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utils.js
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// generates an array where indices correspond to midi notes
const everyNote = 'C,C#,D,D#,E,F,F#,G,G#,A,A#,B,'.repeat(20).split(',').map(function (x, i) {
return x + '' + Math.floor(i / 12);
});
//returns the midi pitch value for the given note.
//returns -1 if not found
function toMidi(note) {
return everyNote.indexOf(note);
}
export const presetMelodies = {
'Twinkle': {
notes: [
{ pitch: 60, quantizedStartStep: 0, quantizedEndStep: 2 },
{ pitch: 60, quantizedStartStep: 2, quantizedEndStep: 4 },
{ pitch: 67, quantizedStartStep: 4, quantizedEndStep: 6 },
{ pitch: 67, quantizedStartStep: 6, quantizedEndStep: 8 },
{ pitch: 69, quantizedStartStep: 8, quantizedEndStep: 10 },
{ pitch: 69, quantizedStartStep: 10, quantizedEndStep: 12 },
{ pitch: 67, quantizedStartStep: 12, quantizedEndStep: 16 },
{ pitch: 65, quantizedStartStep: 16, quantizedEndStep: 18 },
{ pitch: 65, quantizedStartStep: 18, quantizedEndStep: 20 },
{ pitch: 64, quantizedStartStep: 20, quantizedEndStep: 22 },
{ pitch: 64, quantizedStartStep: 22, quantizedEndStep: 24 },
{ pitch: 62, quantizedStartStep: 24, quantizedEndStep: 26 },
{ pitch: 62, quantizedStartStep: 26, quantizedEndStep: 28 },
{ pitch: 60, quantizedStartStep: 28, quantizedEndStep: 32 },
],
quantizationInfo: { stepsPerQuarter: 4 },
tempos: [{ time: 0, qpm: 120 }],
totalQuantizedSteps: 32,
},
'Sparse': {
notes: [
{ pitch: 64, quantizedStartStep: 0, quantizedEndStep: 1 },
{ pitch: 62, quantizedStartStep: 1, quantizedEndStep: 2 },
{ pitch: 64, quantizedStartStep: 2, quantizedEndStep: 3 },
{ pitch: 65, quantizedStartStep: 3, quantizedEndStep: 4 },
{ pitch: 67, quantizedStartStep: 4, quantizedEndStep: 8 },
{ pitch: 60, quantizedStartStep: 16, quantizedEndStep: 17 },
{ pitch: 59, quantizedStartStep: 17, quantizedEndStep: 18 },
{ pitch: 60, quantizedStartStep: 18, quantizedEndStep: 19 },
{ pitch: 62, quantizedStartStep: 19, quantizedEndStep: 20 },
{ pitch: 64, quantizedStartStep: 20, quantizedEndStep: 24 }
],
quantizationInfo: { stepsPerQuarter: 4 },
tempos: [{ time: 0, qpm: 120 }],
totalQuantizedSteps: 32,
},
'Arpeggiated': {
notes: [
{ pitch: 48, quantizedStartStep: 0, quantizedEndStep: 2 },
{ pitch: 52, quantizedStartStep: 2, quantizedEndStep: 4 },
{ pitch: 55, quantizedStartStep: 4, quantizedEndStep: 6 },
{ pitch: 60, quantizedStartStep: 6, quantizedEndStep: 8 },
{ pitch: 64, quantizedStartStep: 8, quantizedEndStep: 10 },
{ pitch: 67, quantizedStartStep: 10, quantizedEndStep: 12 },
{ pitch: 64, quantizedStartStep: 12, quantizedEndStep: 14 },
{ pitch: 60, quantizedStartStep: 14, quantizedEndStep: 16 },
{ pitch: 57, quantizedStartStep: 16, quantizedEndStep: 18 },
{ pitch: 60, quantizedStartStep: 18, quantizedEndStep: 20 },
{ pitch: 64, quantizedStartStep: 20, quantizedEndStep: 22 },
{ pitch: 69, quantizedStartStep: 22, quantizedEndStep: 24 },
{ pitch: 72, quantizedStartStep: 24, quantizedEndStep: 26 },
{ pitch: 76, quantizedStartStep: 26, quantizedEndStep: 28 },
{ pitch: 72, quantizedStartStep: 28, quantizedEndStep: 30 },
