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---
---
{% include note_variables.html %}
<!doctype html>
<html>
<head>
<title>Chord Identification Method Trainer</title>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport"
content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
<meta http-equiv="Content-Language" content="en">
<meta name="color-scheme" content="light dark">
<meta name="description" content="This is an implementation of Eguchi's Chord Identification method (paper access can be found via Sci-Hub). See also Ichionkai Music School.
This is a method for teaching absolute pitch to children aged 2-6. Children should practice ~5x per day for 2-3 minutes (about 20-25 identifications). Chords are always identified with colors, and progress in the sequence red (CEG), yellow (CFA), blue (HDG), black (ACF), green (DGH), orange (EGC), purple (FAC), pink (GHD), brown (GCE).">
<link rel="preload" href={{ "assets/fonts/forkawesome-webfont.woff2?v=1.2.0" }}
as="font" type="font/woff2" crossorigin="">
<link rel="stylesheet" href="{{ "assets/css/style.css" }}">
<link rel="shortcut icon" type="image/png" href="{{ "assets/images/favicon.png" }}">
<link rel="manifest" href="{{ "assets/manifest.json" }}">
<style>
{% capture sass_file %}
{% include _note_shapes.scss %}
{% endcapture %}
{{ sass_file | scssify }}
</style>
</head>
<script>
const FIRST_BLACK_INDEX = {{ first_black_index }};
const CHORDS_TONE = {
{%- for color in site.data.chords -%}
"{{ color.name }}": [{%-for chord in color.notes-%}"{{chord}}",{%-endfor-%}],
{%- endfor -%}
};
const UNSORTED_AUDIO_FILES = [
{%- for file in site.static_files -%}
{%- if file.extname == ".mp3" and file.path contains "/static_files/chords" -%}
"{{ file.name }}",
{%- endif -%}
{%- endfor -%}
];
const INSTRUMENT_INFO = {
{%- for instrument in site.data.instruments -%}
{%- assign base_url = 'static_files/samples/' | append: instrument.name -%}
{%- assign instrument_files = site.static_files |
where_exp: "file",
"file.extname == '.mp3' and file.path contains base_url" -%}
"{{instrument.name}}": {
"display_name": "{{instrument.display}}",
"base_url": "{{base_url}}/",
{%- if instrument.legacy -%}
"legacy": true,
"fallback": "{{ instrument.fallback }}",
{%- else -%}
"legacy": false,
"sample_files": {
{%- for file in instrument_files -%}
"{{ file.name | split: 'v' | first }}" : "{{ file.name | replace: '#', '%23' }}",
{%- endfor -%}
},
{%- endif -%}
},
{%- endfor -%}
};
</script>
<script type="module" src="js/vendor/Tone.js"></script>
<script src="js/cim.js"></script>
<script>
function is_ios() {
return [
'iPad Simulator',
'iPhone Simulator',
'iPod Simulator',
'iPad',
'iPhone',
'iPod'
].includes(navigator.platform)
// iPad on iOS 13 detection
|| (navigator.userAgent.includes("Mac") && "ontouchend" in document)
}
// Disable zoom on iOS 10+ (normally I would be against this, but it's
// causing usability problems)
if (is_ios()) {
document.addEventListener('gesturestart', function (e) {
e.preventDefault();
});
}
</script>
</head>
<body class="colorscheme-dark">
<div class="cim-container">
<div class="menu-container" id="menu-container">
<div class="menu-spacer"></div>
<div class="expansion-container">
<div class="infobox-container">
<a href="#"
id="trainer-infobox-trigger"
class="infobox-trigger"
onclick="toggle_trainer_visibility()">
<i class="fa fa-solid fa-music"></i>
</a>
</div>
<div class="infobox-container">
<a href="#" class="infobox-trigger"
id="i-infobox-trigger"
onclick="toggle_infobox_visibility()">
<i class="fa fa-solid fa-info-circle"></i>
</a>
</div>
<div class="infobox-container">
<a href="#"
id="stats-history-trigger"
class="infobox-trigger"
onclick="toggle_stats_history_visibility()">
<i class="fa fa-solid fa-line-chart"></i>
</a>
</div>
<div class="infobox-container">
<a href="#"
id="profile-settings-trigger"
class="infobox-trigger"
onclick="toggle_profile_settings_visibility()">
<i class="fa fa-solid fa-gear"></i>
</a>
</div>
<!-- Profiles -->
