Created
January 24, 2024 15:09
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Safari web audio glitch test
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| <!DOCTYPE html> | |
| <html> | |
| <body> | |
| <button id="startButton" onclick="startAudio()">Start</button> | |
| <script> | |
| let context = new (window.AudioContext || window.webkitAudioContext)(); | |
| let oscillator = context.createOscillator(); | |
| let panner = context.createPanner(); | |
| oscillator.type = 'sine'; | |
| oscillator.frequency.value = 440; | |
| oscillator.connect(panner); | |
| panner.connect(context.destination); | |
| // copied from Inviso default cone parameters | |
| panner.coneInnerAngle = 24.22774531795417; | |
| panner.coneOuterAngle = 72.6832359538625; | |
| panner.coneOuterGain = 0.05; | |
| let angle = 0; | |
| let intervalId; | |
| function startAudio() { | |
| if (intervalId) { | |
| return; | |
| } | |
| oscillator.start(); | |
| // set the position of the sound source | |
| if (panner.positionX) { | |
| panner.positionX.value = 0; | |
| panner.positionY.value = 0; | |
| panner.positionZ.value = 1; | |
| } else { | |
| panner.setPosition(0, 0, 1); | |
| } | |
| intervalId = setInterval(() => { | |
| angle = (angle + 1) % 360; | |
| let radian = angle * Math.PI / 180; | |
| // there are certain combinations of x and z that when you move through, | |
| // the sound will glitch in safari. for example: | |
| // let x = 0.3416666666666667; | |
| // let z = -0.5446390350150271; | |
| // whereas these cycle through areas that are fine and areas that are not. | |
| let x = angle / 360; | |
| let z = Math.cos(radian); | |
| if (panner.orientationX) { | |
| panner.orientationX.value = x; | |
| panner.orientationY.value = 0; | |
| panner.orientationZ.value = z; | |
| } else { | |
| panner.setOrientation(x, 0, z); | |
| } | |
| }, 20); | |
| // 60fps | |
| } | |
| </script> | |
| </body> | |
| </html> |
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