diff --git a/source/sketches/testing/MIDI-Out_MCP23017.ino b/source/sketches/testing/MIDI-Out_MCP23017.ino
deleted file mode 100644
index fb7e53c..0000000
--- a/source/sketches/testing/MIDI-Out_MCP23017.ino
+++ /dev/null
@@ -1,48 +0,0 @@
-#include <Wire.h>
-
-//helper to check MCP23017 input
-#define BIT_IS_SET(i, bits)  (1 << i & bits)
-
-//array for the 8 inputs of bank A of MCP23017
-boolean button[8];
-
-void setup() {
-	//set MIDI baudrate
-	Serial.begin(31250);
-	//start I2C
-	Wire.begin();
-}
-
-void loop() {
-	//0x20 address of MCP23017 (A0,A1,A2 to ground)
-	Wire.beginTransmission(0x20);
-	Wire.write(0x12); // set MCP23017 memory pointer to GPIOA address
-	Wire.endTransmission();
-	Wire.requestFrom(0x20, 1); // request one byte of data from MCP20317
-	int inputs = Wire.read();
-	delayMicroseconds(10);
-	int i;
-	for(i=0;i<8;i++) {
-		//checkk for every input if its set
-		if (BIT_IS_SET(i,inputs)) {
-			//only send Note-on, when button was not pressed before
-			if(!button[i]) {
-				button[i] = true;
-				midiSignal(144,60+i,115);
-			}
-		} else {
-		//if not pressed, only send Note-off when button was pressed before
-			if(button[i]) {
-				button[i] = false;
-				midiSignal(128,60+i,0);
-			}
-		}
-	}  
-}
-
-//send MIDI signal
-void midiSignal(byte b1, byte b2, byte b3) {
-	Serial.write(b1);
-	Serial.write(b2);
-	Serial.write(b2);
-}