{"id":2650,"date":"2026-01-10T07:10:31","date_gmt":"2026-01-10T15:10:31","guid":{"rendered":"https:\/\/stereodaily.com\/?page_id=2650"},"modified":"2026-01-10T07:12:15","modified_gmt":"2026-01-10T15:12:15","slug":"chord-progression-generator","status":"publish","type":"page","link":"https:\/\/stereodaily.com\/ja\/chord-progression-generator\/","title":{"rendered":"Chord Progression Generator"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"2650\" class=\"elementor elementor-2650\">\n\t\t\t\t<div class=\"elementor-element elementor-element-122e935 e-flex e-con-boxed e-con e-parent\" data-id=\"122e935\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-e072e8d elementor-widget elementor-widget-html\" data-id=\"e072e8d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<!-- \r\n    ##########################################################################\r\n    \u2605 WIDGET: CHORD PROGRESSION GENERATOR \u2605\r\n    TYPE: HTML (Optimized for Mobile, Tablet, PC)\r\n    DESIGN: BOLD EDITORIAL \/ BRUTALIST\r\n    ##########################################################################\r\n-->\r\n\r\n<!-- Tailwind & Fonts -->\r\n<script src=\"https:\/\/cdn.tailwindcss.com\"><\/script>\r\n<link href=\"https:\/\/fonts.googleapis.com\/css2?family=Inter:wght@400;600;700;900&family=Playfair+Display:ital,wght@0,400;0,700;0,900;1,400;1,900&family=Archivo+Narrow:wght@400;700&display=swap\" rel=\"stylesheet\">\r\n\r\n<style>\r\n    :root {\r\n        --sd-black: #000000;\r\n        --sd-gray-light: #f9f9f9;\r\n        --sd-border: #000000;\r\n    }\r\n\r\n    .sd-widget { \r\n        font-family: 'Inter', sans-serif; \r\n        background-color: #fff; \r\n        color: #000; \r\n        text-rendering: optimizeLegibility;\r\n        -webkit-font-smoothing: antialiased;\r\n    }\r\n    \r\n    .font-masthead { font-family: 'Playfair Display', serif; }\r\n    .font-body { font-family: 'Inter', sans-serif; }\r\n    .font-narrow { font-family: 'Archivo Narrow', sans-serif; }\r\n\r\n    .chord-card {\r\n        transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);\r\n    }\r\n    .chord-card:hover {\r\n        transform: translateY(-4px);\r\n    }\r\n\r\n    .generate-btn {\r\n        transition: all 0.2s ease;\r\n    }\r\n    .generate-btn:active {\r\n        transform: scale(0.98);\r\n        background-color: #1a1a1a;\r\n    }\r\n    \r\n    select {\r\n        background-image: none !important; \/* Remove default arrow to use custom SVG *\/\r\n    }\r\n<\/style>\r\n\r\n<div class=\"sd-widget max-w-[1280px] mx-auto border-x border-gray-200 min-h-screen\">\r\n    \r\n    <!-- Header Section -->\r\n    <div class=\"px-6 py-12 md:py-20 border-b-4 border-black text-center relative\">\r\n        <div class=\"font-body text-xs font-bold uppercase tracking-[0.4em] text-gray-400 mb-4\">The <a href=\"https:\/\/stereodaily.com\/ja\/what-is-stereo-daily-inside-the-modern-music-journalism-platform\/\">Stereo Daily<\/a> Intelligence<\/div>\r\n        <h1 class=\"font-masthead text-5xl sm:text-6xl md:text-8xl font-black tracking-tighter text-black mb-6 leading-[0.9]\">\r\n            Theory Engine.\r\n        <\/h1>\r\n        \r\n        <div class=\"max-w-2xl mx-auto border-t border-black pt-8\">\r\n            <div class=\"font-body text-lg md:text-xl text-gray-600 leading-relaxed italic px-4\">\r\n                The architecture of melody. Generating harmonically safe progressions through music theory probability and functional chord analysis.\r\n            <\/div>\r\n        <\/div>\r\n    <\/div>\r\n\r\n    <div class=\"grid grid-cols-1 lg:grid-cols-12 gap-0 border-b border-gray-200\">\r\n        \r\n        <!