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index.htm
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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<!--[if lt IE 9]>
<script src="//html5shiv.googlecode.com/svn/trunk/html5.js"></script>
<![endif]-->
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no">
<title>Fretboard emulator</title>
<link href='https://fonts.gstatic.com' rel='preconnect'/>
<link href='https://fonts.googleapis.com/css2?family=Averia+Serif+Libre:ital,wght@0,300;0,400;0,700;1,300;1,400;1,700&display=swap' rel='stylesheet'/>
<link href='https://fonts.googleapis.com/icon?family=Material+Icons' rel='stylesheet'/>
<style>
@font-face {
font-family: "DejaVu";
src: url("/vocalise/fonts/dejavu/DejaVuSansMono.ttf") format("truetype");
}
@font-face {
font-family: "DejaVuBold";
src: url("/vocalise/fonts/dejavu/DejaVuSansMono-Bold.ttf") format("truetype");
}
@font-face {
font-family: "DejaVuSans";
src: url("/vocalise/fonts/dejavu/DejaVuSans.ttf") format("truetype");
}
@font-face {
font-family: "DejaVuSansBold";
src: url("/vocalise/fonts/dejavu/DejaVuSans-Bold.ttf") format("truetype");
}
* {
-webkit-font-smoothing: antialiased;
text-rendering: optimizeLegibility;
font-family: 'Averia Serif Libre', serif;
font-size:14px;
}
body {
margin:0;
padding:0;
background:black;
background-repeat: repeat;
touch-action: none;
}
a {
color:gray;
}
#toolbar {
height:32px;
min-width:600px;
position:fixed;
bottom:0;
left:0;
}
#tuning {
position:fixed;
right:0;
top:64px;
}
#toolbar a, #tuning a {
padding: 2px;
}
#toolbar i, #tuning i {
line-height: 1em;
font-size: 24px;
color: white;
}
audio {
height: 16px;
width: 200px;
margin: 4px;
}
#openCsv {
display:none;
}
#midiIn, #sampleRate {
vertical-align: top;
width: 128px;
height: 16px;
line-height: 1em;
font-size: 14px;
margin: 4px;
padding: 0;
border: 0;
}
#sampleRate {
width: 64px;
}
#tuners {
display:none;
min-width:1600px;
position:absolute;
left:0;
top:0;
}
.tuner {
background-color:rgba(0,0,0,0.5);
display:inline-block;
text-align:center;
font-weight:bold;
font-size:13px;
float:left;
height: 63px;
width: 62px;
border:0;
padding:0;
margin:0 1px;
color:lightgray;
}
.tuner select {
border:0;
padding:0;
margin:8px 0;
font-size:14px;
}
.tuner input {
text-align:center;
font-weight:bold;
width:28px;
height:16px;
font-size:14px;
background-color:transparent;
color:white;
border:0;
padding:0;
margin:8px 0;
}
#keys {
width:1600px;
height:1536px;
overflow:hidden;
clear:both;
margin:0;
padding:0;
background-image: repeating-linear-gradient(0deg, transparent 0px, rgba(255,255,255,0.25) 2.67px, transparent 5.33px), url(texture.png);
}
.key {
float:left;
width:64px;
height:1536px;
border:0;
margin:0;
padding:0;
background-image: linear-gradient(90deg, transparent 0%, transparent 49%, white 50%, transparent 51%, transparent 100%), repeating-linear-gradient(0deg, transparent 0%, transparent 4.17%, rgba(0,0,0,0.5) 4.17%, rgba(0,0,0,0.5) 8.33%, transparent 8.33%, transparent 12.50%, rgba(0,0,0,0.5) 12.50%, rgba(0,0,0,0.5) 16.67%, transparent 16.67%, transparent 20.83%, rgba(0,0,0,0.5) 20.83%, rgba(0,0,0,0.5) 25.00%, transparent 25.00%, transparent 29.17%, transparent 29.17%, transparent 33.33%, rgba(0,0,0,0.5) 33.33%, rgba(0,0,0,0.5) 37.50%, transparent 37.50%, transparent 41.67%, rgba(0,0,0,0.5) 41.67%, rgba(0,0,0,0.5) 45.83%, transparent 45.83%, transparent 50%);
