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|
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>MQ Spectral Editor</title>
<style>
body {
font-family: monospace;
font-size: 14px;
margin: 20px;
background: #1a1a1a;
color: #ddd;
}
.page-title {
display: flex;
align-items: baseline;
gap: 16px;
margin-bottom: 10px;
}
.page-title h2 { margin: 0; }
#fileLabel {
font-size: 13px;
color: #8af;
opacity: 0.8;
}
.toolbar {
margin-bottom: 10px;
padding: 10px;
background: #2a2a2a;
border-radius: 4px;
}
button {
background: #3a3a3a;
color: #ddd;
border: 1px solid #555;
padding: 8px 16px;
margin-right: 8px;
cursor: pointer;
border-radius: 4px;
}
button:hover { background: #4a4a4a; }
button:disabled { opacity: 0.5; cursor: not-allowed; }
#extractBtn { background: #666; color: #fff; font-weight: bold; border-color: #888; }
input[type="file"] { display: none; }
.params {
display: inline-block;
margin-left: 20px;
}
label {
margin-right: 8px;
}
input[type="number"], select {
width: 80px;
background: #3a3a3a;
color: #ddd;
border: 1px solid #555;
padding: 4px;
border-radius: 3px;
}
.main-area {
display: flex;
align-items: flex-start;
gap: 10px;
margin-top: 10px;
}
#canvas {
border: 1px solid #555;
background: #000;
cursor: crosshair;
display: block;
flex-shrink: 0;
}
.right-panel {
background: #2a2a2a;
border: 1px solid #555;
border-radius: 4px;
padding: 12px;
min-width: 260px;
max-width: 260px;
max-height: 700px;
overflow-y: auto;
display: flex;
flex-direction: column;
gap: 6px;
box-sizing: border-box;
}
.panel-title {
font-size: 12px;
color: #888;
text-transform: uppercase;
letter-spacing: 1px;
border-bottom: 1px solid #444;
padding-bottom: 6px;
margin-bottom: 2px;
display: flex;
align-items: center;
gap: 6px;
}
.right-panel label {
display: flex;
align-items: center;
gap: 6px;
margin: 0;
cursor: pointer;
font-size: 14px;
}
/* Partial properties */
.prop-row {
display: flex;
justify-content: space-between;
align-items: baseline;
font-size: 13px;
padding: 2px 0;
}
.prop-label { color: #777; font-size: 12px; }
.curve-tabs {
display: flex;
gap: 2px;
margin-top: 8px;
margin-bottom: 4px;
}
.tab-btn {
flex: 1;
padding: 4px 0;
font-size: 12px;
margin: 0;
background: #222;
border-color: #444;
color: #888;
}
.tab-btn.active {
background: #3a3a3a;
border-color: #666;
color: #ddd;
}
.curve-grid {
display: grid;
grid-template-columns: 18px 1fr 1fr;
gap: 3px 4px;
align-items: center;
}
.curve-grid span { color: #666; font-size: 11px; }
.curve-grid input[type="number"] {
width: 100%;
background: #333;
color: #ccc;
border: 1px solid #444;
padding: 2px 4px;
border-radius: 2px;
font-size: 11px;
font-family: monospace;
box-sizing: border-box;
}
.curve-grid input[type="number"]:focus {
border-color: #666;
outline: none;
}
.partial-actions {
display: flex;
gap: 4px;
margin-top: 8px;
}
.partial-actions button {
flex: 1;
padding: 4px 6px;
font-size: 12px;
margin: 0;
}
.synth-grid {
display: grid;
grid-template-columns: auto 1fr;
gap: 4px 8px;
align-items: center;
}
.synth-grid span { color: #888; font-size: 12px; }
.synth-field-wrap {
display: flex;
align-items: center;
gap: 4px;
}
.synth-field-wrap input[type="number"] {
flex: 1;
min-width: 0;
background: #333;
color: #ccc;
border: 1px solid #444;
padding: 2px 4px;
border-radius: 2px;
font-size: 11px;
font-family: monospace;
box-sizing: border-box;
}
.synth-field-wrap input[type="number"]:focus { border-color: #666; outline: none; }
.jog-slider {
width: 44px;
height: 16px;
background: #1e1e1e;
border: 1px solid #444;
border-radius: 3px;
