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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Classical Time Signature Lookup</title>
<style>
:root {
--primary-color: #0078d4;
--secondary-color: #f1f3f4;
--accent-color: #6c27be;
--text-color: #333;
--light-text: #555;
--border-color: #ddd;
}
body {
font-family: Arial, sans-serif;
background: #f8f8f8;
color: var(--text-color);
line-height: 1.6;
padding: 0;
margin: 0;
}
.container {
max-width: 1200px;
margin: 0 auto;
padding: 20px;
}
h1, h2, h3 {
color: var(--text-color);
}
h1 {
margin-bottom: 10px;
}
.subtitle {
color: var(--light-text);
margin-top: 0;
margin-bottom: 20px;
}
/* Tabs styling */
.tabs {
display: flex;
border-bottom: 1px solid var(--border-color);
margin-bottom: 20px;
}
.tab {
padding: 10px 20px;
cursor: pointer;
background-color: #f0f0f0;
border: 1px solid var(--border-color);
border-bottom: none;
margin-right: 5px;
border-radius: 5px 5px 0 0;
}
.tab.active {
background-color: white;
border-bottom: 2px solid white;
font-weight: bold;
color: var(--primary-color);
}
.tab-content {
display: none;
background: white;
padding: 20px;
border: 1px solid var(--border-color);
border-top: none;
border-radius: 0 0 5px 5px;
}
.tab-content.active {
display: block;
}
/* Search box styling */
.search-container {
margin: 20px 0;
}
.search-box {
display: flex;
gap: 10px;
margin-bottom: 15px;
}
input[type="text"] {
flex: 1;
padding: 10px;
font-size: 16px;
border: 1px solid var(--border-color);
border-radius: 4px;
}
button {
padding: 10px 20px;
background-color: var(--primary-color);
color: white;
border: none;
border-radius: 4px;
cursor: pointer;
font-size: 16px;
}
button:hover {
background-color: #005a9e;
}
/* Filters styling */
.filters {
display: flex;
flex-wrap: wrap;
gap: 15px;
margin-bottom: 20px;
}
.filter-group {
display: flex;
flex-direction: column;
min-width: 200px;
}
label {
margin-bottom: 5px;
font-weight: bold;
}
select {
padding: 8px;
border: 1px solid var(--border-color);
border-radius: 4px;
}
/* Results styling */
.results {
background: white;
border: 1px solid var(--border-color);
border-radius: 5px;
margin-top: 20px;
}
.results-header {
background-color: var(--secondary-color);
padding: 10px 15px;
border-bottom: 1px solid var(--border-color);
display: flex;
justify-content: space-between;
align-items: center;
}
.results-count {
font-weight: bold;
}
.results-content {
padding: 15px;
max-height: 600px;
overflow-y: auto;
}
.composer-section {
margin-bottom: 20px;
border-bottom: 1px solid var(--border-color);
padding-bottom: 10px;
}
.composer-name {
color: var(--primary-color);
font-size: 1.2em;
font-weight: bold;
cursor: pointer;
margin-bottom: 10px;
}
.composer-name:hover {
text-decoration: underline;
}
.work {
margin-bottom: 15px;
padding-left: 20px;
border-left: 3px solid var(--secondary-color);
}
.work-title {
font-weight: bold;
cursor: pointer;
margin-bottom: 8px;
}
.work-title:hover {
color: var(--primary-color);
}
.movement-list {
list-style-type: none;
padding-left: 20px;
margin: 0;
}
.movement {
padding: 5px 0;
display: flex;
justify-content: space-between;
border-bottom: 1px solid #f0f0f0;
}
.movement:last-child {
border-bottom: none;
}
.movement-title {
flex: 1;
}
.time-signature {
font-weight: bold;
background-color: var(--secondary-color);
padding: 2px 8px;
border-radius: 4px;
min-width: 40px;
text-align: center;
}
.collapsed {
display: none;
}
/* Stats styling */
.stats-container {
display: flex;
gap: 20px;
margin-bottom: 20px;
flex-wrap: wrap;
}
.stat-box {
background-color: white;
padding: 15px;
border-radius: 5px;
box-shadow: 0 2px 5px rgba(0,0,0,0.1);
flex: 1;
min-width: 150px;
text-align: center;
}
.stat-title {
font-size: 14px;
color: var(--light-text);
margin-bottom: 5px;
}
.stat-value {
font-size: 24px;
font-weight: bold;
color: var(--primary-color);
}
/* Visualization styling */
.chart-container {
margin: 20px 0;
border: 1px solid var(--border-color);
border-radius: 5px;
padding: 15px;
background: white;
}
.chart {
width: 100%;
height: 300px;
margin-top: 10px;
}
/* Random generator styling */
.random-container {
background: white;
border: 1px solid var(--border-color);
border-radius: 5px;
padding: 20px;
margin-top: 20px;
}
.random-result {
margin-top: 15px;
padding: 15px;
background-color: var(--secondary-color);
border-radius: 5px;
}
.random-title {
font-weight: bold;