-- Left: Simulator Controls -->\r\n        <div class=\"lg:col-span-5 border-r border-gray-200 p-6 md:p-12\">\r\n            <div class=\"mb-12\">\r\n                <label class=\"font-narrow text-xs font-black uppercase tracking-widest text-gray-400 block mb-4\">Configuration<\/label>\r\n                <div class=\"space-y-8\">\r\n                    <div class=\"grid grid-cols-2 gap-4\">\r\n                        <div>\r\n                            <span class=\"text-[10px] font-bold uppercase mb-2 block\">Root Key<\/span>\r\n                            <div class=\"border-2 border-black relative h-[68px] flex items-center\">\r\n                                <select id=\"key-select\" class=\"w-full bg-white pl-4 pr-10 py-1 font-masthead text-3xl font-black italic focus:outline-none appearance-none cursor-pointer\">\r\n                                    <option value=\"C\">C<\/option>\r\n                                    <option value=\"G\">G<\/option>\r\n                                    <option value=\"D\">D<\/option>\r\n                                    <option value=\"A\">A<\/option>\r\n                                    <option value=\"E\">E<\/option>\r\n                                    <option value=\"F\">F<\/option>\r\n                                    <option value=\"Bb\">Bb<\/option>\r\n                                <\/select>\r\n                                <div class=\"pointer-events-none absolute inset-y-0 right-0 flex items-center px-4 text-black\">\r\n                                    <svg class=\"h-4 w-4\" fill=\"none\" stroke=\"currentColor\" viewBox=\"0 0 24 24\" stroke-width=\"4\">\r\n                                        <path d=\"M19 9l-7 7-7-7\"><\/path>\r\n                                    <\/svg>\r\n                                <\/div>\r\n                            <\/div>\r\n                        <\/div>\r\n                        <div>\r\n                            <span class=\"text-[10px] font-bold uppercase mb-2 block\">Scale Mode<\/span>\r\n                            <div class=\"border-2 border-black relative h-[68px] flex items-center\">\r\n                                <select id=\"mode-select\" class=\"w-full bg-white pl-4 pr-10 py-1 font-masthead text-3xl font-black italic focus:outline-none appearance-none cursor-pointer\">\r\n                                    <option value=\"major\">Major<\/option>\r\n                                    <option value=\"minor\">Minor<\/option>\r\n                                <\/select>\r\n                                <div class=\"pointer-events-none absolute inset-y-0 right-0 flex items-center px-4 text-black\">\r\n                                    <svg class=\"h-4 w-4\" fill=\"none\" stroke=\"currentColor\" viewBox=\"0 0 24 24\" stroke-width=\"4\">\r\n                                        <path d=\"M19 9l-7 7-7-7\"><\/path>\r\n                                    <\/svg>\r\n                                <\/div>\r\n                            <\/div>\r\n                        <\/div>\r\n                    <\/div>\r\n                    \r\n                    <button id=\"generate-trigger\" class=\"generate-btn w-full bg-black text-white py-6 font-narrow text-sm font-black uppercase tracking-[0.3em] hover:bg-gray-900 focus:outline-none\">\r\n                        Generate Progression\r\n                    <\/button>\r\n                <\/div>\r\n            <\/div>\r\n\r\n            <div class=\"bg-gray-50 p-6 border-l-4 border-black\">\r\n                <h3 class=\"font-masthead text-2xl font-black italic mb-2 tracking-tighter\">Theory Note.