diff --git a/.gitignore b/.gitignore
index 3060fee..9a254d5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -64,3 +64,6 @@ dkms.conf
 .vscode/ipch
 .vscode
 *.code-workspace
+
+# Libreoffice
+.~lock.*
\ No newline at end of file
diff --git a/res/doc/buttonMatrixMap.ods b/res/doc/buttonMatrixMap.ods
index 4a7e9b4..63e26e3 100644
Binary files a/res/doc/buttonMatrixMap.ods and b/res/doc/buttonMatrixMap.ods differ
diff --git a/src/main.cpp b/src/main.cpp
index 0023f94..e05d7af 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -47,40 +47,41 @@ CD74HC4067 multiplexer{mux_sig, mux_addr, mux_en};
 /* keyboard (IN) */
 
 CCPotentiometer potentiometers[] = {
-	{multiplexer.pin(0), {1, channel}},
-	{multiplexer.pin(1), {2, channel}},
-	{multiplexer.pin(2), {3, channel}},
-	{multiplexer.pin(3), {4, channel}},
-	{multiplexer.pin(4), {5, channel}},
-	{multiplexer.pin(5), {6, channel}},
-	{multiplexer.pin(6), {7, channel}},
-	{multiplexer.pin(7), {8, channel}},
-	{multiplexer.pin(8), {9, channel}},
-	{multiplexer.pin(9), {10, channel}},
+  {multiplexer.pin(0), {1, channel}},
+  {multiplexer.pin(1), {2, channel}},
+  {multiplexer.pin(2), {3, channel}},
+  {multiplexer.pin(3), {4, channel}},
+  {multiplexer.pin(4), {5, channel}},
+  {multiplexer.pin(5), {6, channel}},
+  {multiplexer.pin(6), {7, channel}},
+  {multiplexer.pin(7), {8, channel}},
+  {multiplexer.pin(8), {9, channel}},
+  {multiplexer.pin(9), {10, channel}},
 };
 
 byte matrix[16][6][2] = {
-/*          0   |    1   |    2   |    3   |    4   |    5    */
-/*0*/	{{1,  0}, {1,  1}, {1,  2}, {1,  3}, {1,  4}, {1,  5}},
-/*1*/	{{1,  6}, {1,  7}, {1,  8}, {1,  9}, {1, 10}, {1, 11}},
-/*2*/	{{1, 18}, {1, 19}, {1, 20}, {1, 21}, {1, 22}, {1, 23}},
-/*3*/	{{1, 48}, {0,  0}, {0,  0}, {0,  0}, {0,  0}, {0,  0}},
-/*4*/	{{1, 42}, {1, 43}, {1, 44}, {1, 45}, {1, 46}, {1, 47}},
-/*5*/	{{1, 36}, {1, 37}, {1, 38}, {1, 39}, {1, 40}, {1, 41}},
-/*6*/	{{1, 30}, {1, 31}, {1, 32}, {1, 33}, {1, 34}, {1, 35}},
-/*7*/	{{1, 24}, {1, 25}, {1, 26}, {1, 27}, {1, 28}, {1, 29}},
-/*8*/	{{1, 12}, {1, 13}, {1, 14}, {1, 15}, {1, 16}, {1, 17}},
-/*a*/	{{0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}},
-/*b*/	{{0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}},
-/*c*/	{{2, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}},
-/*d*/	{{0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}},
-/*e*/	{{0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}},
-/*f*/	{{2, 1}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}},
+  /*        0   |    1   |    2   |    3   |    4   |    5    */
+  /*0*/	{{1,  0}, {1,  1}, {1,  2}, {1,  3}, {1,  4}, {1,  5}},
+  /*1*/	{{1,  6}, {1,  7}, {1,  8}, {1,  9}, {1, 10}, {1, 11}},
+  /*2*/	{{1, 18}, {1, 19}, {1, 20}, {1, 21}, {1, 22}, {1, 23}},
+  /*3*/	{{1, 48}, {0,  0}, {0,  0}, {0,  0}, {0,  0}, {0,  0}},
+  /*4*/	{{1, 42}, {1, 43}, {1, 44}, {1, 45}, {1, 46}, {1, 47}},
+  /*5*/	{{1, 36}, {1, 37}, {1, 38}, {1, 39}, {1, 40}, {1, 41}},
+  /*6*/	{{1, 30}, {1, 31}, {1, 32}, {1, 33}, {1, 34}, {1, 35}},
+  /*7*/	{{1, 24}, {1, 25}, {1, 26}, {1, 27}, {1, 28}, {1, 29}},
+  /*8*/	{{1, 12}, {1, 13}, {1, 14}, {1, 15}, {1, 16}, {1, 17}},
+  /*9*/	{{0,  0}, {0,  0}, {0,  0}, {0,  0}, {0,  0}, {0,  0}},
+  /*a*/	{{0,  0}, {0,  0}, {0,  0}, {0,  0}, {0,  0}, {0,  0}},
+  /*b*/	{{0,  0}, {0,  0}, {0,  0}, {0,  0}, {0,  0}, {0,  0}},
+  /*c*/	{{2,  0}, {0,  0}, {0,  0}, {0,  0}, {0,  0}, {0,  0}},
+  /*d*/	{{0,  0}, {0,  0}, {0,  0}, {0,  0}, {0,  0}, {0,  0}},
+  /*e*/	{{0,  0}, {0,  0}, {0,  0}, {0,  0}, {0,  0}, {0,  0}},
+  /*f*/	{{2,  1}, {0,  0}, {0,  0}, {0,  0}, {0,  0}, {0,  0}},
 };
 
 bool ref[16][6] = {{false}};
 
-unsigned char shift = 0;
+unsigned char shift = 12;
 
 void setup() {
 	for (size_t i = 0; i < KEYBOARD_INSIZE; ++i) {
@@ -128,13 +129,16 @@ void button_matrix_mgt(void) {
 #ifndef DEBUG_MATRIX
           byte type = matrix[i][j][0];
           byte key = matrix[i][j][1];
+#ifdef __PLATFORMIO_BUILD_DEBUG__
+          midi.sendNoteOn({type, CHANNEL_3}, key);
+#endif /* __PLATFORMIO_BUILD_DEBUG__ */
           if (type == 1) {
             midi.sendNoteOn({key + shift, channel}, NOTE_VELOCITY);
           } else if (type == 2) {
-			// todo : note off
+            // todo : note off
             if (key == 0 && shift >= 12) {
               shift -= 12;
-            } else if (key == 1 && shift <= 0xFF - 47 - 12) {
+            } else if (key == 1 && shift <= 6 * 12) {
               shift += 12;
             }
           }
@@ -164,8 +168,7 @@ void capa_sensor_mgt(void) {
 	int static lasttouched;
 	int currtouched = capa_sensor.touched();
 
-	for (uint8_t i = 0; i < 12; i++)
-	{
+	for (uint8_t i = 0; i < 12; i++) {
 		// it if *is* touched and *wasnt* touched before, alert!
 		if ((currtouched & _BV(i)) && !(lasttouched & _BV(i))) {
             midi.sendCC({i, channel}, ON);