【HTML5】マリオのコインの音をブラウザで出そう【ファミコン】 - Qiitaconst AudioContext = window.AudioContext || window.webkitAudioContext const audioContext = new AudioContext() const gainNode = audioContext.createGain() gainNode.connect(audioContext.destination) gainNode.gain.value = 0.1 const oscillator = audioContext.createOscillator() oscillator.connect(gainNode) oscillator.type = "square" oscillator.frequency.setValueAtTime(987.766, audioContext.currentTime)/
