import convertMidiNoteToFrequency from '/src/convertMidiNoteToFrequency'
const audioContext = new AudioContext()
const destination = audioContext.destination
const MidiNoteArray = [60, 64, 67, 71]
const oscArray = MidiNoteArray.map(frequency => {
const osc = audioContext.createOscillator()
osc.frequency.value = convertMidiNoteToFrequency(frequency)
const gain = audioContext.createGain()
// 1が default の値なので、それより下げる
// osc -> gain -> destination
gain.connect(destination)
const now = audioContext.currentTime
oscArray.forEach((osc, index) => {
oscArray.forEach(osc => osc.stop())