background-position: 0 0px;
}
#offset {
position:absolute;
top:64px;
left:0;
width:26px;
height:12px;
border: 1px dashed gray;
padding:2px;
margin:0;
background-color: transparent;
color: white;
text-align: center;
font-weight:bold;
}
#ruler_v {
overflow: hidden;
position:absolute;
top:80px;
left:0;
height:1536px;
width:16px;
}
#ruler_h {
overflow: hidden;
position:absolute;
top:64px;
left:32px;
height:16px;
width:1600px;
}
#ruler_v hr {
margin:0;
padding:0;
border:0;
background-color:white;
width:16px;
height:1px;
position:absolute;
}
#ruler_h hr {
margin:0;
padding:0;
border:0;
background-color:white;
width:1px;
height:16px;
position:absolute;
}
#notice {
background-color:white;
text-align:center;
width:256px;
position:fixed;
bottom:64px;
right:0px;
padding:8px;
}
#close {
color:white;
float:left;
margin-left: -32px;
margin-right: 0;
}
#hl {
position:absolute;
font-weight:bold;
z-index:-1;
}
#txt, #hl {
white-space:pre-wrap;
letter-spacing:0;
line-height:1em;
overflow:scroll;
font-family: 'DejaVu', monospace;
background-color:transparent;
font-size: 14px;
margin: 0px;
padding: 2px;
height: 64px;
width: 256px;
border: 1px dashed lightgray;
resize: none;
}
#switch_n {
font-size:48px;
height:64px;
width: 0px;
position: absolute;
right:0;
border:0;
padding:0 24px 0 0;
margin:0;
background-color:transparent;
}
#notice div {
width:256px;
overflow:scroll;
}
#notice ul {
list-style-type: none;
padding: 0;
margin: 0;
}
#notice li {
float:left;
width:48px;
}
#notice .n {
max-width:16px;
font-weight:bold;
}
#markers {
height:1.5em;
width:1600px;
font-size:12px;
}
#markers span {
position:absolute;
}
</style>
</head>
<body onload="newEq();parse();highlight();addMarkers();" oncontextmenu="return false;" ondragstart="event.preventDefault();" onkeydown="if(kbrd[event.key]){playNote(kbrd[event.key][0], kbrd[event.key][1]*64, 32.0, 16, 16);}" onkeyup="if(kbrd[event.key]){stopNote(kbrd[event.key][0]);}" onwheel="setAmp(event);">
<div id="markers"></div>
<div id="toolbar">
<a title="On / Off" href="javascript:init(sampleRate.value);"><i id='play' class='material-icons notranslate'>power_settings_new</i></a><a title="Scale" href="javascript:if(l===false){l=true;}else{l=false;}scale();"><i id='scale' class='material-icons notranslate'>line_weight</i></a><audio controls></audio><a title="Record" href="javascript:record();"><i id='rec' class='material-icons notranslate'>fiber_manual_record</i></a><a title="Tuning" href="javascript:showTuning();"><i id="tune" class='material-icons notranslate'>tune</i></a>
<select title="Sample rate" id="sampleRate" onchange="ac=null;init(this.value);">
<option value="8000" selected="true">8000</option>
<option value="11025">11025</option>
<option value="16000">16000</option>
<option value="22050">22050</option>
<option value="44100">44100</option>
<option value="48000">48000</option>
<option value="96000">96000</option>
</select>
<select title="MIDI input" id="midiIn" onchange="selectMIDIIn(event);"></select>
</div>
<div id="tuners">
<input id="offset" type="number" min="1" max="16" step="1" value="1" onchange="off=parseInt(this.value);"/>