{ pitch: 69, quantizedStartStep: 30, quantizedEndStep: 32 }
],
quantizationInfo: { stepsPerQuarter: 4 },
tempos: [{ time: 0, qpm: 120 }],
totalQuantizedSteps: 32,
},
'Dense': {
notes: [
{ pitch: 72, quantizedStartStep: 0, quantizedEndStep: 1 },
{ pitch: 75, quantizedStartStep: 1, quantizedEndStep: 2 },
{ pitch: 80, quantizedStartStep: 2, quantizedEndStep: 3 },
{ pitch: 75, quantizedStartStep: 3, quantizedEndStep: 4 },
{ pitch: 84, quantizedStartStep: 4, quantizedEndStep: 5 },
{ pitch: 80, quantizedStartStep: 5, quantizedEndStep: 6 },
{ pitch: 75, quantizedStartStep: 6, quantizedEndStep: 7 },
{ pitch: 72, quantizedStartStep: 7, quantizedEndStep: 8 },
{ pitch: 74, quantizedStartStep: 8, quantizedEndStep: 9 },
{ pitch: 77, quantizedStartStep: 9, quantizedEndStep: 10 },
{ pitch: 82, quantizedStartStep: 10, quantizedEndStep: 11 },
{ pitch: 77, quantizedStartStep: 11, quantizedEndStep: 12 },
{ pitch: 86, quantizedStartStep: 12, quantizedEndStep: 13 },
{ pitch: 82, quantizedStartStep: 13, quantizedEndStep: 14 },
{ pitch: 77, quantizedStartStep: 14, quantizedEndStep: 15 },
{ pitch: 74, quantizedStartStep: 15, quantizedEndStep: 16 },
{ pitch: 75, quantizedStartStep: 16, quantizedEndStep: 17 },
{ pitch: 79, quantizedStartStep: 17, quantizedEndStep: 18 },
{ pitch: 84, quantizedStartStep: 18, quantizedEndStep: 19 },
{ pitch: 79, quantizedStartStep: 19, quantizedEndStep: 20 },
{ pitch: 87, quantizedStartStep: 20, quantizedEndStep: 21 },
{ pitch: 84, quantizedStartStep: 21, quantizedEndStep: 22 },
{ pitch: 79, quantizedStartStep: 22, quantizedEndStep: 23 },
{ pitch: 75, quantizedStartStep: 23, quantizedEndStep: 24 },
{ pitch: 75, quantizedStartStep: 24, quantizedEndStep: 25 },
{ pitch: 79, quantizedStartStep: 25, quantizedEndStep: 26 },
{ pitch: 84, quantizedStartStep: 26, quantizedEndStep: 27 },
{ pitch: 84, quantizedStartStep: 27, quantizedEndStep: 28 },
{ pitch: 87, quantizedStartStep: 28, quantizedEndStep: 29 },
{ pitch: 91, quantizedStartStep: 29, quantizedEndStep: 30 },
{ pitch: 84, quantizedStartStep: 30, quantizedEndStep: 31 },
{ pitch: 91, quantizedStartStep: 31, quantizedEndStep: 32 }
],
quantizationInfo: { stepsPerQuarter: 4 },
tempos: [{ time: 0, qpm: 120 }],
totalQuantizedSteps: 32,
},
'Bounce': {
notes: [
{ pitch: 64, quantizedStartStep: 0, quantizedEndStep: 2 },
{ pitch: 60, quantizedStartStep: 2, quantizedEndStep: 4 },
{ pitch: 64, quantizedStartStep: 4, quantizedEndStep: 6 },
{ pitch: 60, quantizedStartStep: 6, quantizedEndStep: 8 },
{ pitch: 65, quantizedStartStep: 8, quantizedEndStep: 10 },
{ pitch: 60, quantizedStartStep: 10, quantizedEndStep: 12 },
{ pitch: 65, quantizedStartStep: 12, quantizedEndStep: 14 },
{ pitch: 60, quantizedStartStep: 14, quantizedEndStep: 16 },
{ pitch: 67, quantizedStartStep: 16, quantizedEndStep: 18 },
{ pitch: 60, quantizedStartStep: 18, quantizedEndStep: 20 },
{ pitch: 67, quantizedStartStep: 20, quantizedEndStep: 22 },
{ pitch: 60, quantizedStartStep: 22, quantizedEndStep: 24 },
{ pitch: 62, quantizedStartStep: 24, quantizedEndStep: 26 },
{ pitch: 59, quantizedStartStep: 26, quantizedEndStep: 28 },
