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alternative equalizer tuning

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ed 2021-09-09 00:27:18 +02:00
parent d2800473e4
commit 759b0a994d
2 changed files with 51 additions and 8 deletions
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33
copyparty/web/browser.js
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@ -1063,6 +1063,31 @@ var audio_eq = (function () {
"last_au": null "last_au": null
}; };
// some browsers have insane high-frequency boost
// (or rather the actual problem is Q but close enough)
var cali = (function () {
try {
var ac = new AudioContext(),
fi = ac.createBiquadFilter(),
freqs = new Float32Array(1),
mag = new Float32Array(1),
phase = new Float32Array(1);
freqs[0] = 14000;
fi.type = 'peaking';
fi.frequency.value = 18000;
fi.Q.value = 0.8;
fi.gain.value = 1;
fi.getFrequencyResponse(freqs, mag, phase);
return mag[0]; // 1.0407 good, 1.0563 bad
}
catch (ex) {
return 0;
}
})(),
mp = cali < 1.05;
var cfg = [ // hz, q, g var cfg = [ // hz, q, g
[31.25 * 0.88, 0, 1.4], // shelf [31.25 * 0.88, 0, 1.4], // shelf
[31.25 * 1.04, 0.7, 0.96], // peak [31.25 * 1.04, 0.7, 0.96], // peak
@ -1073,10 +1098,10 @@ var audio_eq = (function () {
[1000, 0.9, 1.1], [1000, 0.9, 1.1],
[2000, 0.9, 1.105], [2000, 0.9, 1.105],
[4000, 0.88, 1.05], [4000, 0.88, 1.05],
[8000 * 1.006, 0.73, 1.24], [8000 * 1.006, 0.73, mp ? 1.24 : 1.2],
[16000 * 0.89, 0.7, 1.26], // peak [16000 * 0.89, 0.7, mp ? 1.26 : 1.2], // peak
[16000 * 1.13, 0.82, 1.09], // peak [16000 * 1.13, 0.82, mp ? 1.09 : 0.75], // peak
[16000 * 1.205, 0, 1.9] // shelf [16000 * 1.205, 0, mp ? 1.9 : 1.85] // shelf
]; ];
try { try {

26
docs/biquad.html
View file

@ -3,6 +3,24 @@
setTimeout(location.reload.bind(location), 700); setTimeout(location.reload.bind(location), 700);
document.documentElement.scrollLeft = 0; document.documentElement.scrollLeft = 0;
var cali = (function() {
var ac = new AudioContext(),
fi = ac.createBiquadFilter(),
freqs = new Float32Array(1),
mag = new Float32Array(1),
phase = new Float32Array(1);
freqs[0] = 14000;
fi.type = 'peaking';
fi.frequency.value = 18000;
fi.Q.value = 0.8;
fi.gain.value = 1;
fi.getFrequencyResponse(freqs, mag, phase);
return mag[0]; // 1.0407 good, 1.0563 bad
})(),
mp = cali < 1.05;
var can = document.createElement('canvas'), var can = document.createElement('canvas'),
cc = can.getContext('2d'), cc = can.getContext('2d'),
w = 2048, w = 2048,
@ -28,12 +46,12 @@ var cfg = [ // hz, q, g
[1000, 0.9, 1.1], [1000, 0.9, 1.1],
[2000, 0.9, 1.105], [2000, 0.9, 1.105],
[4000, 0.88, 1.05], [4000, 0.88, 1.05],
[8000 * 1.006, 0.73, 1.24], [8000 * 1.006, 0.73, mp ? 1.24 : 1.2],
//[16000 * 1.00, 0.5, 1.75], // peak.v1 //[16000 * 1.00, 0.5, 1.75], // peak.v1
//[16000 * 1.19, 0, 1.8] // shelf.v1 //[16000 * 1.19, 0, 1.8] // shelf.v1
[16000 * 0.89, 0.7, 1.26], // peak [16000 * 0.89, 0.7, mp ? 1.26 : 1.2], // peak
[16000 * 1.13, 0.82, 1.09], // peak [16000 * 1.13, 0.82, mp ? 1.09 : 0.75], // peak
[16000 * 1.205, 0, 1.9] // shelf [16000 * 1.205, 0, mp ? 1.9 : 1.85] // shelf
]; ];
var freqs = new Float32Array(22000), var freqs = new Float32Array(22000),