<div id="ruler_v"><hr style='top:4096px;background-color:transparent;'/></div>
<div id="ruler_h"><hr style='left:8192px;background-color:transparent;'/></div>
<div id="tuning">
<a title="Save tuning" href="javascript:saveTuning();"><i class='material-icons notranslate'>audio_file</i></a><a id="csv"></a><a title="Open tuning" href="javascript:openTuning();"><i class='material-icons notranslate'>file_open</i></a><input type="file" id="openCsv" onchange="openTuning();"/>
</div>
</div>
<div id="keys"></div>
<div id="notice">
<a id="close" href="#" onclick="showPopup();"><i class="material-icons notranslate">keyboard_double_arrow_right</i></a>
<i>Optimized for touchscreen devices but supports MIDI, mouse and keyboard.<br/>
<i class="material-icons notranslate">touch_app</i> <i class="material-icons notranslate">piano</i> <i class="material-icons notranslate">ads_click</i> <i class="material-icons notranslate">keyboard</i><br/>
If anything is broken, please <a href="https://browsehappy.com/" target="_blank">update</a> your browser and <a href="https://freeali.se/contact.htm" target="_blank">report</a> it.</i>
<canvas id="canvas" width="256" height="16"></canvas>
<ul><li class="n">f:</li><li id="f_">_</li><li class="n">v:</li><li id="v_">_</li><li class="n">rx:</li><li id="rx_">_</li><li class="n">ry:</li><li id="ry_">_</li></ul>
<textarea id="hl"></textarea>
<textarea id="txt" onkeyup="highlight();hl.scrollTo(0,this.scrollTop);" onchange="newEq();parse();note_n=0;switch_n.focus();" onscroll="hl.scrollTo(0,this.scrollTop);">Math.sin(y)/(x+1)</textarea>
<div><input type="number" id="switch_n" max="0" min="-19200" onchange="switchNote(this.value);"><canvas id="chart" width="2048" height="64" onclick="switch_n.focus();"></canvas></div>
</div>
<script type="text/javascript" src="midi.js"></script>
<script type="text/javascript" src="frequency-visualizer.js"></script>
<script>
var canvas = document.getElementById("canvas");
var chart = document.getElementById("chart");
var ctx = chart.getContext("2d");
ctx.fillStyle = '#ffffff';
ctx.strokeStyle = 'lightgray';
var markers = document.getElementById("markers");
var notice = document.getElementById("notice");
var close = document.getElementById("close");
var txt = document.getElementById("txt");
var hl = document.getElementById("hl");
var switch_n = document.getElementById("switch_n");
var f_ = document.getElementById("f_");
var v_ = document.getElementById("v_");
var rx_ = document.getElementById("rx_");
var ry_ = document.getElementById("ry_");
var sampleRate = document.getElementById("sampleRate");
var keys = document.getElementById("keys");
var tuners = document.getElementById("tuners");
var csv = document.getElementById("csv");
var openCsv = document.getElementById("openCsv");
var notes = ["c", "c#", "d", "d#", "e", "f", "f#", "g", "g#", "a", "a#", "b", "c"];
var letters = ('a a_ b c c_ d d_ e f f_ g g_').split(' ');
for (var i=0; i<12; i++) {
document.getElementsByTagName("style")[0].innerText += "." + letters[i] + " {color:hsl(" + (30*i) + ",100%,67%);} ";
}
var tuning_csv = new Array(25);
var t = getCookie("tuning");
if (t != "") {
console.log(t);
t = t.split(" ");
}
for (var i=0; i<25; i++) {
if (t == "") {
tuning_csv[i] = [i, Math.pow(2,i/12), 1];