cursor: ew-resize;
position: relative;
flex-shrink: 0;
user-select: none;
overflow: hidden;
}
.jog-slider::before {
content: '';
position: absolute;
left: 50%; top: 3px; bottom: 3px;
width: 1px;
background: #484848;
transform: translateX(-50%);
}
.jog-thumb {
position: absolute;
top: 3px; bottom: 3px;
width: 6px;
background: #888;
border-radius: 2px;
left: calc(50% - 3px);
transition: left 0.12s ease;
}
.jog-slider:hover .jog-thumb { background: #aaa; }
.synth-grid input[type="number"]:focus { border-color: #666; outline: none; }
.synth-section {
border-top: 1px solid #444;
padding-top: 8px;
margin-top: auto;
}
/* resonator mode badge shown in partial header color swatch area */
.res-badge {
font-size: 9px;
color: #8cf;
border: 1px solid #8cf;
border-radius: 2px;
padding: 0 3px;
vertical-align: middle;
margin-left: 4px;
opacity: 0.8;
}
#status {
margin-top: 10px;
padding: 8px;
background: #2a2a2a;
border-radius: 4px;
min-height: 20px;
}
.info { color: #4af; }
.warn { color: #fa4; }
.error { color: #f44; }
</style>
</head>
<body>
<div class="page-title">
<h2>MQ Spectral Editor</h2>
<span id="fileLabel"></span>
</div>
<div class="toolbar">
<input type="file" id="wavFile" accept=".wav">
<button id="chooseFileBtn">📂 Open WAV</button>
<button id="testWavBtn">⚗ Test WAV</button>
<button id="extractBtn" disabled>Extract Partials</button>
<button id="autoSpreadAllBtn" disabled>Auto Spread All</button>
<button id="playBtn" disabled>▶ Play</button>
<button id="stopBtn" disabled>■ Stop</button>
<div class="params">
<label>Hop:</label>
<input type="number" id="hopSize" value="256" min="64" max="1024" step="64">
<label>Threshold (dB):</label>
<input type="number" id="threshold" value="-20" step="any">
<label style="margin-left:16px;" title="Weight spectrum by frequency before peak detection (f * FFT_Power(f)), accentuates high-frequency peaks">
<input type="checkbox" id="freqWeight"> f·Power
</label>
<label style="margin-left:16px;">Keep:</label>
<input type="range" id="keepPct" min="1" max="100" value="100" style="width:100px; vertical-align:middle;">
<span id="keepPctLabel" style="margin-left:4px;">100%</span>
</div>
</div>
<div class="main-area">
<div style="display:flex; flex-direction:column; gap:6px; flex-shrink:0;">
<div style="position: relative;">
<canvas id="canvas" width="1400" height="600"></canvas>
<canvas id="cursorCanvas" width="1400" height="600" style="position:absolute;top:0;left:0;pointer-events:none;"></canvas>
<!-- Mini spectrum viewer (bottom-right overlay) -->
<div id="spectrumViewer" style="position: absolute; bottom: 10px; right: 10px; width: 400px; height: 100px; background: rgba(30, 30, 30, 0.9); border: 1px solid #555; border-radius: 3px; pointer-events: none;">
<canvas id="spectrumCanvas" width="400" height="100"></canvas>
</div>
</div>
<!-- Amplitude bezier editor (shown when partial selected) -->
<div id="ampEditPanel" style="display:none;">
<div style="font-size:10px; color:#555; padding:2px 0 3px 1px; display:flex; align-items:center; gap:10px; text-transform:uppercase; letter-spacing:0.5px;">
<span>Amplitude</span>
<span id="ampEditTitle" style="color:#777; text-transform:none; letter-spacing:0;"></span>
<span style="color:#333; text-transform:none; letter-spacing:0;">drag control points · Esc to deselect</span>
</div>
<canvas id="ampEditCanvas" width="1400" height="120" style="border:1px solid #2a2a2a; background:#0e0e0e; cursor:crosshair; display:block;"></canvas>
</div>
</div>
<div class="right-panel">
