299 lines
6.6 KiB
C++
299 lines
6.6 KiB
C++
#include <Audio.h>
|
|
#include <Wire.h>
|
|
#include <Adafruit_NeoTrellisM4.h>
|
|
#include <SFE_MicroOLED.h>
|
|
#include <SparkFun_Qwiic_Button.h>
|
|
#include <Adafruit_MPR121.h>
|
|
#include "synth.h"
|
|
#include "patches.h"
|
|
#include "notes.h"
|
|
#include "fingering.h"
|
|
|
|
#define DEBUG
|
|
#define KNEE_OFFSET 0
|
|
#define KEY_OFFSET 2
|
|
|
|
FMVoice Chanter;
|
|
FMVoice Drones[3];
|
|
FMVoice Regulators[3];
|
|
|
|
AudioFilterBiquad biquad1;
|
|
AudioMixer4 mixDrones;
|
|
AudioMixer4 mixRegulators;
|
|
AudioMixer4 mixL;
|
|
AudioMixer4 mixR;
|
|
AudioOutputAnalogStereo dacs1;
|
|
|
|
#ifdef DEBUG
|
|
AudioSynthNoiseWhite debug;
|
|
#endif
|
|
|
|
AudioConnection FMVoicePatchCords[] = {
|
|
#ifdef DEBUG
|
|
{debug, 0, mixL, 3},
|
|
{debug, 0, mixR, 3},
|
|
#endif
|
|
|
|
{Chanter.outputMixer, 0, biquad1, 0},
|
|
{biquad1, 0, mixL, 0},
|
|
{biquad1, 0, mixR, 0},
|
|
|
|
{Drones[0].outputMixer, 0, mixDrones, 0},
|
|
{Drones[1].outputMixer, 0, mixDrones, 1},
|
|
{Drones[2].outputMixer, 0, mixDrones, 2},
|
|
{mixDrones, 0, mixL, 1},
|
|
{mixDrones, 0, mixR, 1},
|
|
|
|
{Regulators[0].outputMixer, 0, mixRegulators, 0},
|
|
{Regulators[1].outputMixer, 0, mixRegulators, 1},
|
|
{Regulators[2].outputMixer, 0, mixRegulators, 2},
|
|
{mixRegulators, 0, mixL, 2},
|
|
{mixRegulators, 0, mixR, 2},
|
|
|
|
{mixL, 0, dacs1, 0},
|
|
{mixR, 0, dacs1, 1},
|
|
|
|
FMVoiceWiring(Chanter),
|
|
FMVoiceWiring(Drones[0]),
|
|
FMVoiceWiring(Drones[1]),
|
|
FMVoiceWiring(Drones[2]),
|
|
FMVoiceWiring(Drones[3]),
|
|
FMVoiceWiring(Regulators[0]),
|
|
FMVoiceWiring(Regulators[1]),
|
|
FMVoiceWiring(Regulators[2]),
|
|
FMVoiceWiring(Regulators[3]),
|
|
};
|
|
|
|
int currentPatch = 0;
|
|
|
|
Adafruit_MPR121 cap = Adafruit_MPR121();
|
|
Adafruit_NeoTrellisM4 trellis = Adafruit_NeoTrellisM4();
|
|
MicroOLED oled(9, 1);
|
|
QwiicButton bag;
|
|
|
|
void setup() {
|
|
setupJustPitches(NOTE_D4, PITCH_D4);
|
|
pinMode(LED_BUILTIN, OUTPUT);
|
|
|
|
// Wire.begin needs a moment
|
|
delay(100);
|
|
Wire.begin();
|
|
|
|
// Initialize OLED display
|
|
oled.begin();
|
|
oled.clear(ALL);
|
|
|
|
// Initialize bag
|
|
bag.begin();
|
|
|
|
// Initialize the Trellis
|
|
trellis.begin();
|
|
|
|
// Initialize touch sensor
|
|
bool blink = true;
|
|
while (!cap.begin(0x5A)) {
|
|
oled.clear(PAGE);
|
|
oled.setCursor(0, 0);
|
|
oled.print("No Pipe?");
|
|
