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diatonic-dreams.html
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diatonic-dreams.html
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<!DOCTYPE html>
<html lang="en" >
<head>
<meta charset="UTF-8">
<title>Diatonic Dreams</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
html, body, #app, .container {
width: 100%;
height: 100%;
margin: 0;
padding: 0;
overflow: hidden;
}
.loading {
position: fixed;
left: 0;
top: 0;
width: 100%;
height: 90%;
display: flex;
align-items: center;
justify-content: center;
color: white;
font-size: 40px;
}
/* Backgrounds from https://uigradients.com */
.container.scale-9 {
background: #085078; /* fallback for old browsers */
background: -webkit-linear-gradient(to right, #85D8CE, #085078); /* Chrome 10-25, Safari 5.1-6 */
background: linear-gradient(to right, #85D8CE, #085078); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
}
.container.scale-4 {
background: #FC466B; /* fallback for old browsers */
background: -webkit-linear-gradient(to right, #3F5EFB, #FC466B); /* Chrome 10-25, Safari 5.1-6 */
background: linear-gradient(to right, #3F5EFB, #FC466B); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
}
.container.scale-11 {
background: #c94b4b; /* fallback for old browsers */
background: -webkit-linear-gradient(to right, #4b134f, #c94b4b); /* Chrome 10-25, Safari 5.1-6 */
background: linear-gradient(to right, #4b134f, #c94b4b); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
}
.container.scale-6 {
background: #0f0c29; /* fallback for old browsers */
background: -webkit-linear-gradient(to right, #24243e, #302b63, #0f0c29); /* Chrome 10-25, Safari 5.1-6 */
background: linear-gradient(to right, #24243e, #302b63, #0f0c29); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
}
.container.scale-1 {
background: #00b09b; /* fallback for old browsers */
background: -webkit-linear-gradient(to right, #96c93d, #00b09b); /* Chrome 10-25, Safari 5.1-6 */
background: linear-gradient(to right, #96c93d, #00b09b); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
}
.container.scale-8 {
background: #36D1DC; /* fallback for old browsers */
background: -webkit-linear-gradient(to right, #5B86E5, #36D1DC); /* Chrome 10-25, Safari 5.1-6 */
background: linear-gradient(to right, #5B86E5, #36D1DC); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
}
.container.scale-3 {
background: #3C3B3F; /* fallback for old browsers */
background: -webkit-linear-gradient(to right, #605C3C, #3C3B3F); /* Chrome 10-25, Safari 5.1-6 */
background: linear-gradient(to right, #605C3C, #3C3B3F); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
}
.container.scale-10 {
background: #000000; /* fallback for old browsers */
background: -webkit-linear-gradient(to right, #0f9b0f, #000000); /* Chrome 10-25, Safari 5.1-6 */
background: linear-gradient(to right, #0f9b0f, #000000); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
}
.container.scale-5 {
background: # ; /* fallback for old browsers */
background: -webkit-linear-gradient(to right, #ffc0cb, #800080); /* Chrome 10-25, Safari 5.1-6 */
background: linear-gradient(to right, #ffc0cb, #800080); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
}
.container.scale-0 {
background: #00F260; /* fallback for old browsers */
background: -webkit-linear-gradient(to right, #0575E6, #00F260); /* Chrome 10-25, Safari 5.1-6 */
background: linear-gradient(to right, #0575E6, #00F260); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
}
.container.scale-7 {
background: #CB356B; /* fallback for old browsers */
background: -webkit-linear-gradient(to right, #BD3F32, #CB356B); /* Chrome 10-25, Safari 5.1-6 */
