#include <Arduino.h>
#include <Audio.h>
#include <Wire.h>
#include <SPI.h>
#include <effect_delay_ext8.h>

AudioSynthWaveformSine sine1;
AudioEffectDelayExternal8 delayExt1(AUDIO_MEMORY8_EXTMEM, 20000);
AudioMixer4 mixer1;
AudioOutputI2S i2s1;
AudioConnection patchCord2(sine1, delayExt1);
AudioConnection patchCord3(sine1, 0, mixer1, 0);
AudioConnection patchCord4(delayExt1, 0, mixer1, 1);
AudioConnection patchCord5(delayExt1, 1, mixer1, 2);
AudioConnection patchCord6(delayExt1, 2, mixer1, 3);
AudioConnection patchCord7(mixer1, 0, i2s1, 0);
AudioConnection patchCord8(mixer1, 0, i2s1, 1);
AudioControlSGTL5000 sgtl5000;

void setup() {
  Serial.begin(230400);
  delay(50);
  Serial.println("<setup begin>");

  AudioMemory(100);

  sgtl5000.enable();
  sgtl5000.lineOutLevel(29);
  sgtl5000.dacVolumeRamp();
  sgtl5000.dacVolume(1.0);
  sgtl5000.unmuteHeadphone();
  sgtl5000.unmuteLineout();
  sgtl5000.volume(0.8, 0.8);  // Headphone volume
  sgtl5000.audioProcessorDisable();
  sgtl5000.autoVolumeDisable();
  sgtl5000.surroundSoundDisable();
  sgtl5000.enhanceBassDisable();
  delayExt1.delay(0, 1333);
  delayExt1.delay(1, 1664);
  delayExt1.delay(2, 2000);
  sine1.amplitude(1.0);
  sine1.frequency(440.0);
  mixer1.gain(0, 1.0);
  mixer1.gain(1, 0.5);
  mixer1.gain(2, 0.5);
  mixer1.gain(3, 0.5);

  Serial.println("<setup end>");
}

void loop() {
  Serial.print("<SINE>");
  sine1.amplitude(1.0);
  delay(200);
  sine1.amplitude(0.0);
  Serial.println("</SINE> (You should hear three quiter delays)");
  delay(5000);
}