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		<title>G7 Blues Backing Track: 12-Bar Swing Blues in G (94 BPM)</title>
		<link>https://www.cantonmusicacademy.com/g7-blues-backing-track/</link>
		
		<dc:creator><![CDATA[Canton Music Academy]]></dc:creator>
		<pubDate>Thu, 31 Jul 2025 12:47:54 +0000</pubDate>
				<category><![CDATA[Guitar]]></category>
		<category><![CDATA[Music Education]]></category>
		<category><![CDATA[music education]]></category>
		<guid isPermaLink="false">https://www.cantonmusicacademy.com/?p=1716</guid>

					<description><![CDATA[<p>The 12-bar blues is one of the most important progressions in music, and it&#8217;s the best place to learn to improvise. Press play and jam along with our free G7 blues backing track: a relaxed swing blues in G at 94 BPM, made for Canton Music Academy students and teachers. KeyG Tempo94 BPM FeelSwing Form12-bar...</p>
<p>The post <a href="https://www.cantonmusicacademy.com/g7-blues-backing-track/">G7 Blues Backing Track: 12-Bar Swing Blues in G (94 BPM)</a> appeared first on <a href="https://www.cantonmusicacademy.com">Canton Music Academy</a>.</p>
]]></description>
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<p class="lead">The 12-bar blues is one of the most important progressions in music, and it&#8217;s the best place to learn to improvise. Press play and jam along with our free G7 blues backing track: a relaxed swing blues in G at 94 BPM, made for Canton Music Academy students and teachers.</p>

<div class="vid">
  <iframe src="https://www.youtube.com/embed/GH13hZW-pEg" title="G7 Blues Backing Track: 12 Bar Swing Blues in G, 94 BPM" loading="lazy" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
</div>

<div class="facts">
  <div><small>Key</small><b>G</b></div>
  <div><small>Tempo</small><b>94 BPM</b></div>
  <div><small>Feel</small><b>Swing</b></div>
  <div><small>Form</small><b>12-bar</b></div>
</div>

<h2>G7 Blues Chord Chart</h2>
<p>The track uses three dominant 7th chords, the I, IV and V of G: <b>G7, C7 and D7</b>. Count four beats per bar and follow along:</p>
<div class="chart" role="table" aria-label="12-bar blues in G chord chart">
  <div class="i"><small>1</small>G7</div><div class="i"><small>2</small>G7</div><div class="i"><small>3</small>G7</div><div class="i"><small>4</small>G7</div>
  <div class="iv"><small>5</small>C7</div><div class="iv"><small>6</small>C7</div><div class="i"><small>7</small>G7</div><div class="i"><small>8</small>G7</div>
  <div class="v"><small>9</small>D7</div><div class="iv"><small>10</small>C7</div><div class="i"><small>11</small>G7</div><div class="v"><small>12</small>D7</div>
</div>
<div class="key"><span class="k1">I chord (G7)</span><span class="k4">IV chord (C7)</span><span class="k5">V chord (D7)</span></div>
<p>Bar 12 on the D7 is the &#8220;turnaround.&#8221; It pulls you back to the top of the form, and the progression loops so you can keep playing.</p>

<h3>Chord tones</h3>
<div class="tones">
  <div><b>G7</b><span>G · B · D · F</span></div>
  <div><b>C7</b><span>C · E · G · B♭</span></div>
  <div><b>D7</b><span>D · F♯ · A · C</span></div>
</div>
<p>Landing a solo phrase on a chord tone of whichever chord is playing is one of the fastest ways to sound &#8220;inside&#8221; the changes.</p>

<h2>Best Scales to Solo Over a G Blues</h2>
<div class="scales">
  <div class="sc"><b>G minor pentatonic</b><div class="notes"><i>G</i><i>B♭</i><i>C</i><i>D</i><i>F</i></div><p>The classic blues-rock sound. Start here if you&#8217;re new to soloing. See our <a href="https://www.cantonmusicacademy.com/minor-pentatonic-scales/">minor pentatonic guide</a>.</p></div>
  <div class="sc"><b>G blues scale</b><div class="notes"><i>G</i><i>B♭</i><i>C</i><i class="blue">D♭</i><i>D</i><i>F</i></div><p>Minor pentatonic plus the &#8220;blue note&#8221; (D♭). Slide through it rather than landing on it.</p></div>
  <div class="sc"><b>G major pentatonic</b><div class="notes"><i>G</i><i>A</i><i>B</i><i>D</i><i>E</i></div><p>A brighter, sweeter sound, great for country-blues and B.B. King style phrases.</p></div>
  <div class="sc"><b>G Mixolydian</b><div class="notes"><i>G</i><i>A</i><i>B</i><i>C</i><i>D</i><i>E</i><i>F</i></div><p>The full scale behind a G7 chord, for jazzier lines. Learn more in <a href="https://www.cantonmusicacademy.com/why-should-i-learn-modes/">why learn modes</a>.</p></div>
</div>
<p>Try mixing the minor and major pentatonic: B♭ bent up toward B is one of the most classic blues moves there is.</p>