} else {
tuning_csv[i] = t[i].split(",");
}
keys.innerHTML += "<div class='key' id='"+i+"' style='background-position:0 "+(-i*64)+"px;' " +
"onmousemove='pitchShift(this.id, event.pageY-this.offsetTop, event.pageX-this.offsetLeft, 16, 16);' " +
"ontouchmove='pitchShift(this.id, event.changedTouches[0].pageY-this.offsetTop, event.changedTouches[0].pageX-this.offsetLeft, event.changedTouches[0].radiusX, event.changedTouches[0].radiusY);' " +
"onmousedown='playNote(this.id, event.pageY-this.offsetTop, event.pageX-this.offsetLeft, 16, 16);' " +
"ontouchstart='playNote(this.id, event.changedTouches[0].pageY-this.offsetTop, event.changedTouches[0].pageX-this.offsetLeft, event.changedTouches[0].radiusX, event.changedTouches[0].radiusY);' " +
"ontouchend='stopNote(this.id);' ontouchcancel='stopNote(this.id);' onmouseup='stopNote(this.id);' onmouseleave='stopNote(this.id);'></div>";
tuners.innerHTML += "<div class='tuner'><select class='note' title='"+i+"' onchange='detuneNote(this.title, this.value);'></select><br/><input type='number' class='n' title='"+i+"' min='1' max='32' step='1' value='"+tuning_csv[i][1]+"' onchange='detune(this.title);' onclick='this.value=parseInt(this.value);'/>/<input type='number' class='d' title='"+i+"' min='1' max='32' step='1' value='"+tuning_csv[i][2]+"' onchange='detune(this.title);' onclick='this.value=parseInt(this.value);'/></div>";
for (var j=0; j<49; j++) {
var o = parseInt(j/12);
var note = notes[j-12*o];
if (o<2) {
note = note.toUpperCase();
}
var q = " ";
if (o<1) {
q = ".";
} else if (o>2) {
q = "`";
}
document.getElementsByClassName("note")[i].innerHTML += "<option value='"+j+"'>"+q+note+"</option>";
}
}
var ac, masterGain, wave;
var harmonics = new Array(2);
harmonics[0] = new Array(64);
harmonics[1] = new Array(64);
var w = 0;
var note_n = 0;
var chunks = [];
var frame = 0;
var real = new Array(2048);
var imag = new Array(2048);
var gain = new Array(25);
var osc = new Array(25);
var gains = new Array(25);
for (var i=0; i<25; i++) {
osc[i] = new Array(2);
gains[i] = new Array(2);
}
var iv = new Array(25);
var tuning = new Array(25);
for (var i=0; i<25; i++) {
tuning[i] = Math.pow(2, i/12);
document.getElementsByClassName("note")[i].selectedIndex = tuning_csv[i][0];
}
var kd = new Array(25);
kd.fill(false);
var l = false;
var mediaRecorder = null;
var recording = false;
var baseFreq = 110;
var amp = 1.0;
function init(r) {
if (!ac) {
if (navigator.platform.indexOf("Mac")>-1 || navigator.platform.indexOf("iPad")>-1 || navigator.platform.indexOf("iPod")>-1 || navigator.platform.indexOf("iPhone")>-1) {
ac = new (window.AudioContext || window.webkitAudioContext || window.mozAudioContext)({sampleRate: r});
} else {
ac = new (window.AudioContext || window.webkitAudioContext || window.mozAudioContext)({latencyHint:"interactive",sampleRate: r});
}
document.getElementById("play").innerText = "task_alt";
var visualizer = new App.FrequencyVisualizer(ac, canvas);
var dest = ac.createMediaStreamDestination();
mediaRecorder = new MediaRecorder(dest.stream);
mediaRecorder.ondataavailable = function(evt) {
// push each chunk (blobs) in an array
chunks.push(evt.data);
};
mediaRecorder.onstop = function(evt) {
// Make blob out of our blobs, and open it.