<!-- Partial properties (visible when a partial is selected) -->
<div id="partialProps" style="display:none;">
<div class="panel-title">
<span id="propTitle">Partial #—</span>
<span id="propSwatch" style="display:inline-block;width:10px;height:10px;border-radius:2px;flex-shrink:0;"></span>
</div>
<div class="prop-row">
<span class="prop-label">Peak</span>
<span id="propPeak">—</span>
</div>
<div class="prop-row">
<span class="prop-label">Time</span>
<span id="propTime">—</span>
</div>
<div class="curve-tabs">
<button class="tab-btn active" data-tab="Freq">Freq</button>
<button class="tab-btn" data-tab="Amp">Amp</button>
<button class="tab-btn" data-tab="Synth">Synth</button>
</div>
<div class="tab-pane" id="tabFreq">
<div class="curve-grid" id="freqCurveGrid"></div>
</div>
<div class="tab-pane" id="tabAmp" style="display:none;">
<div class="curve-grid" id="ampCurveGrid"></div>
</div>
<div class="tab-pane" id="tabSynth" style="display:none;">
<div class="synth-grid" id="synthGrid"></div>
</div>
<div class="partial-actions">
<button id="mutePartialBtn">Mute</button>
<button id="deletePartialBtn">Delete</button>
</div>
</div>
<div id="noSelMsg" style="color:#555;font-size:13px;padding:2px 0;">Click a partial to select</div>
<!-- Synthesis options (always at bottom) -->
<div class="synth-section">
<div class="panel-title">Synthesis</div>
<label><input type="checkbox" id="integratePhase" checked> Integrate phase</label>
<label><input type="checkbox" id="disableJitter"> Disable jitter</label>
<label><input type="checkbox" id="disableSpread"> Disable spread</label>
<label title="Test mode: force resonator synthesis for all partials (ignores per-partial mode setting)"><input type="checkbox" id="forceResonator"> Resonator (all)</label>
<div style="margin-top:6px;">
<label style="display:flex;align-items:center;gap:6px;" title="LP filter coefficient k1 in (0,1]. 1.0 = bypass.">
LP k1
<input type="range" id="lpK1" min="0.001" max="1.0" step="0.001" value="1.0" style="flex:1;min-width:0;">
<span id="lpK1Val" style="width:44px;text-align:right;">bypass</span>
</label>
<label style="display:flex;align-items:center;gap:6px;" title="HP filter coefficient k2 in (0,1]. 1.0 = bypass.">
HP k2
<input type="range" id="hpK2" min="0.001" max="1.0" step="0.001" value="1.0" style="flex:1;min-width:0;">
<span id="hpK2Val" style="width:44px;text-align:right;">bypass</span>
</label>
</div>
</div>
</div>
</div>
<div id="tooltip" style="position: fixed; display: none; background: #2a2a2a; padding: 4px 8px; border: 1px solid #555; border-radius: 3px; pointer-events: none; font-size: 11px; z-index: 1000;"></div>
<div id="status">Load a WAV file to begin...</div>
<script src="fft.js"></script>
<script src="mq_extract.js"></script>
<script src="mq_synth.js"></script>
<script src="viewer.js"></script>
<script src="editor.js"></script>
<script>
// LP: y[n] = k*x[n] + (1-k)*y[n-1] => -3dB at cos(w) = (2-2k-k²)/(2(1-k))
function k1ToHz(k, sr) {
if (k >= 1.0) return sr / 2;
const cosW = (2 - 2*k - k*k) / (2*(1 - k));
return Math.acos(Math.max(-1, Math.min(1, cosW))) * sr / (2 * Math.PI);
}
// HP: y[n] = k*(y[n-1]+x[n]-x[n-1]) => -3dB from peak at cos(w) = 2k/(1+k²)
function k2ToHz(k, sr) {
if (k >= 1.0) return 0;
const cosW = 2*k / (1 + k*k);
return Math.acos(Math.max(-1, Math.min(1, cosW))) * sr / (2 * Math.PI);
}
function fmtHz(f) {
return f >= 1000 ? (f/1000).toFixed(1) + 'k' : Math.round(f) + 'Hz';
}
function getSR() { return (typeof audioBuffer !== 'undefined' && audioBuffer) ? audioBuffer.sampleRate : 44100; }