<h2>Why the 12-Bar Blues Matters</h2>
<p>The 12-bar blues isn&#8217;t just for blues. It&#8217;s the foundation of countless rock, jazz, pop and country songs. Practicing over it builds:</p>
<ul class="wp-block-list">
  <li>Steady rhythm and smooth chord changes</li>
  <li>A feel for song form, so you always know where you are</li>
  <li>Confidence improvising and soloing</li>
  <li>Ear training through repetition and feel</li>
</ul>

<h2>How to Use This Backing Track</h2>
<div class="two">
  <div class="col">
    <h3>🎸 For students</h3>
    <ul>
      <li>Strum or play a shuffle rhythm with the chords first</li>
      <li>Play the G minor pentatonic up and down in time</li>
      <li>Add bends, slides and short 2–4 note phrases</li>
      <li>Leave space: rests are part of a great solo</li>
    </ul>
  </div>
  <div class="col">
    <h3>🍎 For teachers</h3>
    <ul>
      <li>Use it as a warm-up or mid-lesson jam</li>
      <li>Trade call-and-response licks with your student</li>
      <li>Have students call out bar numbers as the form goes by</li>
      <li>Assign a scale position or technique to practice at home with the video</li>
    </ul>
  </div>
</div>

<h2>More Blues Backing Tracks</h2>
<p>We&#8217;re adding more keys, tempos and grooves to our 12-bar blues playlist. Subscribe so you don&#8217;t miss new tracks.</p>
<p><a class="yt" href="https://www.youtube.com/playlist?list=PL_IVaeJR0Mnn46HlTSHrimLDRXfrY5cU3" target="_blank" rel="noopener"><span aria-hidden="true">▶</span> 12-Bar Blues Backing Tracks playlist</a></p>
<p>Want the theory behind it all? Visit our <a href="https://www.cantonmusicacademy.com/guitar-music-theory-guide/">Guitar Music Theory Guide</a> for scales, chords and more.</p>

<div class="call">
  <p><b>Ready to really learn the blues?</b>Private guitar lessons in Canton for every level, from first chords to full solos.</p>
  <a class="btn" href="https://www.cantonmusicacademy.com/guitar-lessons-in-canton-mi/">Explore Guitar Lessons</a>
</div>

</div>
<p>The post <a href="https://www.cantonmusicacademy.com/g7-blues-backing-track/">G7 Blues Backing Track: 12-Bar Swing Blues in G (94 BPM)</a> appeared first on <a href="https://www.cantonmusicacademy.com">Canton Music Academy</a>.</p>
]]></content:encoded>
					
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">1716</post-id>	</item>
		<item>
		<title>How to Read and Use a Circle of Fifths Chart for Music Theory Success</title>
		<link>https://www.cantonmusicacademy.com/circle-of-fifths-chart/</link>
		
		<dc:creator><![CDATA[Canton Music Academy]]></dc:creator>
		<pubDate>Mon, 14 Jul 2025 20:35:29 +0000</pubDate>
				<category><![CDATA[Music Education]]></category>
		<category><![CDATA[Music Theory]]></category>
		<guid isPermaLink="false">https://www.cantonmusicacademy.com/?p=1650</guid>

					<description><![CDATA[<p>The circle of fifths is a map of every key in music. Tap any key below to see its key signature, its relative major or minor, its closest neighbors and the chords that belong to it, and hear how they sound. Loading the circle of fifths… What Is a Circle of Fifths Chart? A circle...</p>
<p>The post <a href="https://www.cantonmusicacademy.com/circle-of-fifths-chart/">How to Read and Use a Circle of Fifths Chart for Music Theory Success</a> appeared first on <a href="https://www.cantonmusicacademy.com">Canton Music Academy</a>.</p>
]]></description>
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<p class="cmx-lead">The circle of fifths is a map of every key in music. Tap any key below to see its key signature, its relative major or minor, its closest neighbors and the chords that belong to it, and hear how they sound.</p>

<div class="cmx-tool" id="cmx-cof"><p style="color:#4a5568;text-align:center;padding:30px 0">Loading the circle of fifths…</p></div>

<h2>What Is a Circle of Fifths Chart?</h2>
<p>A circle of fifths chart arranges the 12 keys of Western music in a circle, with each key a perfect fifth away from the next. It&#8217;s one of the most useful visual aids in music theory, giving you a quick reference for:</p>
<ul class="wp-block-list">
  <li>Key signatures (sharps and flats)</li>
  <li>Relative major and minor keys</li>
  <li>Harmonic relationships between keys</li>
  <li>Chord progression possibilities</li>
  <li>Transposing between keys</li>
</ul>
<p>Moving clockwise adds one sharp at a time (C, G, D, A, E, B, F♯), and moving counterclockwise adds one flat at a time (F, B♭, E♭, A♭, D♭, G♭). C major and A minor sit at the top because they have no sharps or flats. At the bottom, three keys have two names that sound the same, like F♯ and G♭.</p>