{ pitch: 62, quantizedStartStep: 28, quantizedEndStep: 30 },
{ pitch: 59, quantizedStartStep: 30, quantizedEndStep: 32 }
],
quantizationInfo: { stepsPerQuarter: 4 },
tempos: [{ time: 0, qpm: 120 }],
totalQuantizedSteps: 32,
},
'Melody 1': {
notes: [
{ pitch: toMidi('A3'), quantizedStartStep: 0, quantizedEndStep: 4 },
{ pitch: toMidi('D4'), quantizedStartStep: 4, quantizedEndStep: 6 },
{ pitch: toMidi('E4'), quantizedStartStep: 6, quantizedEndStep: 8 },
{ pitch: toMidi('F4'), quantizedStartStep: 8, quantizedEndStep: 10 },
{ pitch: toMidi('D4'), quantizedStartStep: 10, quantizedEndStep: 12 },
{ pitch: toMidi('E4'), quantizedStartStep: 12, quantizedEndStep: 16 },
{ pitch: toMidi('C4'), quantizedStartStep: 16, quantizedEndStep: 20 },
{ pitch: toMidi('D4'), quantizedStartStep: 20, quantizedEndStep: 26 },
{ pitch: toMidi('A3'), quantizedStartStep: 26, quantizedEndStep: 28 },
{ pitch: toMidi('A3'), quantizedStartStep: 28, quantizedEndStep: 32 }
],
quantizationInfo: { stepsPerQuarter: 4 },
tempos: [{ time: 0, qpm: 120 }],
totalQuantizedSteps: 32,
},
'Melody 2': {
notes: [
{ pitch: 50, quantizedStartStep: 0, quantizedEndStep: 1 },
{ pitch: 53, quantizedStartStep: 1, quantizedEndStep: 2 },
{ pitch: 58, quantizedStartStep: 2, quantizedEndStep: 3 },
{ pitch: 58, quantizedStartStep: 3, quantizedEndStep: 4 },
{ pitch: 58, quantizedStartStep: 4, quantizedEndStep: 5 },
{ pitch: 53, quantizedStartStep: 5, quantizedEndStep: 6 },
{ pitch: 53, quantizedStartStep: 6, quantizedEndStep: 7 },
{ pitch: 53, quantizedStartStep: 7, quantizedEndStep: 8 },
{ pitch: 52, quantizedStartStep: 8, quantizedEndStep: 9 },
{ pitch: 55, quantizedStartStep: 9, quantizedEndStep: 10 },
{ pitch: 60, quantizedStartStep: 10, quantizedEndStep: 11 },
{ pitch: 60, quantizedStartStep: 11, quantizedEndStep: 12 },
{ pitch: 60, quantizedStartStep: 12, quantizedEndStep: 13 },
{ pitch: 60, quantizedStartStep: 13, quantizedEndStep: 14 },
{ pitch: 60, quantizedStartStep: 14, quantizedEndStep: 15 },
{ pitch: 52, quantizedStartStep: 15, quantizedEndStep: 16 },
{ pitch: 57, quantizedStartStep: 16, quantizedEndStep: 17 },
{ pitch: 57, quantizedStartStep: 17, quantizedEndStep: 18 },
{ pitch: 57, quantizedStartStep: 18, quantizedEndStep: 19 },
{ pitch: 65, quantizedStartStep: 19, quantizedEndStep: 20 },
{ pitch: 65, quantizedStartStep: 20, quantizedEndStep: 21 },
{ pitch: 65, quantizedStartStep: 21, quantizedEndStep: 22 },
{ pitch: 57, quantizedStartStep: 22, quantizedEndStep: 23 },
{ pitch: 57, quantizedStartStep: 23, quantizedEndStep: 24 },
{ pitch: 57, quantizedStartStep: 24, quantizedEndStep: 25 },
{ pitch: 57, quantizedStartStep: 25, quantizedEndStep: 26 },
{ pitch: 62, quantizedStartStep: 26, quantizedEndStep: 27 },
{ pitch: 62, quantizedStartStep: 27, quantizedEndStep: 28 },
{ pitch: 65, quantizedStartStep: 28, quantizedEndStep: 29 },
{ pitch: 65, quantizedStartStep: 29, quantizedEndStep: 30 },
{ pitch: 69, quantizedStartStep: 30, quantizedEndStep: 31 },
{ pitch: 69, quantizedStartStep: 31, quantizedEndStep: 32 }
],
quantizationInfo: { stepsPerQuarter: 4 },
tempos: [{ time: 0, qpm: 120 }],
totalQuantizedSteps: 32,
},
}