Playing with starship noise
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404.md
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404.md
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@ -3,8 +3,7 @@ title: 404 Not Found
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permalink: /404.html
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---
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These pages have recently been rearranged,
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but let's see if we can't get you what you were looking for.
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Let's see if we can't get you what you were looking for.
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Software
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--------
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@ -17,9 +16,9 @@ Something Else
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------------
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Please [email me](mailto:neale@woozle.org) and I'll help you find it!
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Be sure to let me know what it is you're trying to locate.
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If you have the original URL of the thing,
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that's very helpful.
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But if you don't, it's okay,
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just tell me as much detail as you can about what you're looking for.
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just tell me as much detail as you can about what you're trying to find.
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@ -36,7 +36,6 @@
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<nav class="right">
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<ul>
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<li><a href="https://github.com/nealey/">GitHub</a></li>
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<li><a href="https://google.com/+NealePickett/">Google+</a></li>
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<li><a href="mailto:neale@woozle.org">Email</a></li>
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</nav>
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</footer>
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@ -5,7 +5,7 @@ title: Toys
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Here is some various junk I've done. Maybe you'll find it amusing.
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Maybe you'll just wonder why I spend so much time on this garbage.
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* [Starship Noise Generator](starship.html)
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* [Starship Noise Generator](starship/)
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* If you need to write someone a letter but really don't want to, try my
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[social letter generator](letter.html)
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* [Crunt](crunt.html)
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@ -1,65 +0,0 @@
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---
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title: Starship Noise Generator
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---
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<div>
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<input id="fader" type="range" min="0" max="10" step="0.01"> Gain
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</div>
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I work in a building with no HVAC,
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which means we can hear *everything* people are saying,
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anywhere in the building.
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This page is a low-CPU noise generator that runs entirely in JavaScript.
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Once it starts,
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you don't need an Internet connection to keep it going.
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You can leave it running forever, if you like.
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For those interested,
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it uses the new (in 2017) and seriously powerful
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[Web Audio API](https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API).
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<script>
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function whiteNoise(audioCtx) {
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var bufferSize = 17 * audioCtx.sampleRate,
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noiseBuffer = audioCtx.createBuffer(1, bufferSize, audioCtx.sampleRate),
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output = noiseBuffer.getChannelData(0);
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for (var i = 0; i < bufferSize; i++) {
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output[i] = Math.random() * 2 - 1;
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}
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var whiteNoise = audioCtx.createBufferSource();
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whiteNoise.buffer = noiseBuffer;
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whiteNoise.loop = true;
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whiteNoise.start(0);
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return whiteNoise;
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}
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function bandpassFilter(audioCtx, freq, gain) {
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var filt = audioCtx.createBiquadFilter();
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filt.type = "bandpass";
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filt.frequency.value = freq;
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filt.gain.value = gain;
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return filt;
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}
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function boop() {
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var audioCtx = new window.AudioContext();
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var synth = whiteNoise(audioCtx);
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var filterA = bandpassFilter(audioCtx, 100, 20);
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var filterB = bandpassFilter(audioCtx, 50, 20);
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var gainA = audioCtx.createGain();
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whiteNoise(audioCtx).connect(filterA);
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filterA.connect(filterB);
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filterB.connect(gainA);
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gainA.connect(audioCtx.destination);
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function setFade() {
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var faderPos = document.querySelector("#fader").value;
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gainA.gain.value = faderPos;
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}
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setFade();
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document.querySelector("#fader").addEventListener("input", setFade);
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}
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window.addEventListener("load", boop);
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</script>
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File diff suppressed because one or more lines are too long
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After Width: | Height: | Size: 13 KiB |
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@ -0,0 +1,111 @@
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<!DOCTYPE html>
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<html lang="en-US">
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<head>
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<meta charset='utf-8'>
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<meta name="viewport" content="width=device-width">
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<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:regular,bold,italic">
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<link rel="stylesheet" media="screen" href="/assets/css/default.css">
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<link rel="icon" href="icon.svg">
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<link rel="manifest" href="manifest.webmanifest">
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<style>
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#play {
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padding: 0;
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border: 0;
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margin: 1em;
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font-size: 2em;
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background: inherit;
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}
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</style>
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<title>Starship Noise Generator</title>
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<script>
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function whiteNoise(audioCtx) {
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var bufferSize = 17 * audioCtx.sampleRate,
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noiseBuffer = audioCtx.createBuffer(1, bufferSize, audioCtx.sampleRate),
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output = noiseBuffer.getChannelData(0);
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for (var i = 0; i < bufferSize; i++) {
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output[i] = Math.random() * 2 - 1;
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}
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var whiteNoise = audioCtx.createBufferSource();
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whiteNoise.buffer = noiseBuffer;
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whiteNoise.loop = true;
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whiteNoise.start(0);
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return whiteNoise;
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}
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function bandpassFilter(audioCtx, freq, gain) {
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var filt = audioCtx.createBiquadFilter();
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filt.type = "bandpass";
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filt.frequency.value = freq;
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filt.gain.value = gain;
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return filt;
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}
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function init() {
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var audioCtx = new window.AudioContext();
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var synth = whiteNoise(audioCtx);
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var filterA = bandpassFilter(audioCtx, 100, 20);
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var filterB = bandpassFilter(audioCtx, 50, 20);
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var gainA = audioCtx.createGain();
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whiteNoise(audioCtx).connect(filterA);
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filterA.connect(filterB);
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filterB.connect(gainA);
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gainA.connect(audioCtx.destination);
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audioCtx.suspend();
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function setFade() {
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var faderPos = document.querySelector("#fader").value;
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gainA.gain.value = faderPos;
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}
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document.querySelector("#fader").addEventListener("input", setFade);
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setFade();
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document.querySelector("#play").addEventListener("click", e => {
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console.log(audioCtx.state);
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if (audioCtx.state == 'running') {
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audioCtx.suspend();
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} else {
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audioCtx.resume();
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}
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});
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}
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if (document.readyState === "loading") {
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document.addEventListener("DOMContentLoaded", init);
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} else {
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init();
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}
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</script>
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</head>
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<body>
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<h1 id="title">
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<span>Starship Noise Generator</span>
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</h1>
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<main id="content">
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<div>
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<button id="play">⏯️</button>
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🔉
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<input id="fader" type="range" min="0" max="10" step="0.01" />
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🔊
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</div>
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<p>I work in a building with no HVAC,
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which means we can hear <em>everything</em> people are saying,
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anywhere in the building.</p>
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<p>This page is a low-CPU noise generator that runs entirely in JavaScript.
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Once it starts,
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you don’t need an Internet connection to keep it going.
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You can leave it running forever, if you like.</p>
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<p>For those interested,
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it uses the new (in 2017) and seriously perfect for this application
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<a href="https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API">Web Audio API</a>.</p>
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</main>
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</body>
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</html>
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@ -0,0 +1,15 @@
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{
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"name": "Starship Noise Generator",
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"short_name": "Starship",
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"start_url": ".",
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"display": "standalone",
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"background_color": "#fff",
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"description": "Generates brown noise similar to a futuristic starship engine (or a modern HVAC system)",
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"icons": [
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{
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"src": "icon.svg",
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"sizes": "any"
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}
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]
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}
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