audio_bender.pde

int potpin = 0;
int speakerPin = 9;
int redPin = 10;
int bluePin = 12;

int high = 0, low = 500;

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

void loop() 
{ 
  int val = analogRead(potpin);
  high = max(high, val);
  low = min(low, val);
  
  analogWrite(redPin, map(val, low, high, 0, 255));
  analogWrite(bluePin, map(val, low, high, 255, 0));
  
  int tone = map(val, low, high, 1915, 956);
  digitalWrite(speakerPin, HIGH);
  delayMicroseconds(tone);
  digitalWrite(speakerPin, LOW);
  delayMicroseconds(tone);
}