background: linear-gradient(to right, #BD3F32, #CB356B); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
}
.container.scale-2 {
background: #03001e; /* fallback for old browsers */
background: -webkit-linear-gradient(to right, #fdeff9, #ec38bc, #7303c0, #03001e); /* Chrome 10-25, Safari 5.1-6 */
background: linear-gradient(to right, #fdeff9, #ec38bc, #7303c0, #03001e); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
}
.visualizations {
width: 100%;
height: calc(100% - 120px);
position: relative;
}
.visualization {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
}
.controls {
height: 120px;
width: 100%;
display: flex;
align-items: center;
font-family: sans-serif;
background-color: rgba(0, 0, 0, 0.25);
overflow-x: auto;
overflow-y: hidden;
}
.control {
padding: 10px 20px;
color: white;
text-align: center;
}
.control.flush-right {
margin-left: auto;
}
.control-label {
padding: 5px;
min-height: 23px;
line-height: 23px;
}
@media only screen and (max-width: 600px) {
.control-label {
font-size: 9px;
min-height: 15px;
line-height: 15px;
}
}
.key {
opacity: 0.075;
}
.key.active {
opacity: 0.7;
}
.note {
fill: black;
font-size: 10px;
pointer-events: none;
opacity: 0.1;
}
.note.active {
opacity: 0.7;
}
.note.accidental {
fill: white;
}
.triad {
fill: white;
}
.triad-chord {
pointer-events: none;
font-size: 12px;
font-weight: bold;
}
.loop, .loop-triad-touch-point {
stroke-width: 2;
}
.loop-triad-touch-point.current {
stroke-width: 4;
}
.loop.building {
stroke: rgba(255, 255, 255, 0.9);
fill: none;
}
</style>
<script>
window.console = window.console || function(t) {};
</script>
<script>
if (document.location.search.match(/type=embed/gi)) {
window.parent.postMessage("resize", "*");
}
</script>
</head>
<body translate="no" >
<div id="app"></div>
<script src="https://static.codepen.io/assets/common/stopExecutionOnTimeout-157cd5b220a5c80d4ff8e0e70ac069bffd87a61252088146915e8726e5d9f147.js"></script>
<script src='https://cdn.jsdelivr.net/npm/[email protected]/lodash.min.js'></script>
<script src='https://cdn.jsdelivr.net/npm/[email protected]/build/Tone.min.js'></script>
<script src='https://cdn.jsdelivr.net/npm/[email protected]/dist/inferno.js'></script>
<script src='https://cdn.jsdelivr.net/npm/[email protected]/dist/inferno-hyperscript.min.js'></script>
<script src='https://cdn.jsdelivr.net/npm/[email protected]/dist/inferno-component.min.js'></script>
<script src='https://cdn.jsdelivr.net/npm/[email protected]/dist/NexusUI.min.js'></script>
<script src='https://cdn.jsdelivr.net/npm/[email protected]/TweenMax.min.js'></script>
<script src='https://cdn.jsdelivr.net/npm/[email protected]/TimelineLite.min.js'></script>
<script src='https://cdn.jsdelivr.net/npm/[email protected]/StartAudioContext.min.js'></script>
<script id="rendered-js" >
const COL_INTERLEAVING = 0.85;
const ROWS = window.innerHeight > 500 ? 8 : 6;
const COLS = calculateAppropriateColCount(
window.innerWidth,
window.innerHeight);
const MINOR_THIRD = 3;
const MAJOR_THIRD = 4;
const MODES = [
{ name: "Ionian", intervals: [2, 2, 1, 2, 2, 2, 1] },
{ name: "Dorian", intervals: [2, 1, 2, 2, 2, 1, 2] },
{ name: "Phrygian", intervals: [1, 2, 2, 2, 1, 2, 2] },
{ name: "Lydian", intervals: [2, 2, 2, 1, 2, 2, 1] },
{ name: "Mixolydian", intervals: [2, 2, 1, 2, 2, 1, 2] },
{ name: "Aeolian", intervals: [2, 1, 2, 2, 1, 2, 2] },
{ name: "Locrian", intervals: [1, 2, 2, 1, 2, 2, 2] }];
const PERFECT_FIFTH = 7;
const START_NOTE = Tone.Frequency("C#3").toMidi();
const TICK_DURATION = "8n";
const TICKS_PER_INTERACTION = 4;
const PATTERN_TICK_LENGTH = 16;
const PATTERN_DEVELOPMENT_RATE = 0.1;
let loading = true;
let tick = 0;
let interactionTick = 0;
let controls = {
keySig: 3,
mode: 0,
voices: 4,
density: 0.4 };