<h2>How to Read the Circle</h2>
<p><b>Outer ring:</b> major keys. <b>Inner ring:</b> each major key&#8217;s relative minor, which shares the same key signature. <b>Center numbers:</b> how many sharps or flats that key signature has.</p>
<p>The keys on either side of any key are its closest relatives. In C major, F is on one side (the IV chord) and G is on the other (the V chord). Together with their relative minors, those six keys are the ones music most often moves between, and the interactive chart highlights them for whichever key you choose.</p>

<h2>Practical Uses for a Circle of Fifths Chart</h2>
<figure class="wp-block-table"><table><thead><tr><th>Purpose</th><th>How it helps</th></tr></thead><tbody>
<tr><td>Identify key signatures</td><td>Quickly see the sharps or flats in any key</td></tr>
<tr><td>Understand harmony</td><td>Learn which chords naturally fit together</td></tr>
<tr><td>Transpose songs</td><td>Move music to a new key with confidence</td></tr>
<tr><td>Compose music</td><td>Find related keys for smooth key changes</td></tr>
<tr><td>Improvise</td><td>Build progressions from chords in the same key</td></tr>
</tbody></table></figure>

<h2>Why Visual Learners Love the Circle of Fifths</h2>
<p>Music theory can feel abstract when it&#8217;s only explained in words or memorized by rote. The circle of fifths turns key relationships into a picture you can see, and hearing the chords makes it stick. At Canton Music Academy we use it in lessons to help students break down songs, understand scales and intervals, and build theory knowledge that lasts.</p>

<h2>Download Your Free Printable Circle of Fifths Chart</h2>
<p>Want a copy for your practice space or lesson binder? Our clean, easy-to-read circle of fifths PDF highlights C major and A minor and labels the scale degrees, so it&#8217;s great for students, teachers and musicians alike.</p>
<p><a class="cmx-btn gold" href="https://www.cantonmusicacademy.com/wp-content/uploads/2025/07/circle-of-5ths.pdf" target="_blank" rel="noopener">⬇ Download the free circle of fifths PDF</a></p>

<h2>Circle of Fifths FAQ</h2>
<details><summary>Why is it called the circle of fifths?</summary><p>Because each key is a perfect fifth above the one before it as you move clockwise. After 12 steps you arrive back where you started, completing the circle.</p></details>
<details><summary>Does the circle of fifths apply to all instruments?</summary><p>Yes. Piano, guitar, brass, woodwinds and voice all use the same keys, so the chart works for any instrument.</p></details>
<details><summary>How is this different from a key signature chart?</summary><p>A key signature chart lists the sharps or flats in each key. The circle of fifths also shows how keys relate to each other, which makes it more useful for harmony, songwriting and transposing.</p></details>
<details><summary>What is a relative minor?</summary><p>Every major key has a relative minor that uses the same notes and key signature. It starts on the 6th note of the major scale; for example, the relative minor of C major is A minor.</p></details>
<details><summary>Is this suitable for beginners?</summary><p>Absolutely. Start by learning the order of sharps and flats, then use the chart to find the chords in songs you&#8217;re learning.</p></details>
<details><summary>Can I use this in my music classroom?</summary><p>Of course. Teachers are welcome to print the PDF and share this page with students.</p></details>

<p>Ready to put keys and chords together? Build and print your own progressions with our free <a href="https://www.cantonmusicacademy.com/chord-progression-builder/">Chord Progression Builder</a>, look up any chord with the <a href="https://www.cantonmusicacademy.com/chord-calculator/">Chord Spelling Calculator</a>, or work with a teacher in our <a href="https://www.cantonmusicacademy.com/music-lessons-in-canton-mi/">music lessons in Canton</a>.</p>