var blob = new Blob(chunks, { 'type' : 'audio/wav' });
document.querySelector("audio").src = URL.createObjectURL(blob);
chunks = [];
};
masterGain = ac.createGain();
masterGain.gain.value = 1.0;
masterGain.connect(ac.destination);
masterGain.connect(dest);
visualizer.acceptConnection(masterGain);
for (var j=0; j<25; j++) {
gain[j] = ac.createGain();
gain[j].gain.value = 0.0;
gain[j].connect(masterGain);
for (var i=0; i<2; i++) {
osc[j][i] = ac.createOscillator();
osc[j][i].frequency.value = baseFreq*tuning[j];
gains[j][i] = ac.createGain();
gains[j][i].gain.value = 0.0;
osc[j][i].connect(gains[j][i]);
gains[j][i].connect(gain[j]);
osc[j][i].start();
}
}
}
}
function switchNote(n) {
var imgData = ctx.getImageData(0, 0, chart.width, chart.height);
for (var y = 0; y < chart.height; y++) {
for (var x = 0; x < chart.width; x++) {
var i = (y*chart.width+x)*4;
imgData.data[i] = 0;
imgData.data[i+1] = 0;
imgData.data[i+2] = 0;
imgData.data[i+3] = Math.abs(out(x, y+n*chart.height, baseFreq*12, 1.0, 16, 16)) * 255;
}
}
ctx.putImageData(imgData, 0, 0);
}
function highlight() {
hl.value = txt.value.replace(/(\w+\.|[^\s\w]+)/g, function(x){ return x.replace(/./gi, " "); });
}
function newEq() {
out = new Function('x', 'y', 'f', 'v', 'rx', 'ry', 'return '+txt.value+';');
}
function parse() {
var imgData = ctx.getImageData(0, 0, chart.width, chart.height);
for (var y = 0; y < chart.height; y++) {
harmonics[w][y] = new Array(2048);
for (var x = 0; x < chart.width; x++) {
harmonics[w][y][x] = out(x, y+note_n*chart.height, baseFreq*12, 1.0, 16, 16);
var i = (y*chart.width+x)*4;
imgData.data[i] = 0;
imgData.data[i+1] = 0;
imgData.data[i+2] = 0;
imgData.data[i+3] = Math.abs(harmonics[w][y][x]) * 255;
}
}
ctx.putImageData(imgData, 0, 0);
frame = 0;
}
function crossfade(f, v, rx, ry, n, id) {
real[0] = 0;
imag[0] = 0;
for (var j=1; j<2048; j++) {
real[j] = harmonics[w][frame][j-1];
imag[j] = 0.0;
}
wave = ac.createPeriodicWave(real, imag, {disableNormalization: false}); //The default is false
osc[id][n].setPeriodicWave(wave);
gains[id][n].gain.linearRampToValueAtTime(1.0, ac.currentTime + 0.016);
gains[id][1-n].gain.linearRampToValueAtTime(0.0, ac.currentTime + 0.016);
frame++;
if (frame == harmonics[w].length) { frame = 0; }
}
function playNote(key, p, v, rx, ry) {
if (gain[key]) {
kd[key] = true;
pitchShift(key, p, v, rx, ry);
iv[key] = setInterval(function (p) {
if (gains[key][0].gain.value == 0.0) {
crossfade(p * tuning[key], v, rx, ry, 0, key);
} else if (gains[key][1].gain.value == 0.0) {
crossfade(p * tuning[key], v, rx, ry, 1, key);
}
}, 16);
w = 1-w;
note_n++;
parse();
}
}
function stopNote(key) {
if (gain[key]) {
kd[key] = false;
gain[key].gain.linearRampToValueAtTime(0.0, ac.currentTime + 0.001);
clearInterval(iv[key]);
}
}
function pitchShift(key, f, v, rx, ry) {
if (ac) {
if (l === true) {
f = baseFreq*2048/(2048-f) * 12;
} else {
f = baseFreq*Math.pow(2,f/64/12) * 12;
}
osc[key][0].frequency.value = f * tuning[key];
osc[key][1].frequency.value = f * tuning[key];
v = volume(key, v);
f_.innerText = parseInt(f * tuning[key]);
v_.innerText = v.toFixed(2);
rx_.innerText = rx.toFixed(2);
ry_.innerText = ry.toFixed(2);
}
}
function volume(key, v) {
v = -Math.cos(v*Math.PI*2/64)/2+0.5;
if (gain[key] && kd[key] === true) {
gain[key].gain.linearRampToValueAtTime(v, ac.currentTime + 0.001);