<div class="infobox-container">
<div class="trigger-container" id="user-container">
<a href="#"
id="profile-infobox-trigger"
class="infobox-trigger"
onclick="toggle_profile_visibility()">
<i class="fa fa-solid" id="profile-icon"></i>
<span id="profile-text" class="pulldown-target"></span>
</a>
<div class="pulldown infobox" id="profile-container">
<div class="pulldown-item" onclick="open_profile_adder()">
<i class="profile-icon fa fa-solid fa-user-plus"></i><span class="profile-name">Add Profile</span>
</div>
</div>
</div>
</div>
</div>
<div class="hamburger">
<a href="#"
id="hamburger-link"
onclick="toggle_expansion_bar()"
>
<i class="fa fa-bars"></i>
</a>
</div>
</div>
<div class="control-wrapper">
<img src="{{ "assets/images/cim_logo.png" }}" class="logo" onclick="enable_download()"/>
<div class="control-container">
<div class="controls">
<a id="play-button" class="deactivated" onclick="play_audio()">
<i class="fa fa-play" aria-hidden="true"></i>
</a>
<a id="next-chord" class="deactivated" onclick="next_audio()">
<i class="fa fa-arrow-right" aria-hidden="true"></i>
</a>
</div>
</div>
</div>
<div class="flag-container" id="flag-holder">
<div class="flag-spacer"></div>
{%- for color in site.data.chords -%}
<div class="flag-wrapper" id="{{ color.name }}-flag" data-color="{{ color.name}}">
<div class="flag {{ color.name }}" onclick="select_flag(this);">
<i class="answer-icon correct fa"></i>
<i class="answer-icon incorrect fa"></i>
<div class="chord-notes-container chord-{{color.chord | replace: "/", "-"}}">
{%- assign _notes = display_notes
| where_exp: "display", "display.first == color.name"
| first | last -%}
{%- for note in _notes -%}
{%- assign absolute_note = color.notes[forloop.index0]
| replace: "#", "-sharp" -%}
{%- assign note_class = note
| replace: "#", "-sharp"
| replace: "b", "-flat"
| prepend: "note-" -%}
<div class="note-wrapper {{note_class}} note-{{absolute_note}}">
<div class="note"></div>
<div class="note-text">
<span class="note-text-span">{{ note | replace: "#", "♯" | replace: "b", "♭" }}</span>
</div>
</div>
{%- endfor -%}
</div>
</div>
</div>
{%- endfor -%}
<div class="flag-spacer"></div>
</div>
<div class="stats controls" id="stats-container">
<div class="emoji-container">
<span id="reaction-emoji"></span>
</div>
<div class="stats-wrapper">
<div class="stats-display chord-stats-display" id="chord-stats-display">
<div class="num-correct">
<span class="stats-correct" id="stats-correct">0</span><span class="stats-divider" id="stats-divider"> / </span><span class="stats-total" id="stats-total">0</span>
</div>
<div class="percent">
<span class="stats-percent" id="stats-percent"></span>
</div>
</div>
<div class="stats-display sn-stats-display" id="sn-stats-display">
<span id="note-emoji">♪</span>
<div class="num-correct">
<span class="stats-correct" id="note-stats-correct">0</span><span class="stats-divider" id="note-stats-divider"> / </span><span class="stats-total" id="note-stats-total">0</span>
</div>
<div class="percent">
<span class="stats-percent" id="note-stats-percent"></span>
</div>
</div>
</div>
<a id="reset-button" onclick="reset_stats()">
<i class="fa fa-refresh" aria-hidden="true"></i>
</a>
</div>
<div class="selectors">
<select class="selector" name="chords" id="chord-selector" onchange="change_selector()">
<optgroup label="White chords">
{%- assign level = 0 -%}
{% for color in site.data.chords %}
{%- assign idx = forloop.index0 | int -%}
{%- if idx == first_black_index -%}
{%- assign level = 1 -%}
</optgroup>
<optgroup label="Black chords">
{%- endif -%}
{%- assign _notes_display = display_notes
| where_exp: "display", "display.first == color.name"
| first | last | join: " " |
replace: "#", "♯" | replace: "b", "♭" -%}
<option value="{{color.name}}"{%-if idx < 1 -%} hidden{%-endif-%}>Level {{level}}: {{color.display}} ({{_notes_display}})</option>
{%- assign level = level | plus: 1 -%}
{% endfor %}
</optgroup>
</select>