<\/h3>\r\n                <p id=\"theory-note-text\" class=\"text-[11px] font-body leading-relaxed uppercase font-bold tracking-tight opacity-70\">\r\n                    This engine prioritizes Diatonic harmony. It selects from I, ii, iii, IV, V, and vi degrees, weighted toward standard cadences (V-I) and popular Western pop movements.\r\n                <\/p>\r\n            <\/div>\r\n        <\/div>\r\n\r\n        <!-- Right: Results Panel -->\r\n        <div class=\"lg:col-span-7 bg-black text-white p-6 md:p-12 flex flex-col justify-between overflow-hidden\">\r\n            <div>\r\n                <div class=\"text-xs font-bold uppercase tracking-[0.3em] text-gray-500 mb-12\">Harmonic Output<\/div>\r\n                \r\n                <div id=\"progression-display\" class=\"grid grid-cols-2 md:grid-cols-4 gap-4 mb-16\">\r\n                    <!-- Chords injected here -->\r\n                <\/div>\r\n\r\n                <div class=\"mb-16\">\r\n                    <div class=\"text-[10px] font-black uppercase tracking-widest text-gray-400 mb-2\">Roman Numeral Analysis<\/div>\r\n                    <div id=\"analysis-display\" class=\"font-masthead text-4xl md:text-5xl font-black italic tracking-tighter leading-none border-b-4 border-white pb-4 inline-block\">\r\n                        I \u2014 V \u2014 vi \u2014 IV\r\n                    <\/div>\r\n                <\/div>\r\n            <\/div>\r\n\r\n            <div class=\"bg-white text-black p-6\">\r\n                <div class=\"text-xs font-black uppercase tracking-widest mb-1\">Functional Context<\/div>\r\n                <div id=\"context-display\" class=\"font-masthead text-xl font-black italic tracking-tighter uppercase\">\r\n                    The \"Epic\" Pop Progression.\r\n                <\/div>\r\n            <\/div>\r\n        <\/div>\r\n    <\/div>\r\n\r\n    <!-- START WIDGET 5.3 (ELEMENTOR\/MAILCHIMP) ADAPTATION -->\r\n    <div id=\"mc_embed_signup\" class=\"bg-[#fdfdfd] w-full\">\r\n        <link href=\"https:\/\/fonts.googleapis.com\/css2?family=Playfair+Display:ital,wght@0,900;1,900&family=Archivo+Narrow:wght@400;700&display=swap\" rel=\"stylesheet\">\r\n        \r\n        <div class=\"px-0 pb-6\">\r\n            <div class=\"mb-0 border-[6px] border-black py-10 bg-white w-full\">\r\n                <div class=\"flex flex-col md:flex-row items-center justify-between px-10 gap-8\">\r\n                    \r\n                    <div class=\"text-center md:text-left flex-shrink-0\">\r\n                        <h4 class=\"text-4xl md:text-5xl mb-1 tracking-tight leading-none\" style=\"font-family: 'Playfair Display', serif; font-weight: 900;\">\r\n                            Stereo Daily.\r\n                        <\/h4>\r\n                        <p class=\"text-[11px] uppercase tracking-[0.2em] font-bold text-black\" style=\"font-family: 'Archivo Narrow', sans-serif;\">\r\n                            <a href=\"https:\/\/stereodaily.com\/ja\/music-finance-stocks\/\">Music News<\/a> & Industry Whispers\r\n                        <\/p>\r\n                    <\/div>\r\n\r\n                    <div class=\"flex-grow w-full max-w-2xl\">\r\n                        <form action=\"https:\/\/gmail.us14.list-manage.com\/subscribe\/post?u=ea67674782cf60158e68c325b&amp;id=66c61347a8\" method=\"post\" id=\"mc-embedded-subscribe-form\" name=\"mc-embedded-subscribe-form\" class=\"flex flex-col sm:flex-row gap-0 w-full border-2 border-black\" target=\"_blank\" novalidate>\r\n                            \r\n                            <div class=\"flex-grow\">\r\n                                <input \r\n                                    type=\"email\" \r\n                                    value=\"\" \r\n                                    name=\"EMAIL\" \r\n                                    id=\"mce-EMAIL\"\r\n                                    