}
return v;
}
function setAmp(event) {
event.preventDefault();
amp += event.deltaY * -0.001;
// Restrict scale
amp = Math.min(Math.max(0.0039, amp), 1);
if (masterGain) {
masterGain.gain.linearRampToValueAtTime(amp, ac.currentTime + 0.001);
}
//console.log(amp);
}
function scale() {
if (l === true) {
var scale = [];
var frets = [];
for (var i=0; i<=25; i++) {
scale[i] = 1536-Math.pow(2, i/12)*64*8+64*8;
frets[i] = scale[i]/1536*100;
//document.getElementById("keys").innerHTML += "<hr style='margin:0;width:64px;background-color:white;position:absolute;left:0px;top:"+scale[i]+"px;'/>";
}
var lg = [];
var colors = ["transparent", "rgba(0,0,0,0.5)", "transparent", "rgba(0,0,0,0.5)", "transparent", "rgba(0,0,0,0.5)", "transparent", "transparent", "rgba(0,0,0,0.5)", "transparent", "rgba(0,0,0,0.5)", "transparent"];
for (var k=0; k<25; k++) {
lg[k] = "linear-gradient(90deg, transparent 0%, transparent 49%, white 50%, transparent 51%, transparent 100%), linear-gradient(180deg, ";
for (var i=23; i>=0; i--) {
var j = i-k;
while (j>=12) {j-=12;}
while (j<0) {j+=12;}
lg[k] += colors[j]+" "+frets[i+1]+"%, "+colors[j]+" "+frets[i]+"%, "
}
lg[k] = lg[k].slice(0,-2)+")";
document.getElementById(k).style.backgroundImage = lg[k];
document.getElementById(k).style.backgroundPosition = "0 0";
}
document.getElementById("scale").innerText = "reorder";
ruler_v.style.display = "none";
} else {
for (var k=0; k<25; k++) {
document.getElementById(k).style.backgroundImage = "linear-gradient(90deg, transparent 0%, transparent 49%, white 50%, transparent 51%, transparent 100%), repeating-linear-gradient(0deg, transparent 0%, transparent 4.17%, rgba(0,0,0,0.5) 4.17%, rgba(0,0,0,0.5) 8.33%, transparent 8.33%, transparent 12.50%, rgba(0,0,0,0.5) 12.50%, rgba(0,0,0,0.5) 16.67%, transparent 16.67%, transparent 20.83%, rgba(0,0,0,0.5) 20.83%, rgba(0,0,0,0.5) 25.00%, transparent 25.00%, transparent 29.17%, transparent 29.17%, transparent 33.33%, rgba(0,0,0,0.5) 33.33%, rgba(0,0,0,0.5) 37.50%, transparent 37.50%, transparent 41.67%, rgba(0,0,0,0.5) 41.67%, rgba(0,0,0,0.5) 45.83%, transparent 45.83%, transparent 50%)";
document.getElementById(k).style.backgroundPosition = "0 "+(-k*64)+"px";
}
document.getElementById("scale").innerText = "line_weight";
ruler_v.style.display = "block";
}
}
function record() {
if (!recording) {
mediaRecorder.start();
recording = true;
document.getElementById("rec").innerText = "stop";
} else {
mediaRecorder.requestData();
mediaRecorder.stop();
recording = false;
document.getElementById("rec").innerText = "fiber_manual_record";
}
}
function detune(key) {
document.getElementsByClassName("note")[key].selectedIndex = -1;
var n_ = document.getElementsByClassName("n")[key];
var d_ = document.getElementsByClassName("d")[key];
var n = parseInt(n_.value);
var d = parseInt(d_.value);
if (!n || !d || n<=0 || d<=0) {
n = Math.pow(2, key/12);
d = 1;
n_.value = n;
d_.value = d;
}
console.log(n+" / "+d+" = "+n/d);
tuning[key] = n/d;
tuning_csv[key] = [-1, n_.value, d_.value];
setCookie("tuning", tuning_csv, 365);
}
function detuneNote(key, v) {
var n_ = document.getElementsByClassName("n")[key];
var d_ = document.getElementsByClassName("d")[key];
tuning[key] = Math.pow(2, v/12);
n_.value = tuning[key];
d_.value = 1;
tuning_csv[key] = [v, n_.value, d_.value];
