Arduino Danger Shield Synth DIY, chip driver

/*
This example code is in the public domain.
Freaky Steve Danger shield chip driver noise synth
*/
int val = 0;
int val12 = 1;
int sensorValue = 30;  // variable to store the value coming from the sensor
int sensorValue1 = 30;  // variable to store the value coming from the sensor
int sensorValue2 = 30;  // variable to store the value coming from the slider
int sensorValue3 = 30;  // variable to store the value coming from the photo resist
static char out = 255;
static int t = 255;
static int i = 0;
int count = 0;
ISR(TIMER1_OVF_vect){
//The timer overflows at 62.5 KHz.
//Algorithmic symphonies calls for 8khz
// Throw a counter in there to slow things down.
// It is also fun to play with the counter :-)
//http://countercomplex.blogspot.com/2011/10/algorithmic-symphonies-from-one-line-of.html
if(count < sensorValue1){
count++;
return;
}else{
count = 0;
}
/** The best so far */
out = (char)(((sensorValue1>>6|t|t>>(t>>3))*10+((t>>11)&7))|(t)*(t>>14)|(t)*(t>>9))
^(sensorValue*(t/16) |(t%13) | (sensorValue1%15))
^(sensorValue2*(t/8));
OCR1A = out;
t++;
}
// Configures TIMER1 to fast PWM non inverted mode.
// Prescaler set to 1, which means that timer overflows
// every 16MHz/256 = 62.5KHz
void initPWM(void)
{
pinMode(9, OUTPUT);
// 8-bit Fast PWM – non inverted PWM
TCCR1A= _BV(COM1A1) | _BV(WGM10);
// Start timer without prescaler
TCCR1B = _BV(CS10) | _BV(WGM12);
// Enable overflow interrupt for OCR1A
TIMSK1 = _BV(TOIE1);
}
void setup() {
initPWM();
int val = 0;
// initialize the digital pin as an output.
// Pin 13 has an LED connected on most Arduino boards:
pinMode(13, OUTPUT);
//  ******** switch pins
pinMode(12, INPUT);
pinMode(11, INPUT);
pinMode(10, INPUT);
//  ******** switch pins
pinMode(8, OUTPUT);
pinMode(7, OUTPUT);
pinMode(6, OUTPUT);
pinMode(5, OUTPUT);
pinMode(3, OUTPUT);
pinMode(0, OUTPUT);
pinMode(2, OUTPUT);
pinMode(1, OUTPUT);
digitalWrite(1,HIGH);
digitalWrite(2,HIGH);
digitalWrite(3,HIGH);
//  ***  serial in
digitalWrite(4,HIGH);
//  *** serial in
digitalWrite(5,HIGH);
digitalWrite(6,HIGH);
//  *** latch d7
digitalWrite(7,HIGH);
//  *** clock d8
digitalWrite(8,HIGH);
//  ******** switch pins
digitalRead(10);
digitalRead(11);
digitalRead(12);
//  ******** switch pins
digitalWrite(13,HIGH);
}
void loop() {
initPWM();
delay(10);
val = analogRead(4);
// read the value from the sensor:
sensorValue = map(analogRead(0),0,1023,0,1023);
sensorValue1 = map(analogRead(1),0,1023,1,1023);
sensorValue2 = map(analogRead(2),0,1023,1,1023);
sensorValue3 = map(analogRead(3),0,1023,1,1023);
do{
digitalWrite(3, HIGH);   // set the LED on
delay(sensorValue1);              // wait for a second
digitalWrite(3, LOW);    // set the LED off
delay(sensorValue2);              // wait for a second
digitalWrite(1, HIGH);   // set the LED on
delay(sensorValue3);              // wait for a second
digitalWrite(1, LOW);    // set the LED off
delay(sensorValue2);              // wait for a second
sensorValue = map(analogRead(0),0,1023,1,1023);
sensorValue1 = map(analogRead(1),0,1023,1,1023);
sensorValue2 = map(analogRead(2),0,1023,1,1023);
val = digitalRead(12);
do{
tone(3, sensorValue,sensorValue2);
// set the LED off
delay(sensorValue2);              // wait for a second
sensorValue = map(analogRead(0),0,1023,1,1023);
sensorValue1 = map(analogRead(1),0,1023,1,1023);
sensorValue2 = map(analogRead(2),0,1023,1,1023);
} while (sensorValue1>1000);
//
} while (sensorValue>1000);
//
digitalWrite(3, HIGH);   // set the LED on
delay(100);              // wait for a second
digitalWrite(3, LOW);    // set the LED off
delay(100);              // wait for a second
}