teensy lowpass breath controller

gistfile1.txt

#include <Audio.h>
#include <Wire.h>
#include <SPI.h>
#include <SD.h>
#include <SerialFlash.h>
#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
#include <avr/power.h>
#endif

// GUItool: begin automatically generated code
AudioInputI2S i2s1;               //xy=429,350
AudioFilterStateVariable filter1; //xy=677,374
AudioOutputI2S i2s2;              //xy=988,390
AudioConnection patchCord1(i2s1, 0, filter1, 0);
AudioConnection patchCord2(filter1, 0, i2s2, 0);
AudioConnection patchCord3(filter1, 0, i2s2, 1);
AudioControlSGTL5000 sgtl5000_1; //xy=825,587
// GUItool: end automatically generated code

#define PIN 6
#define NUMPIXELS 12
Adafruit_NeoPixel pixels = Adafruit_NeoPixel(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);

void setup()
{
  AudioMemory(256);
  pixels.begin();
  Serial.begin(115200);
  sgtl5000_1.enable();
  sgtl5000_1.volume(0.8);
  delay(50);
}

unsigned long safeMap(int data, int min, int max, int out1, int out2)
{
  if (data < min)
  {
    data = min;
  }
  if (data > max)
  {
    data = max;
  }

  return map(data, min, max, out1, out2);
}

void loop()
{

  unsigned long resonanceKnob = analogRead(A3);

  //filter is working
  if (resonanceKnob > 20)
  {
    unsigned long pressure = analogRead(A1);
    int min = 90;
    int max = 700;

    unsigned long fre = safeMap(pressure, min, max, 1000, 20000);

    int res = map(resonanceKnob, 0, 1024, 1, 5);

    filter1.frequency(fre);
    filter1.resonance(res);

    int led = map(fre, 0, 20000, 0, NUMPIXELS);

    for (int i = 1; i < NUMPIXELS; i++)
    {
      if (i < led)
      {
        pixels.setPixelColor(i, pixels.Color(0, 255, 25));
      }
      else
      {
        pixels.setPixelColor(i, pixels.Color(0, 0, 0));
      }
    }
    pixels.setPixelColor(0, pixels.Color(0, 25, 255));
    pixels.show();
  }
  else
  {
    filter1.frequency(20000);
    filter1.resonance(5);

    for (int i = 1; i < NUMPIXELS; i++)
    {
      pixels.setPixelColor(i, pixels.Color(0, 0, 0));
    }

    pixels.setPixelColor(0, pixels.Color(255, 0, 0));
    pixels.show();
    delay(150);
    pixels.setPixelColor(0, pixels.Color(0, 0, 0));
    pixels.show();
    delay(150);
  }

  delay(8);
}