font-size: 1.2em;
margin-bottom: 5px;
}
.random-details {
margin-top: 10px;
}
/* Advanced features */
.advanced-container {
margin-top: 20px;
}
.table-container {
overflow-x: auto;
margin-top: 15px;
}
table {
width: 100%;
border-collapse: collapse;
}
th, td {
padding: 8px 12px;
text-align: left;
border-bottom: 1px solid var(--border-color);
}
th {
background-color: var(--secondary-color);
}
tr:hover {
background-color: #f5f5f5;
}
pre {
background-color: #f0f0f0;
padding: 15px;
border-radius: 5px;
overflow-x: auto;
font-size: 14px;
}
footer {
margin-top: 30px;
padding: 15px 0;
text-align: center;
color: var(--light-text);
font-size: 14px;
border-top: 1px solid var(--border-color);
}
/* Responsive adjustments */
@media (max-width: 768px) {
.container {
padding: 10px;
}
.filters {
flex-direction: column;
}
.filter-group {
width: 100%;
}
.stats-container {
flex-direction: column;
}
.search-box {
flex-direction: column;
}
.tabs {
flex-wrap: wrap;
}
.tab {
margin-bottom: 5px;
}
}
</style>
</head>
<body>
<div class="container">
<h1>Classical Time Signature Lookup</h1>
<p class="subtitle">Explore time signatures from classical music compositions</p>
<div class="tabs">
<div class="tab active" onclick="showTab('search-tab')">Search</div>
<div class="tab" onclick="showTab('stats-tab')">Statistics</div>
<div class="tab" onclick="showTab('visualize-tab')">Visualize</div>
<div class="tab" onclick="showTab('random-tab')">Random Work</div>
<div class="tab" onclick="showTab('advanced-tab')">Advanced</div>
</div>
<!-- Search Tab -->
<div id="search-tab" class="tab-content active">
<div class="search-container">
<div class="search-box">
<input type="text" id="searchInput" placeholder="Search by composer, work title, or movement (e.g., 'Mozart Symphony 40', 'Moonlight Sonata')">
<button id="searchButton">Search</button>
</div>
<div class="filters">
<div class="filter-group">
<label for="composerFilter">Composer</label>
<select id="composerFilter">
<option value="">All Composers</option>
</select>
</div>
<div class="filter-group">
<label for="timeSignatureFilter">Time Signature</label>
<select id="timeSignatureFilter">
<option value="">All Time Signatures</option>
</select>
</div>
<div class="filter-group">
<label for="sortBy">Sort By</label>
<select id="sortBy">
<option value="composer">Composer</option>
<option value="title">Work Title</option>
<option value="timeSignature">Time Signature</option>
</select>
</div>
</div>
</div>
<div class="results">
<div class="results-header">
<div class="results-count" id="resultsCount">0 results</div>
<button id="collapseAllButton">Collapse All</button>
</div>
<div class="results-content" id="resultsContainer">
<div id="noResults">
Enter a search term or select filters to find classical works
</div>
</div>
</div>
</div>
<!-- Statistics Tab -->
<div id="stats-tab" class="tab-content">
<h2>Database Statistics</h2>
<div class="stats-container">
<div class="stat-box">
<div class="stat-title">Composers</div>
<div class="stat-value" id="composerCount">0</div>
</div>
<div class="stat-box">
<div class="stat-title">Works</div>
<div class="stat-value" id="workCount">0</div>
</div>
<div class="stat-box">
<div class="stat-title">Movements</div>
<div class="stat-value" id="movementCount">0</div>
</div>
<div class="stat-box">
<div class="stat-title">Time Signatures</div>
<div class="stat-value" id="timeSignatureCount">0</div>
</div>
</div>
<h3>Most Common Time Signatures</h3>
<div class="table-container">
<table id="timeSignatureTable">
<thead>
<tr>
<th>Time Signature</th>
<th>Count</th>
<th>Percentage</th>
</tr>
</thead>
<tbody>
<!-- Will be populated by JavaScript -->
</tbody>
</table>
</div>
<h3>Composers with Most Works</h3>
<div class="table-container">
<table id="composerTable">
<thead>
<tr>
<th>Composer</th>
<th>Works</th>
<th>Movements</th>
</tr>
</thead>
<tbody>
<!-- Will be populated by JavaScript -->
</tbody>
</table>
</div>
</div>
<!-- Visualization Tab -->
<div id="visualize-tab" class="tab-content">
<h2>Time Signature Visualizations</h2>
<div class="chart-container">
<h3>Distribution of Time Signatures</h3>
<div id="timeSignatureChart" class="chart"></div>
</div>
<div class="chart-container">
<h3>Time Signatures by Composer</h3>
<div class="filter-group" style="margin-bottom: 15px;">
<label for="visualizeComposerSelect">Select Composer</label>
