Created
December 31, 2023 23:58
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Web Audio Synthesis Starter (two osciallators)
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| <html> | |
| <!-- | |
| A Simple example using sliders to control the frequencies of two oscillators | |
| --> | |
| <body> | |
| <div> | |
| <label for="frequency1">Frequency 1: </label> | |
| <input type="range" id="frequency1" min="0" max="4000" value="600"> | |
| <span id="frequency1Value">600</span> Hz | |
| </div> | |
| <div> | |
| <label for="frequency2">Frequency 2: </label> | |
| <input type="range" id="frequency2" min="0" max="4000" value="1040"> | |
| <span id="frequency2Value">1040</span> Hz | |
| </div> | |
| <button id="startAudio">Play Sound</button> | |
| <textarea id="soundLog" rows="10" cols="50"></textarea> | |
| <script> | |
| // Global audio context | |
| var audioContext; | |
| var oscillator1, oscillator2; | |
| var gainNode; | |
| // Function to initialize audio components | |
| function initializeAudio() { | |
| audioContext = new (window.AudioContext || window.webkitAudioContext)(); | |
| oscillator1 = audioContext.createOscillator(); | |
| oscillator2 = audioContext.createOscillator(); | |
| gainNode = audioContext.createGain(); | |
| oscillator1.connect(gainNode); | |
| oscillator2.connect(gainNode); | |
| gainNode.connect(audioContext.destination); | |
| oscillator1.start(); | |
| oscillator2.start(); | |
| } | |
| // Function to update oscillator frequency | |
| function updateOscillatorFrequency(oscillator, frequency) { | |
| // Log the frequency and oscillator to the the soundLog textarea | |
| var soundLog = document.getElementById('soundLog'); | |
| soundLog.value += 'Frequency: ' + frequency + ' Hz\n'; | |
| soundLog.value += 'Oscillator: ' + oscillator + '\n\n'; | |
| // Scroll to the bottom of the textarea | |
| soundLog.scrollTop = soundLog.scrollHeight; | |
| oscillator.frequency.setValueAtTime(frequency, audioContext.currentTime); | |
| } | |
| // Function to handle slider input | |
| function handleSliderInput(sliderId, valueId, oscillator) { | |
| var slider = document.getElementById(sliderId); | |
| var display = document.getElementById(valueId); | |
| slider.oninput = function() { | |
| var frequency = this.value; | |
| display.textContent = frequency; | |
| updateOscillatorFrequency(oscillator, frequency); | |
| }; | |
| } | |
| // Start button event listener | |
| document.getElementById('startAudio').addEventListener('click', function() { | |
| initializeAudio(); | |
| handleSliderInput('frequency1', 'frequency1Value', oscillator1); | |
| handleSliderInput('frequency2', 'frequency2Value', oscillator2); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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