4Calc : make sound on your calc !
 
-Make sound on your Casio calculator Graph 75 !
+## Building
+
+Building the library is achieved by the Makefile :
+- `make`: make the library ;
+- `make clean`: clean the object files ;
+- `make fclean`: clean the object files and the final library ;
+- `make re`: cleans the object files and the final library, then makes the project.
\ No newline at end of file
diff --git a/src/Sound4Calc.c b/src/Sound4Calc.c
index 870a4ab..159126b 100644
--- a/src/Sound4Calc.c
+++ b/src/Sound4Calc.c
@@ -9,7 +9,7 @@
 
 //#define DEBUG
 
-#define PI 3.14159265358
+//#define PI 3.14159265358
 
 unsigned char *itoa(int n, unsigned char* str, int base)
 {
@@ -24,7 +24,7 @@ unsigned char *itoa(int n, unsigned char* str, int base)
 int main(void)
 {
     unsigned int key;
-    char buffer[50];
+    // char buffer[50];
     unsigned char str[20];
 
     int sleep = 2000;
@@ -157,12 +157,10 @@ if(is_SH4)
     }   
 }
 
-
-
 char getMPU(void)
 {
     // Port L control register.
-    volatile unsigned short *plcr = (unsigned short *)0xa4000114;
+    volatile unsigned short *plcr = (unsigned short *)0xA4000114;
     // Saved value for PLCR.
     unsigned short saved_plcr;
     unsigned int tested_plcr;