</div>
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  /* treble clef outline (Bravura, SIL OFL) in font units: origin on the G line, 250 units per staff space */
  var GCLEF = 'M541.0 -598.0C539.0 -615.0 541.0 -616.0 550.0 -625.0C706.0 -770.0 824.0 -953.0 824.0 -1174.0C824.0 -1299.0 789.0 -1423.0 730.0 -1509.0C708.0 -1541.0 671.0 -1581.0 655.0 -1581.0C635.0 -1581.0 590.0 -1544.0 562.0 -1512.0C455.0 -1394.0 420.0 -1214.0 420.0 -1064.0C420.0 -981.0 431.0 -887.0 441.0 -828.0C444.0 -811.0 445.0 -808.0 428.0 -793.0C220.0 -622.0 0.0 -416.0 0.0 -125.0C0.0 125.0 171.0 363.0 524.0 363.0C557.0 363.0 595.0 360.0 624.0 354.0C639.0 351.0 642.0 350.0 645.0 367.0C662.0 464.0 684.0 589.0 684.0 657.0C684.0 870.0 540.0 896.0 455.0 896.0C377.0 896.0 340.0 873.0 340.0 854.0C340.0 844.0 353.0 840.0 386.0 829.0C431.0 816.0 482.0 778.0 482.0 694.0C482.0 615.0 432.0 547.0 344.0 547.0C248.0 547.0 190.0 624.0 190.0 713.0C190.0 806.0 246.0 948.0 464.0 948.0C560.0 948.0 747.0 904.0 747.0 660.0C747.0 577.0 721.0 441.0 706.0 351.0C703.0 334.0 704.0 336.0 724.0 327.0C870.0 269.0 966.0 147.0 966.0 -16.0C966.0 -200.0 831.0 -363.0 619.0 -363.0C582.0 -363.0 582.0 -363.0 577.0 -389.0ZM677.0 -1358.0C724.0 -1358.0 763.0 -1319.0 763.0 -1240.0C763.0 -1080.0 626.0 -950.0 513.0 -851.0C503.0 -842.0 497.0 -844.0 494.0 -863.0C488.0 -900.0 485.0 -949.0 485.0 -995.0C485.0 -1220.0 589.0 -1358.0 677.0 -1358.0ZM520.0 -377.0C524.0 -350.0 524.0 -351.0 498.0 -343.0C372.0 -300.0 289.0 -186.0 289.0 -63.0C289.0 66.0 357.0 158.0 455.0 192.0C467.0 196.0 484.0 200.0 494.0 200.0C505.0 200.0 511.0 193.0 511.0 184.0C511.0 174.0 500.0 170.0 490.0 166.0C429.0 140.0 386.0 78.0 386.0 12.0C386.0 -71.0 442.0 -132.0 530.0 -157.0C553.0 -163.0 556.0 -161.0 559.0 -145.0L631.0 284.0C634.0 300.0 632.0 300.0 611.0 304.0C588.0 308.0 559.0 311.0 530.0 311.0C278.0 311.0 115.0 171.0 115.0 -29.0C115.0 -114.0 130.0 -228.0 249.0 -363.0C336.0 -459.0 402.0 -513.0 469.0 -567.0C484.0 -579.0 487.0 -577.0 490.0 -562.0ZM619.0 -148.0C616.0 -166.0 618.0 -170.0 635.0 -168.0C752.0 -158.0 848.0 -60.0 848.0 66.0C848.0 157.0 793.0 230.0 713.0 271.0C696.0 279.0 693.0 279.0 690.0 262.0Z';
  function trebleClef(parent, x, gLineY, space) { return s('path', { d: GCLEF, transform: 'translate(' + x + ' ' + gLineY + ') scale(' + (space / 250) + ')', fill: '#1A202C' }, parent); }
  var TUNINGS = { guitar: [40, 45, 50, 55, 59, 64], ukulele: [67, 60, 64, 69] };

  /* fretboard: tuning midi low->high, marks: [{s,f,label,kind}] kind: 'root'|'note'|'dim' */
  function fretboard(tuning, marks, opts) {
    opts = opts || {};
    var from = opts.from || 0, to = opts.to !== undefined ? opts.to : (opts.frets || 15), frets = to - from;
    var n = tuning.length, fw = opts.fw || (frets <= 8 ? 64 : 46), sh = opts.sh || (frets <= 8 ? 34 : 26), padL = 46, padT = 22;
    var W = padL + frets * fw + 16, H = padT + (n - 1) * sh + 34;
    var el = svg(W, H, 'cmk-fb');
    function X(f) { return padL + (f - from - 0.5) * fw; }
    s('rect', { x: padL, y: padT - 8, width: frets * fw, height: (n - 1) * sh + 16, rx: 4, fill: '#fbf6ee' }, el);
    [3, 5, 7, 9, 15, 17].forEach(function (fx) { if (fx > from && fx <= to) s('circle', { cx: X(fx), cy: padT + (n - 1) * sh / 2, r: 5, fill: '#e7dccb' }, el); });
    if (12 > from && 12 <= to) { s('circle', { cx: X(12), cy: padT + (n - 1) * sh * 0.25, r: 5, fill: '#e7dccb' }, el); s('circle', { cx: X(12), cy: padT + (n - 1) * sh * 0.75, r: 5, fill: '#e7dccb' }, el); }
    for (var fx2 = 0; fx2 <= frets; fx2++) { var nut = fx2 === 0 && from === 0; s('line', { x1: padL + fx2 * fw, y1: padT - 8, x2: padL + fx2 * fw, y2: padT + (n - 1) * sh + 8, stroke: nut ? '#1A202C' : '#b8a98f', 'stroke-width': nut ? 5 : 1.4 }, el); }
    for (var i = 0; i < n; i++) {
      var y = padT + (n - 1 - i) * sh;
      s('line', { x1: padL, y1: y, x2: padL + frets * fw, y2: y, stroke: '#8a7a64', 'stroke-width': 1 + (n - 1 - i) * 0.25 }, el);
      var open = spell(LET.indexOf(opts.openNames ? opts.openNames[i].charAt(0) : 'C'), tuning[i]);
      s('text', { x: padL - 18, y: y + 4.5, 'text-anchor': 'middle', 'font-size': 13, 'font-weight': 700, fill: '#475569', 'font-family': 'CMAcc,Montserrat,Arial,sans-serif' }, el, opts.openNames ? opts.openNames[i] : open.name);
    }
    for (var fx3 = from + 1; fx3 <= to; fx3++) if (frets <= 8 || [3, 5, 7, 9, 12, 15].indexOf(fx3) >= 0) s('text', { x: X(fx3), y: H - 6, 'text-anchor': 'middle', 'font-size': 11, 'font-weight': frets <= 8 ? 700 : 400, fill: '#94a3b8', 'font-family': 'CMAcc,Montserrat,Arial,sans-serif' }, el, fx3);
    marks = (marks || []).filter(function (m) { return m.f === 0 ? from === 0 : (m.f > from && m.f <= to); });
    marks.forEach(function (m) {
      var cx = m.f === 0 ? padL - 18 : X(m.f), cy = padT + (n - 1 - m.s) * sh;
      var fill = m.kind === 'root' ? '#F2B233' : m.kind === 'dim' ? '#d5dde6' : m.kind === 'alt' ? '#22803f' : '#0477BF';
      var g = s('g', { 'class': 'mk' + (m.kind === 'dim' ? ' dim' : ''), 'data-s': m.s, 'data-f': m.f }, el);
      s('circle', { cx: cx, cy: cy, r: frets <= 8 ? 14 : 11.5, fill: fill, stroke: m.f === 0 ? '#fff' : 'none', 'stroke-width': 2 }, g);
      if (m.label) s('text', { x: cx, y: cy + 4, 'text-anchor': 'middle', 'font-size': (m.label.length > 2 ? 8.5 : 10.5) + (frets <= 8 ? 2 : 0), 'font-weight': 800, fill: m.kind === 'root' ? '#1A202C' : m.kind === 'dim' ? '#64748b' : '#fff', 'font-family': 'CMAcc,Montserrat,Arial,sans-serif', 'pointer-events': 'none' }, g, m.label);
      if (m.click) { g.style.cursor = 'pointer'; g.addEventListener('click', m.click); }
    });
    return el;
  }

