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main_js.js
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///let midi = null; // global MIDIAccess object
navigator.requestMIDIAccess().then(onMIDISuccess, onMIDIFailure);
function onMIDISuccess(midiAccess) {
console.log("MIDI ready!");
for (var input of midiAccess.inputs.values())
input.onmidimessage = getMIDIMessage;
}
function onMIDIFailure(msg) {
console.error(`Failed to get MIDI access - ${msg}`);
}
var NowChord = [];
var Nownote = [];
const CM = ['C', 'E', 'G'];
const Cm = ["C", "D#", "G"];
var Chord_name;
var M_or_m;
var details;
function getMIDIMessage(midiAccess) {
// console.log(midiAccess);
///console.log(octave);
switch (midiAccess.data[0]) {
case 144:
NowChord.push(midiAccess.data[1]);
NowChord.sort();
//if (NowChord[0] % 12 == 0) { Chord_name = "C"; }
//if (NowChord[0] % 12 == 1) { Chord_name = ""; }
//if (NowChord[0] % 12 == 2) { Chord_name = "D"; }
//if (NowChord[0] % 12 == 3) { Chord_name = "D#"; }
//if (NowChord[0] % 12 == 4) { Chord_name = "E"; }
//if (NowChord[0] % 12 == 5) { Chord_name = "F"; }
//if (NowChord[0] % 12 == 6) { Chord_name = "F#"; }
//if (NowChord[0] % 12 == 7) { Chord_name = "G"; }
//if (NowChord[0] % 12 == 8) { Chord_name = "G#"; }
//if (NowChord[0] % 12 == 9) { Chord_name = "A"; }
//if (NowChord[0] % 12 == 10) { Chord_name = "B♭"; }
//if (NowChord[0] % 12 == 11) { Chord_name = "B"; }
//if (NowChord[${ NowChord.length }] % 12 == 0) {Nownote[${ NowChord.length }] = "C"; }
//if (NowChord[${ NowChord.length }] % 12 == 1) { Nownote[${ NowChord.length }] = "C#"; }
//if (NowChord[${ NowChord.length }] % 12 == 2) { Nownote[${ NowChord.length }] = "D"; }
//if (NowChord[${ NowChord.length }] % 12 == 3) { Nownote[${ NowChord.length }] = "D#"; }
//if (NowChord[${ NowChord.length }] % 12 == 4) { Nownote[${ NowChord.length }]= "E"; }
//if (NowChord[${ NowChord.length }] % 12 == 5) { Nownote[${ NowChord.length }]= "F"; }
//if (NowChord[${ NowChord.length }] % 12 == 6) { Nownote[${ NowChord.length }] = "F#";
// if (NowChord[${ NowChord.length }] % 12 == 7) { Nownote[${ NowChord.length }] = "G"; }
// if (NowChord[${ NowChord.length }]d % 12 == 8) { Nownote[${ NowChord.length }] = "G#"; }
// if (NowChord[${ NowChord.length }] % 12 == 9) { Nownote[${ NowChord.length }] = "A"; }
// if (NowChord[${ NowChord.length }] % 12 == 10) { Nownote[${ NowChord.length }] = "B♭"; }
// if (NowChord[${ NowChord.length }] % 12 == 11) { Nownote[${ NowChord.length }] = "B"; }
for (let i = 0; i < NowChord.length; i++) {
if (NowChord[i] % 12 == 0) { Nownote[i] = "C"; }
if (NowChord[i] % 12 == 1) { Nownote[i] = ""; }
if (NowChord[i] % 12 == 2) { Nownote[i] = "D"; }
if (NowChord[i] % 12 == 3) { Nownote[i] = "D#"; }
if (NowChord[i] % 12 == 4) { Nownote[i] = "E"; }
if (NowChord[i] % 12 == 5) { Nownote[i] = "F"; }
if (NowChord[i] % 12 == 6) { Nownote[i] = "F#"; }
if (NowChord[i] % 12 == 7) { Nownote[i] = "G"; }
if (NowChord[i] % 12 == 8) { Nownote[i] = "G#"; }
if (NowChord[i] % 12 == 9) { Nownote[i] = "A"; }
if (NowChord[i] % 12 == 10) { Nownote[i] = "B♭"; }
if (NowChord[i] % 12 == 11) { Nownote[i] = "B"; }