let scale = buildScale();
let keyboard = updateKeyCoordinates(
buildKeyboard(),
window.innerWidth,
window.innerHeight);
let triads = buildTriads();
let loops = [];
let cursorPosition = { isDown: false, triad: null };
let loopTicker = null,
loopTickerStartTime = null;
Nexus.colors.fill = "rgba(255, 255, 255, 0.9)";
function buildKeyboard() {
let keyboard = [];
for (let colNum = 0; colNum < COLS; colNum++) {if (window.CP.shouldStopExecution(0)) break;
let down = Math.ceil(colNum / 2);
let up = Math.floor(colNum / 2);
let startNote = START_NOTE + -1 * MINOR_THIRD * down + MAJOR_THIRD * up;
let col = [];
let startRow = colNum % 2 === 0 ? 1 : 0;
for (let rowNum = startRow; rowNum < ROWS * 2; rowNum += 2) {if (window.CP.shouldStopExecution(1)) break;
let note = startNote + PERFECT_FIFTH * (rowNum - startRow) / 2;
col[rowNum] = { note, colNum, rowNum };
}window.CP.exitedLoop(1);
keyboard.push(col);
}window.CP.exitedLoop(0);
return keyboard;
}
function calculateAppropriateColCount(width, height) {
let availableHeight = height - 120;
let availableHeightPerRow = availableHeight / (ROWS + 0.5);
return Math.min(
35,
Math.floor(width / COL_INTERLEAVING / availableHeightPerRow) - 1);
}
function updateKeyCoordinates(keyboard, width, height) {
let availableHeight = height - 120;
let maxKeyWidth = width / keyboard.length / COL_INTERLEAVING;
let maxKeyHeight = availableHeight / (ROWS + 0.5);
let keySize = Math.min(maxKeyWidth, maxKeyHeight);
let marginLeft = (width - keySize * keyboard.length * COL_INTERLEAVING) / 2;
let marginTop = (availableHeight - keySize * (ROWS + 0.5)) / 2;
let polyAngle = 2 * Math.PI / 6;
return keyboard.map((col, colNum) =>
col.map((key, rowNum) => {
if (key) {
let x = marginLeft + keySize * colNum * COL_INTERLEAVING;
let y = availableHeight - keySize / 2 * (rowNum + 2) - marginTop;
let r = keySize / 2 + 3;
let polyPoints = _.times(6, i => {
let px = x + r + r * Math.cos(polyAngle * i);
let py = y + r + r * Math.sin(polyAngle * i);
return [px, py];
});
return { ...key, pos: { x, y, r }, polyPoints };
}
}));
}
function buildTriads() {
let triads = [];
for (let colNum = 0; colNum < keyboard.length; colNum++) {if (window.CP.shouldStopExecution(2)) break;
let col = keyboard[colNum];
for (let rowNum = 0; rowNum < ROWS * 2; rowNum++) {if (window.CP.shouldStopExecution(3)) break;
let key = col[rowNum];
if (!key || !isActive(key.note)) continue;
let firstInterval = isActive(key.note + MAJOR_THIRD) ?
MAJOR_THIRD :
MINOR_THIRD;
let secondInterval = isActive(key.note + firstInterval + MAJOR_THIRD) ?
MAJOR_THIRD :
MINOR_THIRD;
let firstThird;
if (firstInterval === MAJOR_THIRD && colNum < keyboard.length - 1) {
firstThird = keyboard[colNum + 1][rowNum + 1];
} else if (firstInterval === MINOR_THIRD && colNum > 0) {
firstThird = keyboard[colNum - 1][rowNum + 1];
}
let secondThird;
if (firstInterval + secondInterval === PERFECT_FIFTH) {
secondThird = keyboard[colNum][rowNum + 2];
} else if (colNum > 1) {
secondThird = keyboard[colNum - 2][rowNum + 2];
}
if (firstThird && secondThird) {
let triad = makeTriad([key, firstThird, secondThird]);
triads.push(triad);
}
}window.CP.exitedLoop(3);
}window.CP.exitedLoop(2);
return triads;
}
function makeTriad(keys) {
let id = _.uniqueId("triad");
let r = keys[0].pos.r / 2.1;
let xSum = 0,
ySum = 0;
for (let key of keys) {
xSum += key.pos.x + key.pos.r;
ySum += key.pos.y + key.pos.r;
}
let centerX = xSum / keys.length;
let centerY = ySum / keys.length;
let pos = { x: centerX, y: centerY, r };
let chordNumber = getChordNumber(keys[0]);
return { id, keys, pos, chordNumber };
}
function isActive(note) {
let pc = note % 12;
return scale.some(v => v === pc);
}
function buildScale() {
return MODES[controls.mode].intervals.reduce(