<select class="selector" name="instruments" id="instrument-selector" onchange="change_instrument()">
{%- for instrument in site.data.instruments -%}
<option value="{{instrument.name}}">{{instrument.display}}</option>
{%- endfor -%}
</select>
</div>
</div>
<div class="mode-toggle-container">
<a id="mode-toggle" class="colorscheme-toggle"
onclick="toggle_theme_mode()"
>
<i class="fa fa-adjust fa-fw" aria-hidden="true"></i>
</a>
<a id="download-link" class="download-button colorscheme-toggle" onclick="download_state()">
<i class="fa fa-download fa-fw" aria-hidden="true"></i>
</a>
</div>
<!------------------------------------------------------>
<!---------------------- Modals ---------------------->
<!------------------------------------------------------>
<!-- Infobox -->
<div class="infobox" id="i-infobox">
<p>This is an implementation of <a href="http://pom.sagepub.com/content/42/1/86">Eguchi's Chord Identification method</a> (paper access can be found via <a href="https://en.wikipedia.org/wiki/Sci-Hub">Sci-Hub</a>). See also <a href="https://ichionkai.co.jp/english3.html">Ichionkai Music School</a>.</p>
<p><a href="https://youtu.be/kNfkm6PQC20">Here is a short video explaining how we use it</a>.</p>
<p>This is a method for teaching absolute pitch to children aged 2-6. Children should practice ~5x per day for 2-3 minutes (about 20-25 identifications). Chords are always identified with colors, and progress in the sequence <span onclick="trigger_easter_egg()">red</span> (CEG), yellow (CFA), blue (HDG), black (ACF), green (DGH), orange (EGC), purple (FAC), pink (GHD), brown (GCE).</p>
<p>Introduce the chords to the children one at a time, spacing out new chord introductions by at least 2 weeks each time. Do not introduce a new chord until the child can identify all presented chords with 100% accuracy.</p>
<p><b>Note</b>: This application is an early alpha. I'm still in the first training phase so I've put off work on the later parts of the method until my son catches up. Let me know if you need a feature to make this work, of if it seems that I've misunderstood the method as described in the paper. Please feel free to make pull requests or report issues on <a href="https://github.com/pganssle/cim">the GitHub repository</a>.</p>
</div>
<!-- Music player -->
<div class="infobox" id="trainer-infobox">
<div class="box-title">
Music Trainer: Play the chords manually
</div>
<div class="trainer-container">
{%- for color in site.data.chords -%}
<div class="flag-wrapper trainer visible">
<div class="flag trainer {{color.name}}" onclick="play_chord('{{color.name}}');"></div>
</div>
{%- endfor -%}
</div>
</div>
<!-- Single Note Quiz -->
<div class="infobox" id="single-note-trainer">
<div id="single-note-selector-container">
{%- for note in all_notes -%}
{%- assign display = note[0] -%}
{%- assign note_class = note[1] -%}
{%- assign absolute_class = note[2] -%}
{%- assign note_base = note[3] -%}
<div class="note-target {{note_class}} {{absolute_class}}" data-note="{{note_base}}" onclick="select_single_note(this)">
<i class="answer-icon correct fa"></i>
<i class="answer-icon incorrect fa"></i>
<div class="note-wrapper {{note_class}} {{absolute_class}}">
<div class="note"></div>
<div class="note-text">
<span class="note-text-span">{{display}}</span>
</div>
</div>
</div>
{%- endfor -%}
</div>
<div class="control-container">
<div class="controls">
<a id="sn-play-again-button" onclick="play_single_note_audio()">
<i class="fa fa-play" aria-hidden="true"></i>
</a>
<a id="sn-note-next-button" class="deactivated" onclick="single_note_done(true)">
<i class="fa fa-arrow-right" aria-hidden="true"></i>
</a>
<a id="sn-note-done-button" class="deactivated" onclick="single_note_done(false)">
<i class="fa fa-times" aria-hidden="true"></i>
</a>
</div>
</div>
</div>
<!-- Statistics -->
<div class="infobox stats-history-container" id="stats-history-container"></div>
<!-- "Add profile" / "Profile settings" dialog -->
<div class="profile-info-container" id="profile-info-container">