}
console.log(Nownote);
if (CM.every(elem => Nownote.includes(elem)) && CM.length === Nownote.length == true) { Chord_name = "C Major"; }
else if (Cm.every(elem => Nownote.includes(elem)) == true) { Chord_name = "C minor"; }
if (NowChord.length == 3) {
//if ((NowChord[1] - 4 - NowChord[0]) % 12 == 0 && (NowChord[2] - 7 - NowChord[0]) % 12 == 0 ) {
// M_or_m = "Major";
// console.log(Chord_name, M_or_m);
// console.log(NowChord);
//} else { }
if ((NowChord[1] - 4 - NowChord[0]) % 12 == 0 && (NowChord[2] - 7 - NowChord[0]) % 12 == 0 ) {
M_or_m = "Major";
console.log(Chord_name, M_or_m);
console.log(Nownote);
} else { }
if ((NowChord[1] - 4+1 - NowChord[0]) % 12 == 0 && (NowChord[2] - 7 - NowChord[0]) % 12 == 0 ) {
M_or_m = "minor";
console.log(Chord_name, M_or_m);
console.log(NowChord);
} else { }
}
//Minors
//if (NowChord[0] % 12 == 0 && NowChord[1] == NowChord[0] + 4 - 1 && NowChord[0] + 7) {
// console.log(NowChord, NowChord.length, "C-Minor");
//}
//if (NowChord[0] % 12 == 2 && NowChord[1] == NowChord[0] + 4 - 1 && NowChord[0] + 7) {
// console.log(NowChord, NowChord.length, "D-Minor");
//}
//if (NowChord[0] % 12 == 4 && NowChord[1] == NowChord[0] + 4 - 1 && NowChord[0] + 7) {
// console.log(NowChord, NowChord.length, "E-Minor");
//}
//if (NowChord[0] % 12 == 6 && NowChord[1] == NowChord[0] + 4 - 1 && NowChord[0] + 7) {
// console.log(NowChord, NowChord.length, "F-Minor");
//}
//}
if (NowChord.length == 4) { //seventh or add6 or add4
if ((NowChord[1] - 4 - NowChord[0]) % 12 == 0 && (NowChord[2] - 7 - NowChord[0])%12 ==0 && (NowChord[3] - NowChord[0] - 11)%12==0) {
M_or_m = "maj";
details = "7";
console.log(Chord_name, M_or_m,details);
//this works
}
if ((NowChord[1] - 4 +1 - NowChord[0]) % 12 == 0 && (NowChord[2] - 7 - NowChord[0]) % 12 == 0 && (NowChord[3] - NowChord[0] - 11) % 12 == 0) {
M_or_m = "m";
details = "7"
console.log(Chord_name, M_or_m,details);
}
if ((NowChord[1] - 4 - NowChord[0]) % 12 == 0 && (NowChord[2] - 7 - NowChord[0]) % 12 == 0 && (NowChord[3] - NowChord[0] - 11+1) % 12 == 0) {
M_or_m = "";
details = "7";
console.log(Chord_name, M_or_m,details);
}
if (NowChord[1] == NowChord[0] + 4-1 && NowChord[2] == NowChord[0] + 7 && NowChord[3] == NowChord[0] + 9) {
M_or_m = "m";
details = "(add6)";
console.log(Chord_name, M_or_m, details); // un op
}
if (NowChord[1] == NowChord[0] + 4 && NowChord[2] == NowChord[0] + 7 && NowChord[3] == NowChord[0] + 9) {
M_or_m = "";
details = "(add6)";
console.log(Chord_name, M_or_m, details); /// un op
}
if ((NowChord[1] - NowChord[0] - 2) % 12 == 0 && ( NowChord[2] - NowChord[0] - 4 + 1)% 12 == 0 && (NowChord[3] - 7 - NowChord[0])%12 ==0) {
M_or_m = "m";
details = "(add2)";
console.log(Chord_name, M_or_m, details);
}
if ((NowChord[1] - NowChord[0] - 2) % 12 == 0 && (NowChord[2] - NowChord[0] - 4 ) % 12 == 0 && (NowChord[3] - 7 - NowChord[0]) % 12 == 0) {
M_or_m = "";
details = "(add2)";
console.log(Chord_name, M_or_m, details);
}
}
break;
case 128:
NowChord.splice(NowChord.indexOf(midiAccess.data[1]), 1);
Nownote.splice(Nownote.indexOf(midiAccess.data[1]),1)
break;
}
}