placeholder=\"Enter Your Email\" \r\n                                    required\r\n                                    class=\"w-full bg-white px-5 py-4 text-[10px] font-bold tracking-widest focus:outline-none placeholder:text-gray-400\"\r\n                                    style=\"font-family: 'Archivo Narrow', sans-serif;\"\r\n                                \/>\r\n                            <\/div>\r\n\r\n                            <div style=\"position: absolute; left: -5000px;\" aria-hidden=\"true\">\r\n                                <input type=\"text\" name=\"b_ea67674782cf60158e68c325b_68124561f80241ac1200140b3\" tabindex=\"-1\" value=\"\">\r\n                            <\/div>\r\n\r\n                            <div class=\"flex-shrink-0\">\r\n                                <button type=\"submit\" name=\"subscribe\" id=\"mc-embedded-subscribe\" class=\"w-full sm:w-auto px-10 bg-black text-white text-[10px] font-black uppercase tracking-[0.3em] py-4 hover:bg-gray-800 transition-colors cursor-pointer\" style=\"font-family: 'Archivo Narrow', sans-serif;\">\r\n                                    JOIN\r\n                                <\/button>\r\n                            <\/div>\r\n                        <\/form>\r\n                        <div class=\"flex flex-col md:flex-row justify-between mt-3 opacity-60\">\r\n                            <p class=\"text-[9px] font-bold uppercase tracking-widest text-center md:text-left\" style=\"font-family: 'Archivo Narrow', sans-serif;\">\r\n                                40,000+ IN THE FOLD\r\n                            <\/p>\r\n                            <p class=\"text-[9px] font-bold uppercase tracking-widest text-center md:text-right\" style=\"font-family: 'Archivo Narrow', sans-serif;\">\r\n                                \u00a9 STEREO MAGAZINE\r\n                            <\/p>\r\n                        <\/div>\r\n                    <\/div>\r\n\r\n                <\/div>\r\n            <\/div>\r\n        <\/div>\r\n    <\/div>\r\n    <!-- END WIDGET 5.3 -->\r\n\r\n<\/div>\r\n\r\n<script>\r\n(function() {\r\n    const keySelect = document.getElementById('key-select');\r\n    const modeSelect = document.getElementById('mode-select');\r\n    const generateBtn = document.getElementById('generate-trigger');\r\n    const displayContainer = document.getElementById('progression-display');\r\n    const analysisDisplay = document.getElementById('analysis-display');\r\n    const contextDisplay = document.getElementById('context-display');\r\n    const theoryNoteText = document.getElementById('theory-note-text');\r\n\r\n    const scales = {\r\n        major: {\r\n            'C': ['C', 'Dm', 'Em', 'F', 'G', 'Am', 'Bdim'],\r\n            'G': ['G', 'Am', 'Bm', 'C', 'D', 'Em', 'F#dim'],\r\n            'D': ['D', 'Em', 'F#m', 'G', 'A', 'Bm', 'C#dim'],\r\n            'A': ['A', 'Bm', 'C#m', 'D', 'E', 'F#m', 'G#dim'],\r\n            'E': ['E', 'F#m', 'G#m', 'A', 'B', 'C#m', 'D#dim'],\r\n            'F': ['F', 'Gm', 'Am', 'Bb', 'C', 'Dm', 'Edim'],\r\n            'Bb': ['Bb', 'Cm', 'Dm', 'Eb', 'F', 'Gm', 'Adim']\r\n        },\r\n        minor: {\r\n            'C': ['Cm', 'Ddim', 'Eb', 'Fm', 'Gm', 'Ab', 'Bb'],\r\n            'G': ['Gm', 'Adim', 'Bb', 'Cm', 'Dm', 'Eb', 'F'],\r\n            'D': ['Dm', 'Edim', 'F', 'Gm', 'Am', 'Bb', 'C'],\r\n            'A': ['Am', 'Bdim', 'C', 'Dm', 'Em', 'F', 'G'],\r\n            'E': ['Em', 'F#dim', 'G', 'Am', 'Bm', 'C', 'D'],\r\n            'F': ['Fm', 'Gdim', 'Ab', 'Bbm', 'Cm', 'Db', 'Eb'],\r\n            'Bb': ['Bbm', 'Cdim', 'Db', 'Ebm', 'Fm', 'Gb', 'Ab']\r\n        }\r\n    };\r\n\r\n    const numerals = {\r\n        major: ['I', 'ii', 'iii', 'IV', 'V', 'vi', 