<span class="close-button" id="close-add-profile-container-button" onclick="close_profile_adder()">×</span>
<div class="entry-row">
<label for="profile_name">Profile Name:</label>
<input type="text" id="profile_name_setting" class="entry">
</div>
<div class="entry-row">
<label for="profile_icon_selector">Icon:</label><br/>
<input type="radio" name="profile_icon_selector"
value="fa-user" id="npis-user">
<label for="npis-user"><i class="fa fa-solid fa-user"></i></label>
<input type="radio" name="profile_icon_selector"
value="fa-truck" id="npis-truck">
<label for="npis-truck"><i class="fa fa-solid fa-truck"></i></label>
<input type="radio" name="profile_icon_selector"
value="fa-bolt" id="npis-bolt">
<label for="npis-bolt"><i class="fa fa-solid fa-bolt"></i></label>
<input type="radio" name="profile_icon_selector"
value="fa-paw" id="npis-paw">
<label for="npis-paw"><i class="fa fa-solid fa-paw"></i></label>
<input type="radio" name="profile_icon_selector"
value="fa-soccer-ball-o" id="npis-soccer-ball">
<label for="npis-paw"><i class="fa fa-solid fa-soccer-ball-o"></i></label>
<input type="radio" name="profile_icon_selector"
value="fa-smile-o" id="npis-smile-o">
<label for="npis-smile-o"><i class="fa fa-solid fa-smile-o"></i></label>
<input type="radio" name="profile_icon_selector"
value="fa-umbrella" id="npis-umbrella">
<label for="npis-umbrella"><i class="fa fa-solid fa-umbrella"></i></label>
<input type="radio" name="profile_icon_selector"
value="fa-trophy" id="npis-trophy">
<label for="npis-trophy"><i class="fa fa-solid fa-trophy"></i></label>
<input type="radio" name="profile_icon_selector"
value="fa-taxi" id="npis-taxi">
<label for="npis-taxi"><i class="fa fa-solid fa-taxi"></i></label>
</div>
<div class="entry-row">
<label for="show_chord_name_mode">Show chord names:</label><br/>
<select class="selector" name="show_chord_name_mode" id="show-chord-name-mode-selector">
<option value="always">Always</option>
<option value="black_only">Black chords only</option>
<option value="never">Never</option>
</select>
<select class="selector" name="chord_reveal_mode" id="chord-reveal-mode-selector">
<option value="always">Always on</option>
<option value="after_guess">Reveal after guess</option>
</select>
</div>
<div class="entry-row">
<label for="chord_name_display_mode">Chord name display:</label>
<select class="selector" name="chord_name_display_mode" id="chord-name-display-mode-selector">
<option value="shapes_and_letters">Shapes and Letters</option>
<option value="shapes_only">Shapes only</option>
<option value="letters_only">Letters only</option>
</select>
</div>
<div class="entry-row">
<label for="single_note_trainer_mode">Single Note Trainer:</label><br/>
<select class="selector" name="single_note_trainer_mode" id="single-note-trainer-mode-selector">
<option value="white_only_on_black">White chords only on black chord levels</option>
<option value="all_on_black">All chords on black chord levels</option>
<option value="always">Always</option>
<option value="never">Never</option>
</select>
<select class="selector" name="single_note_trainer_correctness_mode" id="single-note-trainer-correctness-mode-selector">
<option value="only_correct">Only when correct</option>
<option value="only_incorrect">Only when wrong</option>
<option value="always">Always</option>
</select>
</div>
<div class="entry-row">
<label for="target_number_setting">Target Number:</label>
<input type="number" id="target_number_setting" class="entry">
</div>
<div class="button-container">
<button class="button settings-button" id="delete-profile-button" onclick="delete_profile()">Delete Profile</button>
<button class="button settings-button" id="submit-changes-button" onclick="submit_profile_changes()">Save Changes</button>
<button class="button add-button" id="add-user-button" onclick="add_profile()">Add Profile</button>
</div>
</div>
<div class="shape-container">
{% include note_shapes.svg %}
</div>
</body>
</html>