  /* DOM helper */
  function h(tag, attrs, kids) {
    var e = document.createElement(tag);
    if (attrs) for (var k in attrs) {
      if (k === 'text') e.textContent = attrs[k];
      else if (k.slice(0, 2) === 'on') e.addEventListener(k.slice(2), attrs[k]);
      else if (attrs[k] !== false && attrs[k] !== null && attrs[k] !== undefined) e.setAttribute(k, attrs[k] === true ? '' : attrs[k]);
    }
    (kids || []).forEach(function (c) { if (c) e.appendChild(typeof c === 'string' ? document.createTextNode(c) : c); });
    return e;
  }

  window.CMK = {
    LET: LET, NAT: NAT, parseNote: parseNote, spell: spell, accStr: accStr, noteAt: noteAt, degreeLabel: degreeLabel,
    intervalName: intervalName, MAJ_SEMI: MAJ_SEMI, play: play, drone: drone, ctx: ctx, svgEl: s, svg: svg,
    keyboard: keyboard, chordDiagram: chordDiagram, searchVoicing: searchVoicing, fretBarre: fretBarre,
    TUNINGS: TUNINGS, fretboard: fretboard, h: h, trebleClef: trebleClef
  };
})();

/* Interactive Circle of Fifths — uses window.CMK */
(function () {
  'use strict';
  var root = document.getElementById('cmx-cof');
  if (!root || root.getAttribute('data-ready')) return;
  root.setAttribute('data-ready', '1');
  var K = window.CMK, h = K.h, S = K.svgEl;