<select id="visualizeComposerSelect">
<!-- Will be populated by JavaScript -->
</select>
</div>
<div id="composerTimeSignatureChart" class="chart"></div>
</div>
<div class="chart-container">
<h3>Time Signature Categories</h3>
<div id="timeSignatureCategoryChart" class="chart"></div>
</div>
</div>
<!-- Random Tab -->
<div id="random-tab" class="tab-content">
<h2>Random Work Generator</h2>
<p>Discover classical works by randomly selecting from the database.</p>
<div class="filters">
<div class="filter-group">
<label for="randomComposerFilter">Filter by Composer</label>
<select id="randomComposerFilter">
<option value="">Any Composer</option>
</select>
</div>
<div class="filter-group">
<label for="randomTimeSignatureFilter">Filter by Time Signature</label>
<select id="randomTimeSignatureFilter">
<option value="">Any Time Signature</option>
</select>
</div>
</div>
<button id="generateRandomButton">Generate Random Work</button>
<div class="random-container" id="randomResult" style="display: none;">
<div class="random-title" id="randomWorkTitle"></div>
<div id="randomComposer"></div>
<div class="random-details">
<ul id="randomMovements"></ul>
</div>
</div>
</div>
<!-- Advanced Tab -->
<div id="advanced-tab" class="tab-content">
<h2>Advanced Analysis</h2>
<div class="chart-container">
<h3>Time Signature Complexity by Composer</h3>
<div id="complexityChart" class="chart"></div>
</div>
<h3>Compare Time Signatures</h3>
<div class="filters">
<div class="filter-group">
<label for="compareSignature1">First Time Signature</label>
<select id="compareSignature1">
<!-- Will be populated by JavaScript -->
</select>
</div>
<div class="filter-group">
<label for="compareSignature2">Second Time Signature</label>
<select id="compareSignature2">
<!-- Will be populated by JavaScript -->
</select>
</div>
</div>
<button id="compareButton">Compare</button>
<div class="advanced-container" id="compareResults" style="display: none;">
<h4>Comparison Results</h4>
<div id="compareContent"></div>
</div>
<h3>Database JSON Preview</h3>
<p>View the current state of the loaded database.</p>
<pre id="jsonPreview">
Loading database...
</pre>
</div>
<footer>
<p>Classical Time Signature Database © 2025 | Data sourced from IMSLP and Kern Humdrum Database</p>
</footer>
</div>
<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
<script>
// Main database object
let db = {};
let filteredResults = {};
let isDataLoaded = false;
// DOM elements
const searchInput = document.getElementById('searchInput');
const searchButton = document.getElementById('searchButton');
const composerFilter = document.getElementById('composerFilter');
const timeSignatureFilter = document.getElementById('timeSignatureFilter');
const sortBySelect = document.getElementById('sortBy');
const resultsContainer = document.getElementById('resultsContainer');
const noResultsMessage = document.getElementById('noResults');
const resultsCount = document.getElementById('resultsCount');
const collapseAllButton = document.getElementById('collapseAllButton');
// Statistics elements
const composerCountElement = document.getElementById('composerCount');
const workCountElement = document.getElementById('workCount');
const movementCountElement = document.getElementById('movementCount');
const timeSignatureCountElement = document.getElementById('timeSignatureCount');
// Initialize the application
async function initializeApp() {
try {
// Fetch the JSON database
const response = await fetch('imslp_scores_corrected.json');
if (!response.ok) {
throw new Error('Failed to load database');
}
db = await response.json();
isDataLoaded = true;
// Initialize filters and stats
populateFilters();
updateStatistics();
updateVisualizationFilters();
// Preview JSON
document.getElementById('jsonPreview').textContent = JSON.stringify(db, null, 2).substring(0, 1000) + '...';
// Show search results for empty query
searchAndFilter();
} catch (error) {
console.error('Error loading database:', error);
document.getElementById('noResults').textContent = 'Error loading database. Please check that imslp_scores_corrected.json is in the same directory.';
}
}
// Populate filter dropdown options
function populateFilters() {
// Composers filter
const composers = Object.keys(db).sort();
// Clear existing options (except the first one)
while (composerFilter.options.length > 1) {
composerFilter.remove(1);
}
