fist commit

2024-08-25 22:09:29 +02:00
commit 5588d6f5eb
17 changed files with 814 additions and 0 deletions
--- a/test.html
+++ b/test.html
@ -0,0 +1,50 @@
+<body>
+    <label for="duration">Duration</label>
+    <input
+    name="duration"
+    id="duration"
+    type="range"
+    min="0"
+    max="2"
+    value="1"
+    step="0.1" />
+
+    <label for="band">Band</label>
+    <input
+    name="band"
+    id="band"
+    type="range"
+    min="400"
+    max="1200"
+    value="1000"
+    step="5" />
+
+</body>
+<script>
+const audioCtx = new AudioContext();
+
+function playNoise(noiseDuration, bandHz=1000) {
+  const bufferSize = audioCtx.sampleRate * noiseDuration
+  const noiseBuffer = new AudioBuffer({
+    length: bufferSize,
+    sampleRate: audioCtx.sampleRate,
+  })
+  const data = noiseBuffer.getChannelData(0)
+  for (let i = 0; i < bufferSize; i++) {
+    data[i] = Math.random() * 2 - 1;
+  }
+  const noise = new AudioBufferSourceNode(audioCtx, {
+    buffer: noiseBuffer,
+  })
+  const bandpass = new BiquadFilterNode(audioCtx, {
+    type: "bandpass",
+    frequency: bandHz,
+  })
+  const gain = new GainNode(audioCtx)
+  gain.gain.setValueCurveAtTime([0.5, 1/10, 0], audioCtx.currentTime, noiseDuration)
+  noise.connect(bandpass).connect(gain).connect(audioCtx.destination)
+  noise.start()
+}
+
+
+</script>