(pcs, interval) => (pcs.push((pcs[pcs.length - 1] + interval) % 12), pcs),
[controls.keySig * 7 % 12]);
}
function migrateLoopsToCurrentTriads() {
let occupiedTriadIds = new Set();
loops = loops.map(loop => ({
...loop,
triads: loop.triads.map(loopTriad => {
let triad = findClosestMatchingTriad(
loopTriad.origTriad || loopTriad.triad,
occupiedTriadIds);
occupiedTriadIds.add(triad.id);
return {
...loopTriad,
origTriad: loopTriad.origTriad || loopTriad.triad,
triad };
}) }));
}
function addNewVoice() {
let occupiedTriadIds = new Set(
_.flatMap(loops, l => l.triads.map(t => t.triad.id)));
let seed = _.last(loops);
let newLoop = {
...seed,
triads: seed.triads.map(_.clone),
closed: true,
harmonizing: true };
for (let loopTriad of newLoop.triads) {
loopTriad.triad = findRandomMatchingTriad(
loopTriad.triad,
occupiedTriadIds);
loopTriad.origTriad = loopTriad.triad;
occupiedTriadIds.add(loopTriad.triad.id);
}
loops = [...loops, newLoop];
}
function findClosestMatchingTriad(triad, occupiedTriadIds) {
let matchingTriads = triads.filter(
t => !occupiedTriadIds.has(t.id) && t.chordNumber === triad.chordNumber);
let minNew,
minNoteDist = Number.MAX_VALUE;
for (let newTriad of matchingTriads) {
let noteDist = Math.abs(newTriad.keys[0].note - triad.keys[0].note);
if (noteDist <= minNoteDist) {
minNoteDist = noteDist;
if (minNew) {
let visualDist = getEuclideanDistance(newTriad.pos, triad.pos);
let minVisualDist = getEuclideanDistance(minNew.pos, triad.pos);
if (visualDist < minVisualDist) {
minNew = newTriad;
}
} else {
minNew = newTriad;
}
}
}
return minNew;
}
function getEuclideanDistance(p1, p2) {
return Math.sqrt((p1.x - p2.x) ** 2 + (p1.y - p2.y) ** 2);
}
function findRandomMatchingTriad(triad, occupiedTriadIds) {
let matching = _.filter(
triads,
t => !occupiedTriadIds.has(t.id) && t.chordNumber === triad.chordNumber);
return pickRandomTriad(matching, occupiedTriadIds);
}
function findRandomMatchingTriadWithRoot(triad, root, occupiedTriadIds) {
let matching = triads.filter(
(t) =>
!occupiedTriadIds.has(t.id) &&
t.chordNumber === triad.chordNumber &&
t.keys[0].note === root);
return pickRandomTriad(matching, occupiedTriadIds);
}
function pickRandomTriad(triads) {
if (triads.length === 0) return null;
return triads[Math.floor(Math.random() * triads.length)];
}
function updateCursorPosition(update) {
cursorPosition = {
...cursorPosition,
...update };
}
function openNewLoops(voices) {
return _.times(voices, voice => ({
currentTick: -1,
triads: [],
pattern: generateLoopPattern(),
closed: false,
harmonizing: voice > 0 }));
}
function getOpenLoops(loops) {
return loops.filter(loop => !loop.closed);
}
function getClosedLoops(loops) {
return loops.filter(loop => loop.closed);
}
function getPrimaryOpenLoop(loops) {
return _.find(getOpenLoops(loops), { harmonizing: false });
}
function getHarmonizingOpenLoops(loops) {
return _.filter(getOpenLoops(loops), { harmonizing: true });
}
function loopTick(time) {
let onTime =
time - Tone.now() >= 0 || Tone.Transport.seconds === loopTickerStartTime;
loops = tickLoops(loops);
if (tick % TICKS_PER_INTERACTION === 0) {
loops = closeAndPruneLoops(loops);
loops = buildLoopTriadsInOpenLoops(loops);
loops = updateTriadPlayTimes(loops);
loops = updateLoopPatterns(loops);
interactionTick++;
}
if (onTime) {
loops = playLoops(time);
Tone.Draw.schedule(render, time);
}
tick++;
if (loops.length === 0) {
Tone.Transport.clear(loopTicker);
loopTicker = null;
}
}
function tickLoops(loops) {
return loops.map(loop => ({
...loop,
currentTick: loop.currentTick + 1 }));
}
function closeAndPruneLoops(loops, time) {
if (!cursorPosition.isDown) {
return loops.
filter(
loop => !loop.closed && loop.currentTick < 1 || loop.triads.length > 1).