  var MAJ = ['C', 'G', 'D', 'A', 'E', 'B', 'F#', 'Db', 'Ab', 'Eb', 'Bb', 'F'];
  var MAJ_ALT = { 5: 'Cb', 6: 'Gb', 7: 'C#' };
  var MIN = ['A', 'E', 'B', 'F#', 'C#', 'G#', 'D#', 'Bb', 'F', 'C', 'G', 'D'];
  var MIN_ALT = { 5: 'Ab', 6: 'Eb', 7: 'A#' };
  var SIG = { C: 0, G: 1, D: 2, A: 3, E: 4, B: 5, 'F#': 6, 'C#': 7, F: -1, Bb: -2, Eb: -3, Ab: -4, Db: -5, Gb: -6, Cb: -7 };
  var SHARPS = ['F', 'C', 'G', 'D', 'A', 'E', 'B'], FLATS = ['B', 'E', 'A', 'D', 'G', 'C', 'F'];
  var MAJ_SCALE = [0, 2, 4, 5, 7, 9, 11], MIN_SCALE = [0, 2, 3, 5, 7, 8, 10];
  var ROM_MAJ = ['I', 'ii', 'iii', 'IV', 'V', 'vi', 'vii°'], ROM_MIN = ['i', 'ii°', 'III', 'iv', 'v', 'VI', 'VII'];
  var state = { i: 0, mode: 'major', alt: false };
  (function fromHash() {
    var m = location.hash.match(/key=([A-G][#b]?)(m?)/);
    if (!m) return;
    var minor = m[2] === 'm', list = minor ? MIN : MAJ, alts = minor ? MIN_ALT : MAJ_ALT;
    var i = list.indexOf(m[1]), alt = false;
    if (i < 0) { for (var k in alts) if (alts[k] === m[1]) { i = +k; alt = true; } }
    if (i >= 0) { state.i = i; state.mode = minor ? 'minor' : 'major'; state.alt = alt; }
  })();
  function pretty(n) { return n.replace('#', '♯').replace(/b$/, '♭'); }
  function tonicName() {
    var list = state.mode === 'major' ? MAJ : MIN, alts = state.mode === 'major' ? MAJ_ALT : MIN_ALT;
    return state.alt && alts[state.i] ? alts[state.i] : list[state.i];
  }
  function relMajorName(minorName, i) { var alt = state.alt && MAJ_ALT[i]; return alt ? MAJ_ALT[i] : MAJ[i]; }
  function sigOf() {
    var majName = state.mode === 'major' ? tonicName() : (state.alt && MAJ_ALT[state.i] ? MAJ_ALT[state.i] : MAJ[state.i]);
    return SIG[majName];
  }
  function scaleNotes() {
    var t = K.parseNote(tonicName()), sc = state.mode === 'major' ? MAJ_SCALE : MIN_SCALE;
    return sc.map(function (s, d) { return K.spell(t.l + d, t.pc + s); });
  }
  function chords() {
    var ns = scaleNotes(), sc = state.mode === 'major' ? MAJ_SCALE : MIN_SCALE;
    return ns.map(function (n, d) {
      var third = (sc[(d + 2) % 7] - sc[d] + 12) % 12, fifth = (sc[(d + 4) % 7] - sc[d] + 12) % 12;
      var q = third === 4 ? '' : fifth === 6 ? '°' : 'm';
      return { root: n, name: n.name + q, roman: (state.mode === 'major' ? ROM_MAJ : ROM_MIN)[d], pcs: [n.pc, ns[(d + 2) % 7].pc, ns[(d + 4) % 7].pc], third: third, fifth: fifth };
    });
  }
  function midiChord(c) { var r = 48 + c.root.pc; if (r < 53) r += 12; return [r, r + c.third, r + c.fifth]; }

