Created
January 3, 2019 16:00
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| // instantiate audio context | |
| let audioCtx = new (window.AudioContext || window.webkitAudioContext)() | |
| // create gain node (volume) | |
| let gainNode = audioCtx.createGain() | |
| // create oscillator | |
| let oscillator = audioCtx.createOscillator() | |
| // connect audio nodes | |
| oscillator.connect(gainNode) | |
| gainNode.connect(audioCtx.destination) | |
| // set frequency | |
| oscillator.frequency.setValueAtTime(440, audioCtx.currentTime) | |
| // set volume | |
| gainNode.gain.setValueAtTime(0.5, audioCtx.currentTime) | |
| oscillator.start() |
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