// LP/HP slider live display
document.getElementById('lpK1').addEventListener('input', function() {
const k = parseFloat(this.value);
const f = k1ToHz(k, getSR());
document.getElementById('lpK1Val').textContent = k >= 1.0 ? 'bypass' : fmtHz(f);
});
document.getElementById('hpK2').addEventListener('input', function() {
const k = parseFloat(this.value);
const f = k2ToHz(k, getSR());
document.getElementById('hpK2Val').textContent = k >= 1.0 ? 'bypass' : fmtHz(f);
});
let audioBuffer = null;
let viewer = null;
let audioContext = null;
let currentSource = null;
let extractedPartials = null;
let stftCache = null;
const wavFile = document.getElementById('wavFile');
const chooseFileBtn = document.getElementById('chooseFileBtn');
const extractBtn = document.getElementById('extractBtn');
const autoSpreadAllBtn = document.getElementById('autoSpreadAllBtn');
const playBtn = document.getElementById('playBtn');
const stopBtn = document.getElementById('stopBtn');
const canvas = document.getElementById('canvas');
const status = document.getElementById('status');
const fileLabel = document.getElementById('fileLabel');
const hopSize = document.getElementById('hopSize');
const threshold = document.getElementById('threshold');
const freqWeightCb = document.getElementById('freqWeight');
const keepPct = document.getElementById('keepPct');
const keepPctLabel = document.getElementById('keepPctLabel');
const fftSize = 1024; // Fixed
function getKeepCount() {
return Math.max(1, Math.ceil(extractedPartials.length * parseInt(keepPct.value) / 100));
}
keepPct.addEventListener('input', () => {
keepPctLabel.textContent = keepPct.value + '%';
if (viewer && extractedPartials) viewer.setKeepCount(getKeepCount());
});
// --- Editor ---
const editor = new PartialEditor();
editor.onPartialDeleted = () => {
if (viewer && extractedPartials)
viewer.setKeepCount(extractedPartials.length > 0 ? getKeepCount() : 0);
};
// Initialize audio context
function initAudioContext() {
if (!audioContext) {
audioContext = new (window.AudioContext || window.webkitAudioContext)();
}
}
// Shared: initialize editor from an AudioBuffer
function loadAudioBuffer(buffer, label) {
audioBuffer = buffer;
initAudioContext();
extractBtn.disabled = false;
playBtn.disabled = false;
setStatus('Computing STFT cache...', 'info');
// Reset partials from previous file
extractedPartials = null;
editor.setPartials(null);
setTimeout(() => {
const signal = audioBuffer.getChannelData(0);
stftCache = new STFTCache(signal, audioBuffer.sampleRate, fftSize, Math.max(64, parseInt(hopSize.value) || 64));
setStatus(`${label} — ${audioBuffer.duration.toFixed(2)}s, ${audioBuffer.sampleRate}Hz, ${audioBuffer.numberOfChannels}ch (${stftCache.getNumFrames()} frames cached)`, 'info');
viewer = new SpectrogramViewer(canvas, audioBuffer, stftCache);
editor.setViewer(viewer);
viewer.onPartialSelect = (i) => editor.onPartialSelect(i);
viewer.onRender = () => editor.onRender();
if (label.startsWith('Test WAV')) validateTestWAVPeaks(stftCache);
}, 10);
}
// File chooser button
chooseFileBtn.addEventListener('click', () => wavFile.click());
// Load WAV file
wavFile.addEventListener('change', async (e) => {
const file = e.target.files[0];
if (!file) return;
fileLabel.textContent = file.name;
setStatus('Loading WAV...', 'info');
try {
const arrayBuffer = await file.arrayBuffer();
const ctx = new AudioContext();
const buf = await ctx.decodeAudioData(arrayBuffer);
loadAudioBuffer(buf, `Loaded: ${file.name}`);
} catch (err) {
setStatus('Error loading WAV: ' + err.message, 'error');
