Added some display code for a display I'm not using.

pma770.ino

@@ -1,5 +1,5 @@
 /*
-  PMA770Relay Alpha2
+  PMA770Relay 0.1
 
   dewdude@gmail.com - 29-12-2019
   
@@ -15,6 +15,8 @@ int matrix = A0;
 byte out = 0;
 int mx = 0;
 
+LiquidCrystal_I2C lcd(0x27,16,2);
+
 void updateShiftRegister()
 {
    digitalWrite(latchPin,LOW);
@@ -34,6 +36,8 @@ void setTape2()
   DontCrossTheStreams();
   bitSet(out,7);
   updateShiftRegister();
+  lcd.setCursor(7, 1);
+  lcd.print("TAPE-2   ");
 }
 
 void setTape1()
@@ -41,6 +45,8 @@ void setTape1()
   DontCrossTheStreams();
   bitSet(out,6);
   updateShiftRegister();
+  lcd.setCursor(7, 1);
+  lcd.print("TAPE-1   ");
 }
 
 void setAUX()
@@ -48,6 +54,8 @@ void setAUX()
   DontCrossTheStreams();
   bitSet(out,5);
   updateShiftRegister();
+  lcd.setCursor(7, 1);
+  lcd.print("AUX      ");
 }
 
 void setTune()
@@ -55,6 +63,8 @@ void setTune()
   DontCrossTheStreams();
   bitSet(out,4);
   updateShiftRegister();
+  lcd.setCursor(7, 1);
+  lcd.print("TUNER    ");
 }
 
 void setPh1()
@@ -63,6 +73,8 @@ void setPh1()
   bitSet(out,3);
   bitSet(out,1);
   updateShiftRegister();
+  lcd.setCursor(7, 1);
+  lcd.print("PHONO-1  ");
 }
 
 void setPh2()
@@ -71,6 +83,8 @@ void setPh2()
   bitSet(out,3);
   bitSet(out,2);
   updateShiftRegister();
+  lcd.setCursor(7, 1);
+  lcd.print("PHONO-2  ");
 }
 
 void setup()
@@ -79,7 +93,15 @@ void setup()
   pinMode(dataPin, OUTPUT);  
   pinMode(clockPin, OUTPUT);
   bitSet(out,5);
+  lcd.init();
+  lcd.backlight();
+  lcd.home();
+  lcd.setCursor(0, 0);
+  lcd.print("Denon PMA-770");
+  lcd.setCursor(0, 1);
+  lcd.print("Input: AUX");
   updateShiftRegister();
+
 }
 
 void loop() {