oled.display();
|
|
|
|
trellis.setPixelColor(0, blink?0xff6666:0);
|
|
blink = !blink;
|
|
delay(200);
|
|
}
|
|
|
|
// Set aside some memory for the audio library
|
|
AudioMemory(120);
|
|
|
|
// initialize tunables
|
|
updateTunables(3, 0);
|
|
|
|
// Initialize processor and memory measurements
|
|
AudioProcessorUsageMaxReset();
|
|
AudioMemoryUsageMaxReset();
|
|
|
|
#ifdef DEBUG
|
|
debug.amplitude(0.1);
|
|
mixL.gain(3, 0.1);
|
|
mixR.gain(3, 0.1);
|
|
#endif
|
|
}
|
|
|
|
#define BUTTON_UP 0
|
|
#define BUTTON_DOWN 8
|
|
#define BUTTON_PITCH 24
|
|
#define BUTTON_VOLUME 25
|
|
|
|
#define INIT_PITCH_ADJUST 0
|
|
#define INIT_GAIN 0.1
|
|
#define INIT_PATCH 0
|
|
|
|
int16_t pitchAdjust;
|
|
float gain;
|
|
int patch;
|
|
|
|
void updateTunables(uint8_t buttons, int note) {
|
|
// Pitch adjust if playing A
|
|
if (!note || (note == NOTE_A4)) {
|
|
switch (buttons) {
|
|
case 3:
|
|
pitchAdjust = INIT_PITCH_ADJUST;
|
|
break;
|
|
case 2:
|
|
pitchAdjust += 4;
|
|
break;
|
|
case 1:
|
|
pitchAdjust -= 4;
|
|
break;
|
|
}
|
|
}
|
|
|
|
float adj = pow(2, pitchAdjust / 32768.0);
|
|
setupJustPitches(NOTE_D4, PITCH_D4*adj);
|
|
trellis.setPixelColor(BUTTON_PITCH, trellis.ColorHSV(uint16_t(pitchAdjust), 255, 80));
|
|
|
|
if (!note || (note == NOTE_G4)) {
|
|
// Volume adjust if playing G
|
|
switch (buttons) {
|
|
case 3:
|
|
gain = INIT_GAIN;
|
|
break;
|
|
case 2:
|
|
gain = min(gain+0.005, 1.0);
|
|
break;
|
|
case 1:
|
|
gain = max(gain-0.005, 0.0);
|
|
break;
|
|
}
|
|
}
|
|
|
|
for (int i=0; i<3; i++) {
|
|
mixL.gain(i, gain);
|
|
mixR.gain(i, gain);
|
|
}
|
|
trellis.setPixelColor(BUTTON_VOLUME, trellis.ColorHSV(uint16_t(gain * 65535), 255, 80));
|
|
|
|
if (!note || (note == NOTE_CS5)) {
|
|
if (buttons == 3) {
|
|
patch = INIT_PATCH;
|
|
} else if (trellis.justPressed(BUTTON_DOWN)) {
|
|
patch -= 1;
|
|
} else if (trellis.justPressed(BUTTON_UP)) {
|
|
patch += 1;
|
|
}
|
|
|
|
// wrap
|
|
int bankSize = sizeof(Bank) / sizeof(Bank[0]);
|
|
patch = (patch + bankSize) % bankSize;
|
|
|
|
FMPatch *p = &Bank[patch];
|
|
FMVoiceLoadPatch(&Chanter, p);
|
|
|
|
oled.clear(PAGE);
|
|
oled.setFontType(0);
|
|
oled.setCursor(0, 0);
|
|
oled.print(p->name);
|
|
oled.setCursor(0, 10);
|
|
oled.print("Patch ");
|
|
oled.print(patch);
|
|
oled.display();
|
|
}
|
|
}
|
|
|
|
const uint8_t CLOSEDVAL = 0x30;
|
|
const uint8_t OPENVAL = 0x70;
|
|
const uint8_t GLISSANDO_STEPS = OPENVAL - CLOSEDVAL;