'vii\u00b0'],\r\n        minor: ['i', 'ii\u00b0', 'III', 'iv', 'v', 'VI', 'VII']\r\n    };\r\n\r\n    const templates = {\r\n        major: [\r\n            { sequence: [0, 4, 5, 3], name: \"The 'Epic' Pop Progression\" }, \/\/ I-V-vi-IV\r\n            { sequence: [0, 3, 0, 4], name: \"The Bluesy Rock Turn\" },      \/\/ I-IV-I-V\r\n            { sequence: [5, 3, 0, 4], name: \"Emotional Descent\" },         \/\/ vi-IV-I-V\r\n            { sequence: [0, 3, 4, 3], name: \"Plagal Confidence\" },         \/\/ I-IV-V-IV\r\n            { sequence: [1, 4, 0, 0], name: \"The Standard Jazz II-V-I\" },  \/\/ ii-V-I-I\r\n            { sequence: [0, 5, 1, 4], name: \"Soft Melancholy\" }            \/\/ I-vi-ii-V\r\n        ],\r\n        minor: [\r\n            { sequence: [0, 5, 2, 6], name: \"The 'Sensitive' Minor\" },     \/\/ i-VI-III-VII\r\n            { sequence: [0, 3, 4, 0], name: \"Traditional Minor Cadence\" }, \/\/ i-iv-v-i\r\n            { sequence: [0, 6, 5, 6], name: \"Andalusian Movement\" },      \/\/ i-VII-VI-VII\r\n            { sequence: [0, 5, 6, 4], name: \"The Dark Pop Loop\" },         \/\/ i-VI-VII-v\r\n            { sequence: [1, 4, 0, 0], name: \"Minor II-V-I Turn\" },         \/\/ ii\u00b0-v-i-i\r\n            { sequence: [0, 3, 5, 6], name: \"Melodic Gravity\" }            \/\/ i-iv-VI-VII\r\n        ]\r\n    };\r\n\r\n    const generate = () => {\r\n        const key = keySelect.value;\r\n        const mode = modeSelect.value;\r\n        const scale = scales[mode][key];\r\n        const roman = numerals[mode];\r\n        const modeTemplates = templates[mode];\r\n        \r\n        \/\/ Pick a template based on probability\r\n        const template = modeTemplates[Math.floor(Math.random() * modeTemplates.length)];\r\n        \r\n        \/\/ Update Theory Note\r\n        if (mode === 'major') {\r\n            theoryNoteText.textContent = \"This engine prioritizes Diatonic harmony. It selects from I, ii, iii, IV, V, and vi degrees, weighted toward standard cadences (V-I) and popular Western pop movements.\";\r\n        } else {\r\n            theoryNoteText.textContent = \"Minor mode utilizes Natural Minor relationships. It emphasizes the 'Sensitive' i-VI-III-VII loop and traditional i-iv-v cadences common in soul and dark pop.\";\r\n        }\r\n\r\n        \/\/ Render Visuals\r\n        displayContainer.innerHTML = template.sequence.map(index => `\r\n            <div class=\"chord-card bg-white text-black p-6 border-2 border-white flex flex-col items-center justify-center\">\r\n                <div class=\"font-masthead text-4xl font-black italic\">${scale[index]}<\/div>\r\n                <div class=\"text-[10px] font-black uppercase tracking-widest opacity-30 mt-2\">${roman[index]}<\/div>\r\n            <\/div>\r\n        `).join('');\r\n\r\n        analysisDisplay.textContent = template.sequence.map(i => roman[i]).join(' \u2014 ');\r\n        contextDisplay.textContent = template.name + '.';\r\n    };\r\n\r\n    generateBtn.addEventListener('click', generate);\r\n    keySelect.addEventListener('change', generate);\r\n    modeSelect.addEventListener('change', generate);\r\n\r\n    \/\/ Initial run\r\n    generate();\r\n})();\r\n<\/script>\r\n\r\n<!-- Mailchimp Connected Script -->\r\n<script id=\"mcjs\">\r\n    !function(c,h,i,m,p){m=c.createElement(h),p=c.getElementsByTagName(h)[0],m.async=1,m.src=i,p.parentNode.insertBefore(m,p)}(document,\"script\",\"https:\/\/chimpstatic.com\/mcjs-connected\/js\/users\/ea67674782cf60158e68c325b\/68124561f80241ac1200140b3.js\");\r\n<\/script>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>The Stereo Daily Intelligence Theory Engine. The architecture of melody. 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