map(loop => loop.closed ? loop : closeLoop(loop, time));
} else {
return loops;
}
}
function closeLoop(loop, time) {
return {
...loop,
closed: true,
endedAt: loop.currentTick,
currentTick: 0,
triads: loop.triads.map(loopTriad => ({
...loopTriad,
endedAt: loopTriad.endedAt || loop.currentTick })) };
}
function buildLoopTriadsInOpenLoops(loops) {
if (cursorPosition.isDown && getOpenLoops(loops).length > 0) {
let primary = getPrimaryOpenLoop(loops);
let newTriadForPrimary = findNewTriadFromCursorPosition(primary);
if (newTriadForPrimary) {
let harmonizing = getHarmonizingOpenLoops(loops);
let closed = getClosedLoops(loops);
let newPrimary = addNextTriadToLoop(primary, newTriadForPrimary);
let rootDelta = getLastRootDelta(newPrimary);
let occupiedTriadIds = new Set([newTriadForPrimary.id]);
let newHarmonizing = harmonizing.map((loop, idx) => {
let matchingTriad;
if (rootDelta) {
let nextRoot = getNextRoot(loop, rootDelta, idx);
matchingTriad = findRandomMatchingTriadWithRoot(
newTriadForPrimary,
nextRoot,
occupiedTriadIds);
}
if (!matchingTriad) {
matchingTriad = findRandomMatchingTriad(
newTriadForPrimary,
occupiedTriadIds);
}
occupiedTriadIds.add(matchingTriad.id);
return addNextTriadToLoop(loop, matchingTriad);
});
return [...closed, newPrimary, ...newHarmonizing];
}
}
return loops;
}
function findNewTriadFromCursorPosition(loop) {
let newTriad = cursorPosition.triad;
if (
newTriad && (
loop.triads.length === 0 || newTriad !== _.last(loop.triads).triad))
{
return newTriad;
} else {
return null;
}
}
function addNextTriadToLoop(loop, newTriad) {
return {
...loop,
triads: loop.triads.
map(loopTriad => ({
...loopTriad,
endedAt: Math.max(0, loopTriad.endedAt || loop.currentTick) })).
concat([
{
triad: newTriad,
startedAt: Math.max(0, loop.currentTick) }]) };
}
function getLastRootDelta(loop) {
if (loop.triads.length > 1) {
let last = loop.triads[loop.triads.length - 1];
let secondToLast = loop.triads[loop.triads.length - 2];
return last.triad.keys[0].note - secondToLast.triad.keys[0].note;
}
return null;
}
function getNextRoot(loop, rootDelta, harmonyIndex) {
let last = loop.triads[loop.triads.length - 1];
if (harmonyIndex % 2 === 0) {
// If original went up, go down, and vice versa.
// First follow original, then go up/down by an octave.
let octaveShift = rootDelta > 0 ? -12 : 12;
return last.triad.keys[0].note + rootDelta + octaveShift;
} else {
// Just follow originah progression.
return last.triad.keys[0].note + rootDelta;
}
}
function updateTriadPlayTimes(loops) {
return loops.map(loop => ({
...loop,
triads: loop.triads.map(loopTriad => {
let start = loopTriad.startedAt;
let end = loop.endedAt ?
loopTriad.endedAt % loop.endedAt :
loopTriad.endedAt;
let loopedTick = loop.endedAt ?
loop.currentTick % loop.endedAt :
loop.currentTick;
return {
...loopTriad,
isCurrent: loopedTick >= start && (!end || loopedTick < end) };
}) }));
}
function updateLoopPatterns(loops) {
return loops.map(loop => ({
...loop,
pattern: loop.pattern.map(patternStep => {
let newNote =
patternStep.note && Math.random() > PATTERN_DEVELOPMENT_RATE ?
patternStep.note :
{
note: pickNote(patternStep),
velocity: pickVelocity(patternStep) };
return { ...patternStep, note: newNote };
}) }));
}
function pickNote(patternStep) {
return Math.random() < controls.density * patternStep.noteProb ?
