Arduino program to divide an analog sensor into a number of discrete ranges and trigger a different WAV file when the sensor value enters one of the ranges.

AnalogSelectWav.pde

// these are constants that won't change while the code is running
const int lowerBound = 0;
const int threshold1 = 350;
const int threshold2 = 700;
const int upperBound = 1024;

// these variables will change
int sensorValue = 0;
int lastRange = 0;

void setup() {
  Serial.begin(9600);
}
 
void loop() {

  sensorValue = analogRead(0);

  if (lowerBound <= sensorValue && sensorValue < threshold1) {
    if (lastRange != 1) {
      Serial.println("1.wav");
      lastRange = 1;
    }
  } 
  else if (threshold1 <= sensorValue && sensorValue < threshold2) {
    if (lastRange != 2) {
      Serial.println("2.wav");
      lastRange = 2;
    }
  }
  else if(threshold2 <= sensorValue && sensorValue <= upperBound) {
    if (lastRange != 3) {
      Serial.println("3.wav");
      lastRange = 3;
    }
  }
}