Add import/export for legacy graphic EQ
Export outputs EqualizerAPO-compatible format with all 16 bands. Import accepts EqualizerAPO format or simple freq/gain pairs, maps to nearest GEQ band by log-frequency distance, and ignores Q values since legacy mode uses fixed dB sliders. https://claude.ai/code/session_01AgSx7SP1dH5KFmpGXCAUvU
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tryptz
edideaur
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commit
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2 changed files with 116 additions and 0 deletions
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index.html
20
index.html
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@ -4352,6 +4352,26 @@
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<button id="legacy-graphic-eq-reset-btn" class="btn-secondary">
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Reset
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</button>
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<button
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id="legacy-geq-import-btn"
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class="btn-secondary"
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title="Import EQ from text file (frequency/gain pairs, Q values ignored)"
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>
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Import
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</button>
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<button
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id="legacy-geq-export-btn"
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class="btn-secondary"
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title="Export EQ to text file"
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>
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Export
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</button>
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<input
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type="file"
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id="legacy-geq-import-file"
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accept=".txt"
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style="display: none"
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/>
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</div>
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</div>
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@ -1383,6 +1383,102 @@ export async function initializeSettings(scrobbler, player, api, ui) {
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});
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});
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// Legacy EQ Import / Export
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const GEQ_FREQUENCIES = [25, 40, 63, 100, 160, 250, 400, 630, 1000, 1600, 2500, 4000, 6300, 10000, 16000, 20000];
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const legacyGeqExportBtn = document.getElementById('legacy-geq-export-btn');
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const legacyGeqImportBtn = document.getElementById('legacy-geq-import-btn');
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const legacyGeqImportFile = document.getElementById('legacy-geq-import-file');
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if (legacyGeqExportBtn) {
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legacyGeqExportBtn.addEventListener('click', () => {
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const lines = [`Preamp: ${geqPreamp.toFixed(1)} dB`];
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GEQ_FREQUENCIES.forEach((freq, i) => {
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lines.push(`Filter ${i + 1}: ON PK Fc ${freq} Hz Gain ${geqGains[i].toFixed(1)} dB Q 1.41`);
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});
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const blob = new Blob([lines.join('\n')], { type: 'text/plain' });
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const url = URL.createObjectURL(blob);
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const a = document.createElement('a');
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a.href = url;
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a.download = 'legacy-eq.txt';
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a.click();
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URL.revokeObjectURL(url);
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});
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}
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if (legacyGeqImportBtn && legacyGeqImportFile) {
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legacyGeqImportBtn.addEventListener('click', () => legacyGeqImportFile.click());
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legacyGeqImportFile.addEventListener('change', (e) => {
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const file = e.target.files[0];
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if (!file) return;
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const reader = new FileReader();
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reader.onload = (event) => {
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try {
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const text = event.target.result;
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const lines = text.split('\n');
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let preamp = 0;
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const importedPoints = [];
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for (const line of lines) {
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const preampMatch = line.match(/Preamp:\s*([-\d.]+)\s*dB/i);
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if (preampMatch) {
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preamp = parseFloat(preampMatch[1]);
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continue;
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}
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// EqualizerAPO format: Filter N: ON PK Fc XXXX Hz Gain X.X dB Q X.XX
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const filterMatch = line.match(
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/Filter\s+\d+:\s*ON\s+\w+\s+Fc\s+([\d.]+)\s*Hz\s+Gain\s+([-\d.]+)\s*dB/i
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);
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if (filterMatch) {
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importedPoints.push({ freq: parseFloat(filterMatch[1]), gain: parseFloat(filterMatch[2]) });
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continue;
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}
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// Simple two-column format: freq gain (whitespace/tab/comma separated)
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const simpleMatch = line.trim().match(/^([\d.]+)[,\s\t]+([-\d.]+)/);
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if (simpleMatch) {
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importedPoints.push({ freq: parseFloat(simpleMatch[1]), gain: parseFloat(simpleMatch[2]) });
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}
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}
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if (importedPoints.length === 0) return;
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// Sort by frequency
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importedPoints.sort((a, b) => a.freq - b.freq);
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// Map imported points to the 16 GEQ bands using nearest-frequency matching
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const newGains = GEQ_FREQUENCIES.map((targetFreq) => {
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// Find the closest imported point by log-frequency distance
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let closest = importedPoints[0];
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let minDist = Math.abs(Math.log10(targetFreq) - Math.log10(closest.freq));
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for (let j = 1; j < importedPoints.length; j++) {
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const dist = Math.abs(Math.log10(targetFreq) - Math.log10(importedPoints[j].freq));
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if (dist < minDist) {
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minDist = dist;
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closest = importedPoints[j];
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}
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}
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// Clamp to slider range
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return Math.max(parseFloat(geqRange.min), Math.min(parseFloat(geqRange.max), closest.gain));
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});
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geqGains = newGains;
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geqPreamp = Math.max(-20, Math.min(20, preamp));
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equalizerSettings.setGraphicEqGains(geqGains);
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equalizerSettings.setGraphicEqPreamp(geqPreamp);
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audioContextManager.setGraphicEqAllGains(geqGains);
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audioContextManager.setGraphicEqPreamp(geqPreamp);
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geqSyncAllSliders();
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geqPreampSliders.forEach((s) => (s.value = geqPreamp));
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geqPreampValues.forEach((v) => (v.textContent = `${geqPreamp.toFixed(1)} dB`));
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geqPresetSelects.forEach((s) => (s.value = ''));
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} catch (err) {
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console.error('[Legacy GEQ Import] Failed:', err);
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}
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};
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reader.readAsText(file);
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e.target.value = '';
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});
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}
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// ========================================
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// Precision AutoEQ - Redesigned Equalizer
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// ========================================
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