setCookie("tuning", tuning_csv, 365);
}
function showTuning() {
if (tuners.style.display != 'block') {
tuners.style.display = 'block';
document.getElementById("tune").innerText = "format_list_numbered";
} else {
tuners.style.display = 'none';
document.getElementById("tune").innerText = "tune";
}
}
function saveTuning() {
var filename = "fretboard_tuning.csv";
csv.setAttribute('href', 'data:text/csv;charset=utf-8,' + encodeURIComponent(tuning_csv.join("\n")));
csv.setAttribute('download', filename);
csv.click();
}
function openTuning() {
if (!openCsv.files[0]) {
openCsv.click();
} else {
var file = openCsv.files[0];
var reader = new FileReader();
reader.addEventListener("load", function () {
var a = reader.result.split("\n");
for (var i=0; i<a.length; i++) {
a[i] = a[i].split(",");
console.log(a[i][0] + " " + a[i][1] + " " + a[i][2]);
tuning[i] = a[i][1] / a[i][2];
document.getElementsByClassName("note")[i].selectedIndex = a[i][0];
document.getElementsByClassName("n")[i].value = a[i][1];
document.getElementsByClassName("d")[i].value = a[i][2];
tuning_csv[i] = [a[i][0], a[i][1], a[i][2]];
setCookie("tuning", tuning_csv, 365);
}
ac = null;
init(sampleRate.value);
openCsv.value = null;
}, false);
if (file && file.name.slice(-4) == ".csv") {
reader.readAsText(file);
}
}
}
function setCookie(cname,cvalue,exdays) {
t = "";
for (var i=0; i<cvalue.length; i++) {
t += cvalue[i].join(",") + " ";
}
var cvalue = t;
const d = new Date();
d.setTime(d.getTime() + (exdays*24*60*60*1000));
let expires = "expires=" + d.toUTCString();
document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/";
}
function getCookie(cname) {
let name = cname + "=";
let decodedCookie = decodeURIComponent(document.cookie);
let ca = decodedCookie.split(';');
for(let i = 0; i < ca.length; i++) {
let c = ca[i];
while (c.charAt(0) == ' ') {
c = c.substring(1);
}
if (c.indexOf(name) == 0) {
return c.substring(name.length, c.length);
}
}
return "";
}
function showPopup() {
if (notice.style.right=='-264px') {
notice.style.right='0px';
close.getElementsByTagName('i')[0].innerText = 'keyboard_double_arrow_right';
} else {
notice.style.right='-264px';
close.getElementsByTagName('i')[0].innerText = 'keyboard_double_arrow_left';
}
}
function addMarkers() {
var offset = 28;
for (var j=0; j<2; j++) {
if (j == 1) { offset = 796; }
for (var i=0; i<12; i++) {
var m = i+3;
if (m >= 12) { m -= 12; }
markers.innerHTML += "<span class='"+letters[m]+"' style='left:"+(offset+64*i)+"px;'>" + letters[m].replace("_", "#") + "</span>";
}
}
markers.innerHTML += "<span class='"+letters[3]+"' style='left:1564px;'>" + letters[3].replace("_", "#") + "</span><span style='left:1600px;'>`</span>";
}
var off = 1;
var oct = 768;
var ruler_v = document.getElementById("ruler_v");
var ruler_h = document.getElementById("ruler_h");
function scrollRulers(event) {
var x = event.pageX;
var y = event.pageY;
ruler_v.scrollTo(0,Math.log2(off)*oct+oct-y+80);
ruler_h.scrollTo(Math.log2(off)*oct+oct-x+32,0);
}
function countIntervals() {
for (var i=1; i<17; i++) {
var top = Math.log2(i)*oct+oct;
var left = Math.log2(i)*oct+oct;
ruler_v.innerHTML += "<hr style='top:"+top+"px;'/>";
ruler_h.innerHTML += "<hr style='left:"+left+"px;'/>";
}
}
countIntervals();
document.body.addEventListener('mousemove', scrollRulers);
</script>
</body>
</html>