Math.floor(Math.random() * 3) :
null;
}
function pickVelocity(patternStep) {
if (patternStep.beat === 0) {
// upbeat
return Math.random() < 0.75 ? 0.7 : 0.4;
} else {
// downbeat (occasional syncopation)
return Math.random() < 0.25 ? 0.7 : 0.4;
}
}
function playLoops(time) {
return loops.map((loop, idx) => {
let downKey = getCurrentDownKey(loop);
if (downKey) {
playNote(downKey.key, time, downKey.velocity, idx);
}
return { ...loop, downKey };
});
}
function getCurrentDownKey(loop) {
let loopBeat = loop.currentTick % PATTERN_TICK_LENGTH;
for (let loopTriad of loop.triads) {
if (loopTriad.isCurrent) {
for (let { beat, note } of loop.pattern) {
if (note.note !== null && beat === loopBeat) {
return {
key: loopTriad.triad.keys[note.note],
velocity: note.velocity };
}
}
}
}
return null;
}
function playNote(key, time, velocity, loopIdx) {
let pan = -0.5 + (key.colNum + 0.5) / keyboard.length;
playOutput(key.note, time, velocity, pan, loopIdx);
}
function generateLoopPattern() {
return _.range(0, PATTERN_TICK_LENGTH).map(beat => {
let fracBeat = beat % 4;
let noteProb = fracBeat === 0 ? 2.0 : 1.0;
return {
beat,
noteProb };
});
}
function getTriadNumeral([one, two, three]) {
let chordNumber = getChordNumber(one);
let numeral = toRoman(chordNumber + 1);
if (two.note - one.note < MAJOR_THIRD) {
numeral = numeral.toLowerCase();
}
if (three.note - one.note < PERFECT_FIFTH) {
numeral += "\u00B0";
}
return numeral;
}
function getChordNumber(key) {
return scale.indexOf(key.note % 12);
}
function toRoman(n) {
switch (n) {
case 1:
return "I";
case 2:
return "II";
case 3:
return "III";
case 4:
return "IV";
case 5:
return "V";
case 6:
return "VI";
case 7:
return "VII";}
}
function fetchSample(url) {
return new Promise((succ, err) => new Tone.Buffer(url, succ, err));
}
let outputs = {
synth: {
supported: true,
sampleScale: _.range(
new Tone.Frequency("A#2").toMidi(),
new Tone.Frequency("C#8").toMidi() + 1,
3).
map((note, index) => ({ note, index })),
enable: function () {
this._masterGain = Tone.context.createGain();
this._masterGain.gain.value = 0;
this._masterGain.connect(Tone.context.destination);
return Promise.all([
fetchSample("https://s3-us-west-2.amazonaws.com/s.cdpn.io/969699/nebulae-scale-sparse-low-mono.mp3"),
fetchSample("https://s3-us-west-2.amazonaws.com/s.cdpn.io/969699/nebulae-scale-sparse-mono.mp3")]).
then(([lowBuf, buf]) => {
this._lowBuffer = lowBuf.get();
this._buffer = buf.get();
}).
catch(e => console.error(e));
},
disable: function () {
this._buffer = null;
},
play: function (note, time, velocity, pan, loopIdx) {
if (this._buffer) {
let noteDuration = this._buffer.duration / this.sampleScale.length;
let sample = _.minBy(this.sampleScale, (sample) =>
Math.abs(sample.note - note));
let noteOffset = sample.index * noteDuration;
let distanceToSample = note - sample.note;
let playbackRate = 2 ** (distanceToSample / 12);
let src = Tone.context.createBufferSource();
src.buffer = velocity < 0.5 ? this._lowBuffer : this._buffer;
//src.buffer = this._buffer;
src.playbackRate.value = playbackRate;
let panner = Tone.context.createStereoPanner();
panner.pan.value = pan;
src.connect(Tone.context.destination);
panner.connect(this._masterGain);
src.start(time, noteOffset, noteDuration - 0.1);
if (this._masterGain.gain.value === 0) {
this._masterGain.gain.setTargetAtTime(1.0, Tone.now(), 0.5);
}
}
} },
midi: {
supported: !!navigator.requestMIDIAccess,
enable: function () {
return navigator.requestMIDIAccess().then(midiAccess => {
this._output = midiAccess.outputs.entries().next().value[1];
this._startScheduler = Tone.Transport.scheduleRepeat(time => {
const firstTickAfter = time - Tone.now();
const firstTickAt = window.performance.now() + firstTickAfter * 1000;
this._output.send([0xfa], firstTickAt);
}, "1m");
this._tickScheduler = Tone.Transport.scheduleRepeat(time => {
const firstTickAfter = time - Tone.now();