|
|
|
|
bool playing = false;
|
|
|
|
void loop() {
|
|
uint8_t keys = 0;
|
|
uint8_t note;
|
|
uint8_t glissandoKeys = 0;
|
|
uint8_t glissandoNote;
|
|
float glissandoOpenness = 0;
|
|
bool silent = false;
|
|
bool knee = cap.filteredData(KNEE_OFFSET) < CLOSEDVAL;
|
|
uint8_t buttons = trellis.isPressed(BUTTON_DOWN)?1:0 | trellis.isPressed(BUTTON_UP)?2:0;
|
|
|
|
trellis.tick();
|
|
|
|
for (int i = 0; i < 8; i++) {
|
|
uint16_t val = max(cap.filteredData(i+KEY_OFFSET), CLOSEDVAL);
|
|
float openness = ((val - CLOSEDVAL) / float(GLISSANDO_STEPS));
|
|
|
|
// keys = all keys which are at least touched
|
|
// glissandoKeys = all keys which are fully closed
|
|
// The glissando operation computes the difference.
|
|
if (openness < 1.0) {
|
|
glissandoOpenness = max(glissandoOpenness, openness);
|
|
bitSet(keys, i);
|
|
|
|
if (openness == 0.0) {
|
|
bitSet(glissandoKeys, i);
|
|
}
|
|
}
|
|
|
|
// print key states
|
|
//trellis.setPixelColor(7 - i, trellis.ColorHSV(65536/12, 255, 120*openness));
|
|
trellis.setPixelColor(7 - i, trellis.ColorHSV(22222*openness, 255, 40));
|
|
}
|
|
|
|
note = uilleann_matrix[keys];
|
|
glissandoNote = uilleann_matrix[glissandoKeys];
|
|
|
|
bool alt = note & 0x80;
|
|
bool galt = glissandoNote & 0x80;
|
|
note = note & 0x7f;
|
|
glissandoNote = glissandoNote & 0x7f;
|
|
|
|
// All keys closed + knee = no sound
|
|
if (knee) {
|
|
if (keys == 0xff) {
|
|
silent = true;
|
|
}
|
|
}
|
|
|
|
// Jump octave if the bag is squished
|
|
//bag = !digitalRead(BAG);
|
|
if (bag.isPressed()) {
|
|
if (keys & bit(7)) {
|
|
note += 12;
|
|
glissandoNote += 12;
|
|
}
|
|
}
|
|
|
|
// Read some trellis button states
|
|
if (buttons) {
|
|
updateTunables(buttons, note);
|
|
}
|
|
|
|
if (silent) {
|
|
FMVoiceNoteOff(&Chanter);
|
|
playing = false;
|
|
} else {
|
|
// Calculate pitch, and glissando pitch
|
|
uint16_t pitch = JustPitches[note];
|
|
uint16_t glissandoPitch = JustPitches[glissandoNote];
|
|
|
|
if (alt) {
|
|
biquad1.setLowShelf(0, 2000, 0.2, 1);
|
|
} else {
|
|
biquad1.setHighShelf(0, 1000, 1.0, 1);
|
|
}
|
|
|
|
// Bend pitch if fewer than 3 half steps away
|
|
if (abs(glissandoNote - note) < 3) {
|
|
float diff = glissandoPitch - pitch;
|
|
pitch += diff * glissandoOpenness;
|
|
}
|
|
|
|
if (playing) {
|
|
FMVoiceSetPitch(&Chanter, pitch);
|
|
} else {
|
|
FMVoiceNoteOn(&Chanter, pitch);
|
|
}
|
|
playing = true;
|
|
}
|
|
}
|