Lab QE 22/02/2022 บิว-ณัชพล

✨ NATCHAPHON TANGSATIDPORN

<button onclick="Begin()">
  Start
</button>
<button onclick="gain.gain.value = 0">
  Stop
</button>
<input type="range" min="0" max="1000" value="400" oninput="changeF(this.value)">
<input type="range" min="0" max="100" value="40" oninput="changeV(this.value)">
<script>
  let Start = 0;
  audio = new (window.AudioContext || window.webkitAudioContext)()
  osci = audio.createOscillator()
  gain = audio.createGain()
  osci.connect(gain)
  gain.connect(audio.destination) //เชื่อม
 
  function Begin(){
    if (Start == 0){
      osci.start()
      Start = 1;
    }else{
      gain.gain.value = 1;
    }
  }
  
  function changeF(val){
    val = parseInt(val)
    console.log(val)
    osci.frequency.value = val;
  }
  
    function changeV(val){
    val = parseInt(val)
    val = val/100
    console.log(val)
    gain.gain.value = val;
  }
  
  function sound(val){
    let sound_osci = audio.createOscillator()
    let sound_gain = audio.createGain()
    sound_osci.connect(sound_gain)
    sound_gain.connect(audio.destiation)
  }
  // osci.start()  
  // osci.frequency.setValueAtTime(260,audio.currentTime)
  // osci.frequency.value //ได้ผลเหมือยข้างบน โดยจะเปลี่ยนทันที
  // osci.type='sine'
  // osci.disconnect(audio.destination)
  // gain.gain.value = 0
</script>