Oscillator/Synth/Shift Register

Synth Piano:

1x Arduino Uno
1x Breadboard
1x Accu 3,7v
1x LiPo Rider Pro SEEED Studio
1x Audio Amplifier 
2x Speakers
27x Buttons
27x Resistors (10k)
3x Shift Register - Parallel to Serial 

Code: 

#include <SPI.h>
#include <Arduino.h> #include <MusicPlayer.h> //#include <SD.h>
#define dataPin 8 #define clockPin 9 #define latchPin 10
#define dataPin2 5 #define clockPin2 6 #define latchPin2 7
#define dnote 4
#define plus 3 #define moin 2
byte switchVar1 = 0; byte switchVar2 = 0; byte switchVar3 = 0;
51int instru = 79;
int sensorvalue = 500;
void son (int myNote, int myVolu, int myTon, int myToff) {
player.midiNoteOn(0, myNote, myVolu); delay(myTon);
player.midiNoteOff(0, myNote, myVolu); delay(myToff);
}
int but(int x, int y, int h, int l) {
if ((digitalRead (moin) == HIGH) && (x<=(h-y))) { x=x+y
;
}
else if ((digitalRead (plus) == HIGH) && (x>=(l+y))){
x=x-y; }
52
return x; }
void setup() {

Serial.begin(9600);
player.beginInMidiFmt();
player.midiWriteData(0xB0, 0x07, 120); // set volume player.midiDemoPlayer();pinMode(latchPin2, OUTPUT); pinMode(clockPin2, OUTPUT); pinMode(dataPin2, INPUT);
pinMode(dnote, INPUT);
pinMode(plus, INPUT);
pinMode(moin, INPUT); }
void loop() {

sensorvalue = analogRead(5); // Serial.println(sensorvalue);if (sensorvalue < 540){ Serial.println("1");
volu = but (volu, 5, 127, 0); Serial.println(volu);
delay (1000);
}
else if (sensorvalue < 620){
Serial.println("2");
ton = but (ton, 10, 10, 1000); Serial.println(ton);
}
else if (sensorvalue < 700){ Serial.println("3");
toff = but (toff, 10, 10, 1000); Serial.println(toff);
}
else if (sensorvalue < 780){
Serial.println("4"); player.midiWriteData(0xB0, 0, 0x78); player.midiWriteData(0xC0, 40, 0);
}
else if (sensorvalue < 815){ Serial.println("5"); player.midiWriteData(0xB0, 0, 0x79);
54if (instru > 8)instru = 1;
instru = but(instru, 1, 8, 1); player.midiWriteData(0xC0, instru, 0); Serial.println(instru);
}
else if (sensorvalue < 845){ Serial.println("6"); player.midiWriteData(0xB0, 0, 0x79); if ((instru<9) || (instru>16)) instru = 9; instru = but(instru, 1, 16, 9); player.midiWriteData(0xC0, instru, 0); Serial.println(instru);
}
else if (sensorvalue < 870){Serial.println("7"); player.midiWriteData(0xB0, 0, 0x79);
if ((instru<17) || (instru>24)) instru = 17; instru = but(instru, 1, 24, 17); player.midiWriteData(0xC0, instru, 0);
Serial.println(instru); }
else if (sensorvalue < 888){ Serial.println("8"); player.midiWriteData(0xB0, 0, 0x79);
if ((instru<25) || (instru>40)) instru = 25; instru = but(instru, 1, 40, 25); player.midiWriteData(0xC0, instru, 0);
55Serial.println(instru); }
else if (sensorvalue < 910){
Serial.println("9");
player.midiWriteData(0xB0, 0, 0x79); // set percussion 78 or synth 79 if ((instru<41) || (instru>56)) instru = 41;
instru = but(instru, 1, 56, 41);
player.midiWriteData(0xC0, instru, 0);
Serial.println(instru); }
else if (sensorvalue < 928){ Serial.println("10"); player.midiWriteData(0xB0, 0, 0x79);
if ((instru<57) || (instru>80)) instru = 65; instru = but(instru, 1, 80, 57); player.midiWriteData(0xC0, instru, 0);
Serial.println(instru); }
else if (sensorvalue < 945){ Serial.println("11"); player.midiWriteData(0xB0, 0, 0x79);
if ((instru<81) || (instru>96)) instru = 91; instru = but(instru, 1, 96, 81); player.midiWriteData(0xC0, instru, 0);
Serial.println(instru); }
else if (sensorvalue < 1000){Serial.println("12");
player.midiWriteData(0xB0, 0, 0x79); // set percussion 78 or synth 79 if ((instru<97) || (instru>124)) instru = 99;
instru = but(instru, 1, 120, 97);
player.midiWriteData(0xC0, instru, 0);
Serial.println(instru); }
else{ Serial.println("Error");
}switch (switchVar1) { case B1:
son (55, volu, ton, toff);
break; case B10:
son (53, volu, ton, toff);
break; case B100:
son (52, volu, ton, toff);
break; case B1000:
son (50, volu, ton, toff);
break;
case B10000:
son (54, volu, ton, toff);
break;
case B100000:
son (51, volu, ton, toff);
break;
case B1000000:
son (49, volu, ton, toff);
break;
case B10000000:
son (48, volu, ton, toff);
break; }
59switch (switchVar2) { case B1:
son (59, volu, ton, toff);
break; case B10:
son (58, volu, ton, toff);
break; case B100:
son (60, volu, ton, toff);
break; case B1000:
son (57, volu, ton, toff);
break;
case B10000:
son (63, volu, ton, toff);
break;
case B100000:
son (62, volu, ton, toff);
break;
case B1000000:
son (61, volu, ton, toff); break;
60
case B10000000:
son (56, volu, ton, toff); break;
}switch (switchVar3) { case B1:
son (71, volu, ton, toff);
break; case B10:
son (65, volu, ton, toff);
break; case B100:
son (69, volu, ton, toff);
break; case B1000:
son (67, volu, ton, toff);
break;
case B10000:
son (70, volu, ton, toff);
break;
case B100000:
son (66, volu, ton, toff);
61
break;
case B1000000:
son (68, volu, ton, toff);
break;
case B10000000:
son (64, volu, ton, toff);
break; }
if (digitalRead (dnote) == HIGH) son (72, volu, ton, toff);Serial.println("-------------------");

}

int i;
62
int temp = 0;
int pinState;
byte myDataIn = 0;
pinMode(myClockPin, OUTPUT);
pinMode(myDataPin, INPUT);

for (i=7; i>=0; i--) {
digitalWrite(myClockPin, 0); delayMicroseconds(2);
temp = digitalRead(myDataPin); if (temp) {
pinState = 1;}
else {
//debugging turn it off
63
//print statement: 0 pinState = 0;
}

digitalWrite(myClockPin, 1);
}

return myDataIn;
}