/*
 * Headgear code 
 * 2/1/10
 * Description: Simple code for reading in 6 microphones on an Arduino Duemilinove for use in midi triggering.
 * http://www.tristanshone.com
 */

// mic input pins
int mic1Pin = 0;    
int mic2Pin = 1;    
int mic3Pin = 2;    
int mic4Pin = 3;    
int mic5Pin = 4;    
int mic6Pin = 5;    
int mic7Pin = 6;    
int mic8Pin = 7;    

// variable to store the value coming from the sensor
int val1 = 0;       
int val2 = 0;
int val3 = 0;
int val4 = 0;
int val5 = 0;
int val6 = 0;
int val7 = 0;
int val8 = 0;

//initial variable to store the mic value from the 6 pins
int valI1 = 0;       
int valI2 = 0;
int valI3 = 0;
int valI4 = 0;
int valI5 = 0;
int valI6 = 0;
int valI7 = 0;
int valI8 = 0;

// variable to store the value coming from the sensor after scaling mic input
int vel1 = 0;       
int vel2 = 0;
int vel3 = 0;
int vel4 = 0;
int vel5 = 0;
int vel6 = 0;
int vel7 = 0;
int vel8 = 0;

int lowVelLim = 25;

//millis interval 
long interval = 200;

long previous1Millis = 0;
long previous2Millis = 0;
long previous3Millis = 0;
long previous4Millis = 0;
long previous5Millis = 0;
long previous6Millis = 0;
long previous7Millis = 0;
long previous8Millis = 0;

void setup() {
  Serial.begin(57600);
  delay(1000);
  //read initial value from sensor
  valI1 = analogRead(mic1Pin);    // read the value from the sensor
  valI2 = analogRead(mic2Pin);    // read the value from the sensor
  valI3 = analogRead(mic3Pin);    // read the value from the sensor
  valI4 = analogRead(mic4Pin);    // read the value from the sensor
  valI5 = analogRead(mic5Pin);    // read the value from the sensor
  valI6 = analogRead(mic6Pin);    // read the value from the sensor
  valI7 = analogRead(mic7Pin);    // read the value from the sensor
  valI8 = analogRead(mic8Pin);    // read the value from the sensor
  delay(2000);
  
}

void loop() {
  val1 = analogRead(mic1Pin);    // read the value from the sensor
  val2 = analogRead(mic2Pin);    // read the value from the sensor
  val3 = analogRead(mic3Pin);    // read the value from the sensor
  val4 = analogRead(mic4Pin);    // read the value from the sensor
  val5 = analogRead(mic5Pin);    // read the value from the sensor
  val6 = analogRead(mic6Pin);    // read the value from the sensor
  val7 = analogRead(mic7Pin);    // read the value from the sensor
  val8 = analogRead(mic8Pin);    // read the value from the sensor
  

  //playing around with the scaling of the microphone analog inputs because they vary (essentially velocity)
  vel1 = val1*.75;
  vel2 = val2*.75;
  vel3 = val3*.75;
  vel4 = val4;
  vel5 = val5*.75;
  vel6 = val6;
  

  //run this to print and see the mics' values
  /*Serial.print(val1, DEC);
  Serial.print("     ");
  Serial.print(val2, DEC);
  Serial.print("     ");
  Serial.print(val3, DEC);
  Serial.print("     ");  
  Serial.print(val4, DEC);
  Serial.print("     ");  
  Serial.print(val5, DEC);
  Serial.print("     ");
  Serial.println(val6, DEC);
  */
  
  //*****MIC 1 CODE
  if(val1 > 30 && (millis() - previous1Millis > 400)){
    if(vel1>127){
      vel1 = 127;
    }
    else{}
    MIDI_TX(149,64,vel1); // Send a Note On (pitch 64, velocity vel1 on channel 1) 
    MIDI_TX(149,64,0);    // Send a Note (pitch 42, velo 127 on channel 1)
    //Serial.println("UNDER1");
    previous1Millis = millis();
  }
  else{
    //Serial.println("----");
  }
  
  //*****MIC 2 CODE  
  if(val2 > 40 && (millis() - previous2Millis > 400)){
    if(vel2>127){
      vel2 = 127;
    }
    else{}    
    MIDI_TX(149,65,vel2); // Send a Note (pitch 42, velo 127 on channel 1) 
    MIDI_TX(149,65,0); // Send a Note (pitch 42, velo 127 on channel 1)
    //Serial.println("UNDER2");
    previous2Millis = millis();
  }
  else{
    //Serial.println("----");
  }

  //*****MIC 3 CODE   
  if(val3 > 30 && (millis() - previous3Millis > 400)){  //check to see if 1) val exceeds a threshhold and 2) the time
                                                         // has been longer than 400 ms
    if(vel3>127){
      vel3 = 127;   
    }
    else{}
    MIDI_TX(149,66,vel3); // Send a Note On (pitch 42, velo 127 on channel 6) 
    MIDI_TX(149,66,0); // Send a note off (pitch 42, velo 0 on channel 6)
    previous3Millis = millis();
  }
  else{

  }
 
  //*****MIC 4 CODE 
  if(val4 > 30 && (millis() - previous4Millis > 400)){
    if(vel4>127){
      vel4 = 127;
    }
    else{}
    MIDI_TX(149,67,vel4); 
    MIDI_TX(149,67,0); 

    previous4Millis = millis();
  }
  else{

  }

  //*****MIC 5 CODE   
  if(val5 > lowVelLim && (millis() - previous5Millis > interval)){
    if(vel5>127){
      vel5 = 127;
    }
    else{}
    MIDI_TX(149,68,vel5);  
    MIDI_TX(149,68,0);

    previous5Millis = millis();
  }
  else{

  } 
  
  //*****MIC 6 CODE 
  if(val6 > lowVelLim && (millis() - previous6Millis > interval)){
    if(vel6>127){
      vel6 = 127;
    }
    else{}
    MIDI_TX(149,69,vel6); 
    MIDI_TX(149,69,0); 
    //Serial.println("UNDER6");
    previous6Millis = millis();
  }
  else{

  }     

// used if you have a MEGA arduino and have more than 6 analog input pins  
  /*if(val7 < 750 && (millis() - previous7Millis > interval)){
    MIDI_TX(149,67,127); 
    MIDI_TX(149,67,0); 

    previous7Millis = millis();
  }
  else{

  } 
 
  if(val8 < 750 && (millis() - previous8Millis > interval)){
    MIDI_TX(149,68,127); 
    MIDI_TX(149,68,0);

    previous8Millis = millis();
  }
  else{

  }   */
}

//Send midi command as a serial message
void MIDI_TX(unsigned char MESSAGE, unsigned char PITCH, unsigned char VELOCITY) 
{
  Serial.print(MESSAGE);
  Serial.print(PITCH);
  Serial.print(VELOCITY);
}