const firstTickAt = window.performance.now() + firstTickAfter * 1000;
const sixteenthSeconds = new Tone.Time("16n").toSeconds();
const ticks = 24 / 4;
for (let i = 0; i < ticks; i++) {if (window.CP.shouldStopExecution(4)) break;
let t = firstTickAt + sixteenthSeconds / ticks * i * 1000;
this._output.send([0xf8], t);
}window.CP.exitedLoop(4);
}, "16n");
});
},
disable: function () {
Tone.Transport.clear(this._startScheduler);
Tone.Transport.clear(this._tickScheduler);
},
play: function (note, time, velocity, pan, channel = 0) {
if (!this._output) return;
const onAfter = new Tone.Time(time).toSeconds() - Tone.now();
const onAt = window.performance.now() + onAfter * 1000;
let noteOn = [145 + channel, note, velocity * 127];
let noteOff = [128 + channel, note, 0x00];
this._output.send(noteOn, onAt);
this._output.send(noteOff, onAt + new Tone.Time("4n").toSeconds() * 1000);
} } };
function activateOutput(name) {
if (controls.output) {
outputs[controls.output].disable();
}
controls.output = name;
return outputs[name].enable();
}
function playOutput(...args) {
outputs[controls.output].play(...args);
}
const { h } = Inferno;
Inferno.options.recyclingEnabled = true;
function onMouseDown(evt) {
updateCursorPosition({ isDown: true });
loops = buildLoopTriadsInOpenLoops(openNewLoops(controls.voices));
if (!_.isNull(loopTicker)) {
Tone.Transport.clear(loopTicker);
let runtime = Tone.Transport.seconds - loopTickerStartTime;
let singleTickTime = new Tone.TransportTime(TICK_DURATION).toSeconds();
let fullTicks = Math.ceil(runtime / singleTickTime);
loopTickerStartTime =
Tone.Transport.seconds + fullTicks * singleTickTime - runtime;
} else {
loopTickerStartTime = Tone.Transport.seconds;
}
tick = 0;
interactionTick = 0;
loopTicker = Tone.Transport.scheduleRepeat(
loopTick,
TICK_DURATION,
loopTickerStartTime);
evt.preventDefault();
}
function onMouseUp(evt) {
updateCursorPosition({ isDown: false });
evt.preventDefault();
}
function onMouseOverTriad(evt) {
onEnterTriad(evt.currentTarget.id);
}
function onMouseOutOfTriad(evt) {
onLeaveTriad(evt.currentTarget.id);
}
function onTouchStart(evt) {
onMouseDown(evt);
let touch = evt.touches[0];
let el = document.elementFromPoint(touch.pageX, touch.pageY);
if (el.id && el.id.startsWith("triad")) {
onEnterTriad(el.id);
}
}
function onTouchMove(evt) {
let touch = evt.touches[0];
let el = document.elementFromPoint(touch.pageX, touch.pageY);
if (el.id && el.id.startsWith("triad")) {
onEnterTriad(el.id);
} else {
onLeaveTriad();
}
evt.preventDefault();
}
function onTouchEnd(evt) {
onMouseUp(evt);
onLeaveTriad();
}
function onEnterTriad(id) {
let triad = _.find(triads, { id });
updateCursorPosition({ triad });
}
function onLeaveTriad(id) {
let triad = _.find(triads, { id });
if (!id || cursorPosition.triad === triad) {
updateCursorPosition({ triad: null });
}
}
function onKeySigChange(value) {
controls.keySig = value;
scale = buildScale();
triads = buildTriads();
migrateLoopsToCurrentTriads();
render();
}
function onModeChange(value) {
controls.mode = value;
scale = buildScale();
triads = buildTriads();
migrateLoopsToCurrentTriads();
render();
}
function onVoicesChange(value) {
controls.voices = value;
if (controls.voices < loops.length) {
loops.length = controls.voices;
} else if (loops.length > 0) {
while (loops.length < controls.voices) {if (window.CP.shouldStopExecution(5)) break;
addNewVoice();
}window.CP.exitedLoop(5);
}
render();
}
function onDensityChange(value) {
controls.density = value;
render();
}
function onTempoChange(value) {
Tone.Transport.bpm.value = value;
render();
}
function onOutputChange(value) {
activateOutput(value);
render();
}
function App({
loading,
keyboard,
triads,
loops,
controls,
scale,
interactionTick })
{
return h("div", { className: `container scale-${scale[0]}` }, [
h(Visualization, {
keyboard,
triads,
loops,
keySig: controls.keySig,
scale,