/*
Make some sounds!
(c) 2018 Bradley Knockel
*/


// select speaker pin
int pin = 10;

void setup() {
  pinMode(pin,OUTPUT);
}

void loop() {

  // octaves!
  int time2=100;
  for (int i=5; i<=13; i++) {
    tone(pin,pow(2,i),time2);
    delay(time2+1);
  }

  // clicks
  for (int i=0;i<50;i++) {
    digitalWrite(pin,HIGH);
    delay(1);
    digitalWrite(pin,LOW);
    delay(40);
  }

  // Change volume of PWM frequency.
  // analogWrite(pin,2^7) is max volume.
  // tone() cannot change the volume.
  int changes=100;
  for (int i=0;i<=changes;i++) {
    analogWrite(pin,min(255,pow(2.0,i*7.0/changes)));
    delay(3000/(changes+1));
  }
  
}