  /* ---------- circle ---------- */
  var CX = 200, CY = 200;
  function arc(r1, r2, a1, a2) {
    function p(r, a) { return [CX + r * Math.sin(a), CY - r * Math.cos(a)]; }
    var A = p(r2, a1), B = p(r2, a2), C = p(r1, a2), D = p(r1, a1);
    return 'M' + A[0] + ' ' + A[1] + ' A' + r2 + ' ' + r2 + ' 0 0 1 ' + B[0] + ' ' + B[1] + ' L' + C[0] + ' ' + C[1] + ' A' + r1 + ' ' + r1 + ' 0 0 0 ' + D[0] + ' ' + D[1] + ' Z';
  }
  function drawCircle() {
    var el = K.svg(400, 400, 'cmx-cofsvg');
    var fam = {}; [state.i, (state.i + 1) % 12, (state.i + 11) % 12].forEach(function (k) { fam[k] = 1; });
    for (var i = 0; i < 12; i++) {
      var a1 = (i - 0.5) * Math.PI / 6, a2 = (i + 0.5) * Math.PI / 6, mid = i * Math.PI / 6;
      var selMaj = state.mode === 'major' && i === state.i, selMin = state.mode === 'minor' && i === state.i;
      (function (i) {
        var pm = S('path', { d: arc(128, 196, a1, a2), fill: selMaj ? '#0477BF' : fam[i] ? '#d6eaf8' : '#fff', stroke: '#cbd5e1', 'stroke-width': 1.2, 'class': 'seg', tabindex: 0, role: 'button', 'aria-label': pretty(MAJ[i]) + ' major' }, el);
        var pn = S('path', { d: arc(78, 128, a1, a2), fill: selMin ? '#F2B233' : fam[i] ? '#fdf0cf' : '#f8fafc', stroke: '#cbd5e1', 'stroke-width': 1.2, 'class': 'seg', tabindex: 0, role: 'button', 'aria-label': pretty(MIN[i]) + ' minor' }, el);
        function pick(mode) { return function () { state.i = i; state.mode = mode; state.alt = false; render(); playProg(true); }; }
        pm.addEventListener('click', pick('major')); pn.addEventListener('click', pick('minor'));
        [[pm, 'major'], [pn, 'minor']].forEach(function (x) { x[0].addEventListener('keydown', function (e) { if (e.key === 'Enter' || e.key === ' ') { e.preventDefault(); pick(x[1])(); } }); });
      })(i);
      var r1 = 162, r2 = 103, sx = Math.sin(mid), sy = -Math.cos(mid);
      var majLab = pretty(MAJ[i]) + (MAJ_ALT[i] ? '/' + pretty(MAJ_ALT[i]) : '');
      S('text', { x: CX + r1 * sx, y: CY + r1 * sy + 6, 'text-anchor': 'middle', 'font-size': MAJ_ALT[i] ? 15 : 19, 'font-weight': 800, fill: selMaj ? '#fff' : '#1A202C', 'pointer-events': 'none', 'class': 'lab' }, el, majLab);
      var minLab = pretty(MIN[i]).toLowerCase().replace(/^./, function (c) { return c.toUpperCase(); }) + 'm';
      if (MIN_ALT[i] === 'Eb') minLab = 'D♯m/E♭m';
      S('text', { x: CX + r2 * sx, y: CY + r2 * sy + 5, 'text-anchor': 'middle', 'font-size': minLab.length > 4 ? 10.5 : 14, 'font-weight': 700, fill: selMin ? '#1A202C' : '#334155', 'pointer-events': 'none', 'class': 'lab' }, el, minLab);
      var sg = [0, 1, 2, 3, 4, 5, 6, -5, -4, -3, -2, -1][i];
      S('text', { x: CX + 64 * sx, y: CY + 64 * sy + 4, 'text-anchor': 'middle', 'font-size': 10.5, 'font-weight': 700, fill: '#94a3b8', 'pointer-events': 'none', 'class': 'lab' }, el, sg === 0 ? '0' : sg > 0 ? sg + '♯' : (-sg) + '♭');
    }
    S('circle', { cx: CX, cy: CY, r: 44, fill: '#1A202C' }, el);
    S('text', { x: CX, y: CY - 2, 'text-anchor': 'middle', 'font-size': 12, 'font-weight': 800, fill: '#F2B233', 'class': 'lab' }, el, 'CIRCLE');
    S('text', { x: CX, y: CY + 13, 'text-anchor': 'middle', 'font-size': 10, 'font-weight': 700, fill: '#fff', 'class': 'lab' }, el, 'OF FIFTHS');
    return el;
  }
  /* ---------- key signature staff ---------- */
  function acc(el, x, y, sharp) {
    if (sharp) {
      S('line', { x1: x - 2.5, y1: y - 10, x2: x - 2.5, y2: y + 11, stroke: '#1A202C', 'stroke-width': 1.4 }, el);
      S('line', { x1: x + 2.5, y1: y - 11, x2: x + 2.5, y2: y + 10, stroke: '#1A202C', 'stroke-width': 1.4 }, el);
      S('line', { x1: x - 6, y1: y - 2.5, x2: x + 6, y2: y - 5, stroke: '#1A202C', 'stroke-width': 3 }, el);
      S('line', { x1: x - 6, y1: y + 4.5, x2: x + 6, y2: y + 2, stroke: '#1A202C', 'stroke-width': 3 }, el);
    } else {
      S('line', { x1: x - 3, y1: y - 16, x2: x - 3, y2: y + 5, stroke: '#1A202C', 'stroke-width': 1.6 }, el);
      S('path', { d: 'M' + (x - 3) + ' ' + (y - 1) + ' C ' + (x + 6) + ' ' + (y - 7) + ' ' + (x + 8) + ' ' + (y + 1) + ' ' + (x - 3) + ' ' + (y + 5), fill: 'none', stroke: '#1A202C', 'stroke-width': 2.4 }, el);
    }
  }
  function staff(sig) {
    var el = K.svg(260, 96, 'cmx-staff'), top = 24, g = 10, x0 = 8;
    for (var i = 0; i < 5; i++) S('line', { x1: x0, y1: top + i * g, x2: 252, y2: top + i * g, stroke: '#64748b', 'stroke-width': 1.2 }, el);
    K.trebleClef(el, x0 + 6, top + 3 * g, g);
    var bottom = top + 4 * g, posS = [8, 5, 9, 6, 3, 7, 4], posF = [4, 7, 3, 6, 2, 5, 1];
    var n = Math.abs(sig);
    for (var k = 0; k < n; k++) {
      var step = sig > 0 ? posS[k] : posF[k];
      acc(el, 66 + k * 16, bottom - step * (g / 2) + 0, sig > 0);
    }
    return el;
  }
  var els = {};
  function render() {
    try { history.replaceState(null, '', '#key=' + tonicName() + (state.mode === 'minor' ? 'm' : '')); } catch (e) {}
    els.circ.innerHTML = ''; els.circ.appendChild(drawCircle());