composers.forEach(composer => {
const option = document.createElement('option');
option.value = composer;
option.textContent = composer;
composerFilter.appendChild(option);
// Also add to random filter
const randomOption = document.createElement('option');
randomOption.value = composer;
randomOption.textContent = composer;
document.getElementById('randomComposerFilter').appendChild(randomOption);
});
// Time signatures filter
const timeSignatures = new Set();
for (const composer in db) {
for (const work in db[composer]) {
db[composer][work].forEach(movement => {
if (movement.time_signature) {
timeSignatures.add(movement.time_signature);
}
});
}
}
// Clear existing options (except the first one)
while (timeSignatureFilter.options.length > 1) {
timeSignatureFilter.remove(1);
}
Array.from(timeSignatures).sort().forEach(signature => {
const option = document.createElement('option');
option.value = signature;
option.textContent = signature;
timeSignatureFilter.appendChild(option);
// Also add to random filter
const randomOption = document.createElement('option');
randomOption.value = signature;
randomOption.textContent = signature;
document.getElementById('randomTimeSignatureFilter').appendChild(randomOption);
// Add to compare filters
const compareOption1 = document.createElement('option');
compareOption1.value = signature;
compareOption1.textContent = signature;
document.getElementById('compareSignature1').appendChild(compareOption1);
const compareOption2 = document.createElement('option');
compareOption2.value = signature;
compareOption2.textContent = signature;
document.getElementById('compareSignature2').appendChild(compareOption2);
});
}
// Update visualization filters
function updateVisualizationFilters() {
// Composer select for visualization
const visualizeComposerSelect = document.getElementById('visualizeComposerSelect');
// Clear existing options
visualizeComposerSelect.innerHTML = '';
// Add all composers option
const allOption = document.createElement('option');
allOption.value = '';
allOption.textContent = 'All Composers';
visualizeComposerSelect.appendChild(allOption);
// Add each composer
Object.keys(db).sort().forEach(composer => {
const option = document.createElement('option');
option.value = composer;
option.textContent = composer;
visualizeComposerSelect.appendChild(option);
});
// Add event listener
visualizeComposerSelect.addEventListener('change', updateComposerTimeSignatureChart);
}
// Update statistics display
function updateStatistics() {
if (!isDataLoaded) return;
const composers = Object.keys(db).length;
let works = 0;
let movements = 0;
const timeSignatures = new Set();
const timeSignatureCounts = {};
const composerStats = {};
for (const composer in db) {
const composerWorks = Object.keys(db[composer]).length;
let composerMovements = 0;
works += composerWorks;
for (const work in db[composer]) {
const movements_list = db[composer][work];
movements += movements_list.length;
composerMovements += movements_list.length;
movements_list.forEach(movement => {
if (movement.time_signature) {
timeSignatures.add(movement.time_signature);
// Count time signatures
if (timeSignatureCounts[movement.time_signature]) {
timeSignatureCounts[movement.time_signature]++;
} else {
timeSignatureCounts[movement.time_signature] = 1;
}
}
});
}
// Store composer stats
composerStats[composer] = {
works: composerWorks,
movements: composerMovements
};
}
composerCountElement.textContent = composers;
workCountElement.textContent = works;
movementCountElement.textContent = movements;
timeSignatureCountElement.textContent = timeSignatures.size;
// Update time signature table
updateTimeSignatureTable(timeSignatureCounts, movements);
// Update composer table
updateComposerTable(composerStats);
// Update visualizations
updateTimeSignatureChart(timeSignatureCounts);
updateComposerTimeSignatureChart();
updateTimeSignatureCategoryChart(timeSignatureCounts);
updateComplexityChart(composerStats);
}
// Update time signature table
function updateTimeSignatureTable(timeSignatureCounts, totalMovements) {
const tableBody = document.getElementById('timeSignatureTable').getElementsByTagName('tbody')[0];
tableBody.innerHTML = '';
// Sort time signatures by count
const sortedSignatures = Object.entries(timeSignatureCounts).sort((a, b) => b[1] - a[1]);
// Add rows for top 10 time signatures