console.error(err);
}
});
// Test WAV: generate synthetic signal (two sine waves) in-memory
document.getElementById('testWavBtn').addEventListener('click', () => {
initAudioContext();
const SR = 32000;
const duration = 2.0;
const numSamples = SR * duration;
// Two sine waves: 440 Hz (A4) + 660 Hz (E5, perfect fifth), equal amplitude
const buf = audioContext.createBuffer(1, numSamples, SR);
const data = buf.getChannelData(0);
for (let i = 0; i < numSamples; ++i) {
data[i] = 0.5 * Math.sin(2 * Math.PI * 440 * i / SR)
+ 0.5 * Math.sin(2 * Math.PI * 660 * i / SR);
}
fileLabel.textContent = 'test-440+660hz.wav';
loadAudioBuffer(buf, 'Test WAV: 440Hz + 660Hz (2s, 32kHz)');
});
// Update cache when hop size changes
hopSize.addEventListener('change', () => {
const val = Math.max(64, parseInt(hopSize.value) || 64);
hopSize.value = val;
if (stftCache) {
setStatus('Updating STFT cache...', 'info');
setTimeout(() => {
stftCache.setHopSize(val);
setStatus(`Cache updated (${stftCache.getNumFrames()} frames)`, 'info');
if (viewer) viewer.render();
}, 10);
}
});
function runExtraction() {
if (!stftCache) return;
setStatus('Extracting partials...', 'info');
extractBtn.disabled = true;
setTimeout(() => {
try {
const params = {
fftSize: fftSize,
hopSize: parseInt(hopSize.value),
threshold: parseFloat(threshold.value),
freqWeight: freqWeightCb.checked,
sampleRate: audioBuffer.sampleRate
};
const result = extractPartials(params, stftCache);
// Sort by decreasing peak amplitude
result.partials.sort((a, b) => {
const peakA = a.amps.reduce((m, v) => Math.max(m, v), 0);
const peakB = b.amps.reduce((m, v) => Math.max(m, v), 0);
return peakB - peakA;
});
extractedPartials = result.partials;
editor.setPartials(result.partials);
viewer.setFrames(result.frames);
setStatus(`Extracted ${result.partials.length} partials`, 'info');
viewer.setPartials(result.partials);
viewer.setKeepCount(getKeepCount());
viewer.selectPartial(-1);
} catch (err) {
setStatus('Extraction error: ' + err.message, 'error');
console.error(err);
}
extractBtn.disabled = false;
autoSpreadAllBtn.disabled = false;
}, 50);
}
extractBtn.addEventListener('click', () => {
if (!audioBuffer) return;
runExtraction();
});
autoSpreadAllBtn.addEventListener('click', () => {
if (!extractedPartials || !stftCache) return;
const fs = stftCache.fftSize;
const sr = audioBuffer.sampleRate;
const defaults = { decay_alpha: 0.1, jitter: 0.05, spread_above: 0.02, spread_below: 0.02 };
for (const p of extractedPartials) {
const {spread_above, spread_below} = autodetectSpread(p, stftCache, fs, sr);
if (!p.replicas) p.replicas = { ...defaults };
p.replicas.spread_above = spread_above;
p.replicas.spread_below = spread_below;
}
if (viewer) viewer.render();
const sel = viewer ? viewer.selectedPartial : -1;
if (sel >= 0) editor.onPartialSelect(sel);
setStatus(`Auto-spread applied to ${extractedPartials.length} partials`, 'info');
});
threshold.addEventListener('change', () => {
if (stftCache) runExtraction();
});
freqWeightCb.addEventListener('change', () => {
if (stftCache) runExtraction();
});
function playAudioBuffer(buffer, statusMsg) {
const startTime = audioContext.currentTime;
currentSource = audioContext.createBufferSource();
currentSource.buffer = buffer;
currentSource.connect(audioContext.destination);
currentSource.start();
currentSource.onended = () => {
currentSource = null;
playBtn.disabled = false;
stopBtn.disabled = true;
viewer.setPlayheadTime(-1);
setStatus('Stopped', 'info');
};
playBtn.disabled = true;