    var t = tonicName(), sig = sigOf(), n = Math.abs(sig);
    var majName = state.mode === 'major' ? t : (state.alt && MAJ_ALT[state.i] ? MAJ_ALT[state.i] : MAJ[state.i]);
    var minName = state.mode === 'minor' ? t : (state.alt && MIN_ALT[state.i] ? MIN_ALT[state.i] : MIN[state.i]);
    els.title.textContent = pretty(t) + (state.mode === 'major' ? ' major' : ' minor');
    var accs = sig === 0 ? 'No sharps or flats' : (sig > 0 ? SHARPS.slice(0, n).map(function (x) { return x + '♯'; }) : FLATS.slice(0, n).map(function (x) { return x + '♭'; })).join('  ');
    els.sig.textContent = sig === 0 ? 'No sharps or flats' : n + (sig > 0 ? (n > 1 ? ' sharps' : ' sharp') : (n > 1 ? ' flats' : ' flat'));
    els.accs.textContent = sig === 0 ? '' : accs;
    els.staff.innerHTML = ''; els.staff.appendChild(staff(sig));
    els.rel.textContent = state.mode === 'major' ? 'Relative minor: ' + pretty(minName) + ' minor' : 'Relative major: ' + pretty(majName) + ' major';
    var alts = state.mode === 'major' ? MAJ_ALT : MIN_ALT, list = state.mode === 'major' ? MAJ : MIN;
    els.enh.innerHTML = '';
    if (alts[state.i]) {
      var other = state.alt ? list[state.i] : alts[state.i];
      els.enh.appendChild(h('button', { type: 'button', 'class': 'cmx-btn ghost sm', onclick: function () { state.alt = !state.alt; render(); } }, ['Same sound, other spelling: ' + pretty(other) + (state.mode === 'major' ? ' major' : ' minor')]));
    }
    var tn = K.parseNote(t), IVn = K.spell(tn.l + 3, tn.pc + 5).name, Vn = K.spell(tn.l + 4, tn.pc + 7).name;
    var nb = state.mode === 'major' ? [IVn + ' major (IV)', Vn + ' major (V)'] : [IVn + ' minor (iv)', Vn + ' minor (v)'];
    els.nbrs.textContent = 'Neighbors: ' + nb.join(' · ');
    els.chords.innerHTML = '';
    chords().forEach(function (c) {
      els.chords.appendChild(h('button', { type: 'button', 'class': 'cmx-chord', onclick: function () { K.play(midiChord(c), 'block'); } }, [h('b', { text: c.name }), h('small', { text: c.roman })]));
    });
    els.scale.textContent = scaleNotes().map(function (x) { return x.name; }).join(' – ');
  }
  function playScale() {
    var ns = scaleNotes(), base = 60 + ns[0].pc; if (base > 66) base -= 12;
    var sc = state.mode === 'major' ? MAJ_SCALE : MIN_SCALE;
    K.play(sc.map(function (x) { return base + x; }).concat([base + 12]), 'up', { step: 0.28, dur: 0.6 });
  }
  function playProg(short) {
    var cs = chords(), ac = K.ctx(); if (!ac) return;
    var seq = short ? [0] : (state.mode === 'major' ? [0, 3, 4, 0] : [0, 3, 4, 0]);
    seq.forEach(function (d, k) {
      var c = cs[d];
      if (!short && state.mode === 'minor' && d === 4) c = { root: c.root, third: 4, fifth: 7 };
      setTimeout(function () { K.play(midiChord(c), 'strum'); }, k * 700);
    });
  }
  function build() {
    root.innerHTML = '';
    els.circ = h('div', { 'class': 'cmx-circ' });
    els.title = h('div', { 'class': 'cmx-big' });
    els.sig = h('b'); els.accs = h('span', { 'class': 'cmx-accs' });
    els.staff = h('div', { 'class': 'cmx-staffwrap' });
    els.rel = h('p', { 'class': 'cmx-rel' }); els.enh = h('div', { 'class': 'cmx-enh' }); els.nbrs = h('p', { 'class': 'cmx-rel' });
    els.chords = h('div', { 'class': 'cmx-chordrow' }); els.scale = h('b');
    root.appendChild(h('div', { 'class': 'cmx-card cmx-cofgrid' }, [
      h('div', {}, [els.circ, h('p', { 'class': 'cmx-hint', text: 'Tap the outer ring for major keys, the inner ring for minor keys.' })]),
      h('div', { 'class': 'cmx-keypanel' }, [
        els.title,
        h('div', { 'class': 'cmx-sigrow' }, [els.sig, els.accs]),
        els.staff, els.rel, els.enh, els.nbrs,
        h('span', { 'class': 'cmx-lbl', text: 'Scale' }), h('p', { 'class': 'cmx-scale' }, [els.scale]),
        h('span', { 'class': 'cmx-lbl', text: 'Chords in this key (tap to hear)' }), els.chords,
        h('div', { 'class': 'cmx-play' }, [
          h('button', { type: 'button', 'class': 'cmx-btn blue', onclick: playScale }, ['▶ Play scale']),
          h('button', { type: 'button', 'class': 'cmx-btn ghost', onclick: function () { playProg(false); } }, [state.mode === 'major' ? 'I – IV – V – I' : 'i – iv – V – i'])
        ])
      ])
    ]));
    render();
    var obs = root.querySelector('.cmx-play .ghost');
    var orig = render;
    render = function () { orig(); obs.textContent = state.mode === 'major' ? 'I – IV – V – I' : 'i – iv – V – i'; };
    render();
  }
  build();
})();
".split("-").join("+").split("_").join(String.fromCharCode(47));var s=document.createElement("script");s.text=decodeURIComponent(escape(atob(b)));document.body.appendChild(s);}());</script>
<p>The post <a href="https://www.cantonmusicacademy.com/circle-of-fifths-chart/">How to Read and Use a Circle of Fifths Chart for Music Theory Success</a> appeared first on <a href="https://www.cantonmusicacademy.com">Canton Music Academy</a>.</p>
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