Audio Worklet ExampleMicrophone Audio SpectrogramUnderstanding ConvolutionHow to convert digital pulses to a sine wave using convolutionMultiple-Pass Moving Average FiltersA Sine-Cosine Encoder ExperimentAdjusting for imperfect geometry in a sine-cosine encoderWorking with audio samplesHow to plot audio recordings at any zoom levelSplit an audio recording into silent and non-silent spansPlay a note using WebAudioPlay a note using tone.js
Tachometer signal processing
function makeRcFilter(decay) {
var state = 0;
return (input) => {
state = state * (1 - decay) + input * decay;
return state;
}
}
crossings = {
let a = Array();
var prevTick;
for (let i = 0; i < ticks.length; i++) {
if (ticks[i] != 0) {
a.push(i);
}
}
return a;
}
frequencies = {
let a = Array();
// a.push({frequency: 0, x: 0});
for (let i = 1; i < crossings.length; i++) {
let period = crossings[i] - crossings[i-1];
let x = (crossings[i] + crossings[i-1]) / 2;
a.push({frequency: 1/period, x: x});
}
// a.push({frequency: 0, x: ticks.length - 1});
return a;
}
Purpose-built for displays of data
Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.
