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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>MQ Spectral Editor</title>
<style>
body {
font-family: monospace;
margin: 20px;
background: #1a1a1a;
color: #ddd;
}
.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; }
input[type="file"] { margin-right: 16px; }
.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;
}
#canvas {
border: 1px solid #555;
background: #000;
cursor: crosshair;
display: block;
margin-top: 10px;
}
#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>
<h2>MQ Spectral Editor</h2>
<div class="toolbar">
<input type="file" id="wavFile" accept=".wav">
<button id="testWavBtn">⚗ Test WAV</button>
<button id="extractBtn" disabled>Extract Partials</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="-60" step="any">
<label style="margin-left:16px;"><input type="checkbox" id="integratePhase" checked> Integrate phase</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 style="position: relative;">
<canvas id="canvas" width="1400" height="600"></canvas>
<!-- Mini spectrum viewer (bottom-right overlay) -->
<div id="spectrumViewer" style="position: absolute; bottom: 10px; right: 10px; width: 200px; height: 100px; background: rgba(30, 30, 30, 0.9); border: 1px solid #555; border-radius: 3px; pointer-events: none;">
<canvas id="spectrumCanvas" width="200" height="100"></canvas>
</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>
let audioBuffer = null;
let viewer = null;
let audioContext = null;
let currentSource = null;
let extractedPartials = null;
let stftCache = null;
const wavFile = document.getElementById('wavFile');
const extractBtn = document.getElementById('extractBtn');
const playBtn = document.getElementById('playBtn');
const stopBtn = document.getElementById('stopBtn');
const canvas = document.getElementById('canvas');
const status = document.getElementById('status');
const hopSize = document.getElementById('hopSize');
const threshold = document.getElementById('threshold');
const keepPct = document.getElementById('keepPct');
const keepPctLabel = document.getElementById('keepPctLabel');
const fftSize = 1024; // Fixed
keepPct.addEventListener('input', () => {
keepPctLabel.textContent = keepPct.value + '%';
if (viewer && extractedPartials) {
viewer.setKeepCount(Math.max(1, Math.ceil(extractedPartials.length * parseInt(keepPct.value) / 100)));
}
});
// 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');
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);
if (label.startsWith('Test WAV')) validateTestWAVPeaks(stftCache);
}, 10);
}
// Load WAV file
wavFile.addEventListener('change', async (e) => {
const file = e.target.files[0];
if (!file) return;
setStatus('Loading WAV...', 'info');
try {
const arrayBuffer = await file.arrayBuffer();
const ctx = new AudioContext();
const buf = await ctx.decodeAudioData(arrayBuffer);
loadAudioBuffer(buf, `Loaded: ${file.name}`);
} catch (err) {
setStatus('Error loading WAV: ' + err.message, 'error');
console.error(err);
}
});
// Test WAV: generate synthetic signal (two sine waves) in-memory
document.getElementById('testWavBtn').addEventListener('click', () => {
initAudioContext();
const SR = 32000;
const duration = 2.0;
const numSamples = SR * duration;
// Two sine waves: 440 Hz (A4) + 660 Hz (E5, perfect fifth), equal amplitude
const buf = audioContext.createBuffer(1, numSamples, SR);
const data = buf.getChannelData(0);
for (let i = 0; i < numSamples; ++i) {
data[i] = 0.5 * Math.sin(2 * Math.PI * 440 * i / SR)
+ 0.5 * Math.sin(2 * Math.PI * 660 * i / SR);
}
loadAudioBuffer(buf, 'Test WAV: 440Hz + 660Hz (2s, 32kHz)');
});
// Update cache when hop size changes
hopSize.addEventListener('change', () => {
const val = Math.max(64, parseInt(hopSize.value) || 64);
hopSize.value = val;
if (stftCache) {
setStatus('Updating STFT cache...', 'info');
setTimeout(() => {
stftCache.setHopSize(val);
setStatus(`Cache updated (${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),
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;
viewer.setFrames(result.frames);
setStatus(`Extracted ${result.partials.length} partials`, 'info');
viewer.setPartials(result.partials);
viewer.setKeepCount(Math.max(1, Math.ceil(result.partials.length * parseInt(keepPct.value) / 100)));
} catch (err) {
setStatus('Extraction error: ' + err.message, 'error');
console.error(err);
}
extractBtn.disabled = false;
}, 50);
}
// Extract partials
extractBtn.addEventListener('click', () => {
if (!audioBuffer) return;
runExtraction();
});
threshold.addEventListener('change', () => {
if (stftCache) runExtraction();
});
// Play audio
playBtn.addEventListener('click', () => {
if (!audioBuffer || !audioContext) return;
stopAudio();
const startTime = audioContext.currentTime;
currentSource = audioContext.createBufferSource();
currentSource.buffer = audioBuffer;
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('Playing...', 'info');
// Animate playhead
function updatePlayhead() {
if (!currentSource) return;
const elapsed = audioContext.currentTime - startTime;
viewer.setPlayheadTime(elapsed);
requestAnimationFrame(updatePlayhead);
}
updatePlayhead();
});
// Stop audio
stopBtn.addEventListener('click', () => {
stopAudio();
});
function stopAudio() {
if (currentSource) {
try {
currentSource.stop();
} catch (e) {
// Already stopped
}
currentSource = null;
}
if (viewer) {
viewer.setPlayheadTime(-1);
}
playBtn.disabled = false;
stopBtn.disabled = true;
setStatus('Stopped', 'info');
}
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');
// Synthesize PCM from top-N% partials by amplitude
const sampleRate = audioBuffer.sampleRate;
const duration = audioBuffer.duration;
const keepCount = Math.max(1, Math.ceil(extractedPartials.length * parseInt(keepPct.value) / 100));
const partialsToUse = extractedPartials.slice(0, keepCount);
setStatus(`Synthesizing ${keepCount}/${extractedPartials.length} partials (${keepPct.value}%)...`, 'info');
const integratePhase = document.getElementById('integratePhase').checked;
const pcm = synthesizeMQ(partialsToUse, sampleRate, duration, integratePhase);
// Build STFT cache for synth signal (for FFT comparison via key 'a')
if (viewer) {
const synthStft = new STFTCache(pcm, sampleRate, fftSize, parseInt(hopSize.value));
viewer.setSynthStftCache(synthStft);
}
// Create audio buffer
const synthBuffer = audioContext.createBuffer(1, pcm.length, sampleRate);
synthBuffer.getChannelData(0).set(pcm);
const startTime = audioContext.currentTime;
currentSource = audioContext.createBufferSource();
currentSource.buffer = synthBuffer;
currentSource.connect(audioContext.destination);
currentSource.start();
currentSource.onended = () => {
currentSource = null;
playBtn.disabled = false;
stopBtn.disabled = true;
viewer.setPlayheadTime(-1);
setStatus('Stopped', 'info');
};
playBtn.disabled = true;
stopBtn.disabled = false;
setStatus(`Playing synthesized (${keepCount}/${extractedPartials.length} partials, ${keepPct.value}%)...`, 'info');
// Animate playhead
function updatePlayhead() {
if (!currentSource) return;
const elapsed = audioContext.currentTime - startTime;
viewer.setPlayheadTime(elapsed);
requestAnimationFrame(updatePlayhead);
}
updatePlayhead();
}
// 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();
}
}
});
// --- 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>
|