sortedSignatures.slice(0, 10).forEach(([signature, count]) => {
const row = tableBody.insertRow();
const signatureCell = row.insertCell(0);
signatureCell.textContent = signature;
const countCell = row.insertCell(1);
countCell.textContent = count;
const percentCell = row.insertCell(2);
const percent = (count / totalMovements * 100).toFixed(1);
percentCell.textContent = `${percent}%`;
});
}
// Update composer table
function updateComposerTable(composerStats) {
const tableBody = document.getElementById('composerTable').getElementsByTagName('tbody')[0];
tableBody.innerHTML = '';
// Sort composers by number of works
const sortedComposers = Object.entries(composerStats).sort((a, b) => b[1].works - a[1].works);
// Add rows for top 10 composers
sortedComposers.slice(0, 10).forEach(([composer, stats]) => {
const row = tableBody.insertRow();
const composerCell = row.insertCell(0);
composerCell.textContent = composer;
const worksCell = row.insertCell(1);
worksCell.textContent = stats.works;
const movementsCell = row.insertCell(2);
movementsCell.textContent = stats.movements;
});
}
// Chart for time signature distribution
function updateTimeSignatureChart(timeSignatureCounts) {
const ctx = document.getElementById('timeSignatureChart');
// Sort time signatures by count
const sortedSignatures = Object.entries(timeSignatureCounts).sort((a, b) => b[1] - a[1]);
// Get top 10 time signatures
const labels = sortedSignatures.slice(0, 10).map(item => item[0]);
const data = sortedSignatures.slice(0, 10).map(item => item[1]);
// Clear previous chart if it exists
if (window.timeSignatureChart) {
window.timeSignatureChart.destroy();
}
window.timeSignatureChart = new Chart(ctx, {
type: 'bar',
data: {
labels: labels,
datasets: [{
label: 'Number of Movements',
data: data,
backgroundColor: 'rgba(0, 120, 212, 0.7)',
borderColor: 'rgba(0, 120, 212, 1)',
borderWidth: 1
}]
},
options: {
responsive: true,
maintainAspectRatio: false,
scales: {
y: {
beginAtZero: true,
title: {
display: true,
text: 'Number of Movements'
}
},
x: {
title: {
display: true,
text: 'Time Signature'
}
}
}
}
});
}
// Chart for composer time signatures
function updateComposerTimeSignatureChart() {
const ctx = document.getElementById('composerTimeSignatureChart');
const selectedComposer = document.getElementById('visualizeComposerSelect').value;
// Collect time signature data
const timeSignatureCounts = {};
if (selectedComposer) {
// Get data for the selected composer
if (db[selectedComposer]) {
for (const work in db[selectedComposer]) {
db[selectedComposer][work].forEach(movement => {
if (movement.time_signature) {
if (timeSignatureCounts[movement.time_signature]) {
timeSignatureCounts[movement.time_signature]++;
} else {
timeSignatureCounts[movement.time_signature] = 1;
}
}
});
}
}
} else {
// Get data for all composers (top 5)
for (const composer in db) {
for (const work in db[composer]) {
db[composer][work].forEach(movement => {
if (movement.time_signature) {
if (timeSignatureCounts[movement.time_signature]) {
timeSignatureCounts[movement.time_signature]++;
} else {
timeSignatureCounts[movement.time_signature] = 1;
}
}
});
}
}
}
// Sort time signatures by count
const sortedSignatures = Object.entries(timeSignatureCounts).sort((a, b) => b[1] - a[1]);
// Get top 8 time signatures
const labels = sortedSignatures.slice(0, 8).map(item => item[0]);
const data = sortedSignatures.slice(0, 8).map(item => item[1]);
// Clear previous chart if it exists
if (window.composerTimeSignatureChart) {
window.composerTimeSignatureChart.destroy();
}
window.composerTimeSignatureChart = new Chart(ctx, {
type: 'pie',
data: {
labels: labels,
datasets: [{
data: data,
backgroundColor: [
'rgba(255, 99, 132, 0.7)',
'rgba(54, 162, 235, 0.7)',
'rgba(255, 206, 86, 0.7)',
'rgba(75, 192, 192, 0.7)',
'rgba(153, 102, 255, 0.7)',
'rgba(255, 159, 64, 0.7)',
'rgba(199, 199, 199, 0.7)',
'rgba(83, 102, 255, 0.7)'
],
borderColor: [
'rgba(255, 99, 132, 1)',
'rgba(54, 162, 235, 1)',
'rgba(255, 206, 86, 1)',
'rgba(75, 192, 192, 1)',
'rgba(153, 102, 255, 1)',
'rgba(255, 159, 64, 1)',
'rgba(199, 199, 199, 1)',
'rgba(83, 102, 255, 1)'
],
borderWidth: 1
}]
},
options: {
responsive: true,
maintainAspectRatio: false,
plugins: {
title: {
display: true,
text: selectedComposer ? `Time Signatures Used by ${selectedComposer}` : 'Most Common Time Signatures Overall'
},
legend: {
position: 'right'
}