stopBtn.disabled = false;
setStatus(statusMsg, 'info');
function tick() {
if (!currentSource) return;
viewer.setPlayheadTime(audioContext.currentTime - startTime);
requestAnimationFrame(tick);
}
tick();
}
function stopAudio() {
if (currentSource) {
try { currentSource.stop(); } catch (e) {}
currentSource = null;
}
if (viewer) viewer.setPlayheadTime(-1);
playBtn.disabled = false;
stopBtn.disabled = true;
setStatus('Stopped', 'info');
}
// Play audio
playBtn.addEventListener('click', () => {
if (!audioBuffer || !audioContext) return;
stopAudio();
playAudioBuffer(audioBuffer, 'Playing...');
});
// Stop audio
stopBtn.addEventListener('click', () => {
stopAudio();
});
function setStatus(msg, type = '') {
status.innerHTML = msg;
status.className = type;
}
// Play synthesized audio
function playSynthesized() {
if (!extractedPartials || extractedPartials.length === 0) {
setStatus('No partials extracted yet', 'warn');
return;
}
if (!audioBuffer || !audioContext) return;
stopAudio();
setStatus('Synthesizing...', 'info');
const keepCount = getKeepCount();
const partialsToUse = extractedPartials.slice(0, keepCount).filter(p => !p.muted);
setStatus(`Synthesizing ${partialsToUse.length}/${extractedPartials.length} partials (${keepPct.value}%)...`, 'info');
const integratePhase = document.getElementById('integratePhase').checked;
const disableJitter = document.getElementById('disableJitter').checked;
const disableSpread = document.getElementById('disableSpread').checked;
const forceResonator = document.getElementById('forceResonator').checked;
const lpK1Raw = parseFloat(document.getElementById('lpK1').value);
const hpK2Raw = parseFloat(document.getElementById('hpK2').value);
const k1 = lpK1Raw < 1.0 ? lpK1Raw : null;
const k2 = hpK2Raw < 1.0 ? hpK2Raw : null;
const pcm = synthesizeMQ(partialsToUse, audioBuffer.sampleRate, audioBuffer.duration,
integratePhase, {disableJitter, disableSpread, forceResonator, k1, k2});
if (viewer) {
viewer.setSynthStftCache(new STFTCache(pcm, audioBuffer.sampleRate, fftSize, parseInt(hopSize.value)));
}
const synthBuffer = audioContext.createBuffer(1, pcm.length, audioBuffer.sampleRate);
synthBuffer.getChannelData(0).set(pcm);
playAudioBuffer(synthBuffer, `Playing synthesized (${partialsToUse.length}/${extractedPartials.length} partials, ${keepPct.value}%)...`);
}
// Keyboard shortcuts
document.addEventListener('keydown', (e) => {
if (e.target.tagName === 'INPUT' || e.target.tagName === 'TEXTAREA') return;
if (e.code === 'Digit1') {
e.preventDefault();
playSynthesized();
} else if (e.code === 'Digit2') {
e.preventDefault();
if (!playBtn.disabled) {
playBtn.click();
}
} else if (e.code === 'KeyP') {
e.preventDefault();
if (viewer) viewer.togglePeaks();
} else if (e.code === 'KeyA') {
e.preventDefault();
if (viewer) {
viewer.showSynthFFT = !viewer.showSynthFFT;
viewer.renderSpectrum();
}
} else if (e.code === 'KeyE') {
e.preventDefault();
if (!extractBtn.disabled) extractBtn.click();
} else if (e.code === 'Escape') {
if (viewer) viewer.selectPartial(-1);
}
});
// Curve tab switching
document.querySelectorAll('.tab-btn').forEach(btn => {
btn.addEventListener('click', () => {
document.querySelectorAll('.tab-btn').forEach(b => b.classList.remove('active'));
btn.classList.add('active');
document.querySelectorAll('.tab-pane').forEach(p => p.style.display = 'none');
document.getElementById('tab' + btn.dataset.tab).style.display = '';
});
});
// --- Test WAV peak validation ---
function validateTestWAVPeaks(cache) {
const SR = cache.sampleRate;
const N = cache.fftSize;
const binWidth = SR / N; // Hz per bin
const numBins = N / 2;
const numBars = 100; // mini-spectrum bar count
// Use a mid-signal frame (avoid edge effects)
const midFrame = cache.frames[Math.floor(cache.frames.length / 2)];
if (!midFrame) { console.error('[TestWAV] No frames computed'); return; }
const sq = midFrame.squaredAmplitude;
const t = midFrame.time;
console.group('[TestWAV] Peak validation @ t=' + t.toFixed(3) + 's');
// Top 5 bins by magnitude
const ranked = Array.from(sq)
.map((v, i) => ({ bin: i, freq: i * binWidth, db: 10 * Math.log10(Math.max(v, 1e-20)) }))
.sort((a, b) => b.db - a.db);
console.log('Top 5 FFT bins:');
ranked.slice(0, 5).forEach(x =>
console.log(` bin ${x.bin.toString().padStart(3)}: ${x.freq.toFixed(1).padStart(7)}Hz ${x.db.toFixed(1)}dB`));
// Expected bins for 440/660 Hz
const bin440 = Math.round(440 / binWidth);
const bin660 = Math.round(660 / binWidth);
const db440 = 10 * Math.log10(Math.max(sq[bin440], 1e-20));
const db660 = 10 * Math.log10(Math.max(sq[bin660], 1e-20));
console.log(`440Hz → bin ${bin440} (${(bin440 * binWidth).toFixed(1)}Hz): ${db440.toFixed(1)}dB`);
console.log(`660Hz → bin ${bin660} (${(bin660 * binWidth).toFixed(1)}Hz): ${db660.toFixed(1)}dB`);
// Validate: 440/660 Hz must be in top-10
const top10Freqs = ranked.slice(0, 10).map(x => x.freq);
const pass440 = top10Freqs.some(f => Math.abs(f - 440) < binWidth * 2);
const pass660 = top10Freqs.some(f => Math.abs(f - 660) < binWidth * 2);
console.log('Peak check: 440Hz ' + (pass440 ? 'PASS ✓' : 'FAIL ✗') +
', 660Hz ' + (pass660 ? 'PASS ✓' : 'FAIL ✗'));
// Mini-spectrum: which bar do these peaks land in?
const bar440 = Math.floor(bin440 * numBars / numBins);
const bar660 = Math.floor(bin660 * numBars / numBins);
const sampledBin440 = Math.floor(bar440 * numBins / numBars);
const sampledBin660 = Math.floor(bar660 * numBars / numBars);
console.log('Mini-spectrum (linear scale, 100 bars):');
console.log(` 440Hz (bin ${bin440}) → bar ${bar440}/100 [bar samples bin ${sampledBin440} = ${(sampledBin440 * binWidth).toFixed(1)}Hz]`);
console.log(` 660Hz (bin ${bin660}) → bar ${bar660}/100 [bar samples bin ${Math.floor(bar660 * numBins / numBars)} = ${(Math.floor(bar660 * numBins / numBars) * binWidth).toFixed(1)}Hz]`);
if (bar440 < 5 || bar660 < 5) {
console.warn(' ⚠ BUG: peaks fall in bars ' + bar440 + ' and ' + bar660 +
' (leftmost ~' + Math.max(bar440, bar660) * 2 + 'px of 200px canvas)' +
' — linear scale hides low-frequency peaks. Need log-scale bar mapping.');
}
// Main spectrogram: confirm bins are in draw range
const mainFreqStart = 20, mainFreqEnd = 16000;
const inRange440 = 440 >= mainFreqStart && 440 <= mainFreqEnd;
const inRange660 = 660 >= mainFreqStart && 660 <= mainFreqEnd;
const norm440 = (Math.log2(440) - Math.log2(mainFreqStart)) / (Math.log2(mainFreqEnd) - Math.log2(mainFreqStart));
const norm660 = (Math.log2(660) - Math.log2(mainFreqStart)) / (Math.log2(mainFreqEnd) - Math.log2(mainFreqStart));
console.log('Main spectrogram (log Y-axis, 600px):');
console.log(` 440Hz: in range=${inRange440}, y=${Math.round(600 * (1 - norm440))}px, db=${db440.toFixed(1)}dB → intensity=${Math.min(1, Math.pow(Math.max(0, (db440 + 80) / 80), 2)).toFixed(2)}`);
console.log(` 660Hz: in range=${inRange660}, y=${Math.round(600 * (1 - norm660))}px, db=${db660.toFixed(1)}dB → intensity=${Math.min(1, Math.pow(Math.max(0, (db660 + 80) / 80), 2)).toFixed(2)}`);
console.groupEnd();
}
</script>
</body>
</html>
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