diff --git a/.gitignore b/.gitignore
index c2aea7406..fdb55f0da 100644
--- a/.gitignore
+++ b/.gitignore
@@ -219,3 +219,7 @@ _codeql_detected_source_root
 .grepai/
 .codegraph/
 *.bak
+
+# audioMotion-analyzer is AGPL-3.0-or-later and is installed by the
+# administrator rather than shipped; see its src/help.txt.
+web/skins/*/assets/audioMotion-analyzer/src/audioMotion-analyzer.js
diff --git a/tests/js/audiomotion-paths.test.js b/tests/js/audiomotion-paths.test.js
new file mode 100644
index 000000000..9a43296d0
--- /dev/null
+++ b/tests/js/audiomotion-paths.test.js
@@ -0,0 +1,150 @@
+'use strict';
+
+// The audioMotion-analyzer library is not shipped with ZoneMinder (it is
+// AGPL-3.0-or-later), so the admin installs it by hand following instructions
+// that live in four places: the skin's PHP feature probe, the dynamic import in
+// the skin JS, the help.txt beside the install location, and the translated
+// help/strings. They drifted apart once already, sending people to a URL that
+// serves a different build of the library than the one the import expects.
+// These tests pin them to each other.
+
+const assert = require('assert');
+const fs = require('fs');
+const path = require('path');
+
+const root = path.join(__dirname, '../..');
+const read = (p) => fs.readFileSync(path.join(root, p), 'utf8');
+
+const INSTALL_PATH = 'assets/audioMotion-analyzer/src/audioMotion-analyzer.js';
+
+const functionsPhp = read('web/skins/classic/includes/functions.php');
+const analyzerJs = read('web/skins/classic/js/audioMotionAnalyzer.js');
+const helpTxt = read('web/skins/classic/' + INSTALL_PATH.replace(/[^/]+$/, 'help.txt'));
+const assetsVersion = read('web/skins/classic/assets/version');
+const enGb = read('web/lang/en_gb.php');
+const ruRu = read('web/lang/ru_ru.php');
+
+let passed = 0;
+let failed = 0;
+function test(name, fn) {
+  try {
+    fn();
+    console.log('  ok ' + name);
+    passed++;
+  } catch (e) {
+    console.error('  FAIL ' + name);
+    console.error('    ' + e.message);
+    failed++;
+  }
+}
+
+console.log('install path agreement');
+
+test('AUDIO_MOTION_ENABLED probes the path the skin JS imports', () => {
+  const probe = functionsPhp.match(/define\("AUDIO_MOTION_ENABLED",\s*file_exists\("([^"]+)"\)\)/);
+  assert.ok(probe, 'AUDIO_MOTION_ENABLED define not found in functions.php');
+  // skins/$skin/assets/... -> assets/...
+  const probed = probe[1].replace(/^skins\/\$skin\//, '');
+  assert.strictEqual(probed, INSTALL_PATH);
+
+  const imported = analyzerJs.match(/import\('([^']+audioMotion-analyzer\.js)'\)/);
+  assert.ok(imported, 'dynamic import of the library not found in audioMotionAnalyzer.js');
+  // The import is relative to skins/<skin>/js/, so ../assets/... is assets/...
+  assert.strictEqual(imported[1].replace(/^\.\.\//, ''), INSTALL_PATH);
+});
+
+test('help.txt tells the admin the path the code actually looks at', () => {
+  assert.ok(
+      helpTxt.includes('skins/classic/' + INSTALL_PATH),
+      'help.txt does not name skins/classic/' + INSTALL_PATH);
+});
+
+test('the help text does not use a placeholder skin name', () => {
+  for (const [name, text] of [['help.txt', helpTxt], ['en_gb.php', enGb], ['ru_ru.php', ruRu]]) {
+    assert.ok(!/MySkin/.test(text), name + ' still refers to the "MySkin" placeholder');
+  }
+});
+
+console.log('download instructions');
+
+// The package root serves "main", the minified UMD bundle in dist/. Only the
+// explicit /src/ path serves the ES module that the dynamic import needs, so
+// the bare URL may appear only on a line that warns against using it.
+const LINK = /https:\/\/cdn\.jsdelivr\.net\/npm\/audiomotion-analyzer@[^\s'",)]*/g;
+// The Russian phrase is written with \u escapes so this file stays ASCII
+// and passes utils/check-homoglyphs.py.
+const RU_DO_NOT_USE = '\u041d\u0435 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0439\u0442\u0435';
+const isWarning = (line) => /\bbare\b|Do not use/i.test(line) || line.includes(RU_DO_NOT_USE);
+
+test('every jsDelivr link offered for download points at src/audioMotion-analyzer.js', () => {
+  for (const [name, text] of [['help.txt', helpTxt], ['en_gb.php', enGb], ['ru_ru.php', ruRu], ['assets/version', assetsVersion]]) {
+    let offered = 0;
+    for (const line of text.split('\n')) {
+      for (const match of line.match(LINK) || []) {
+        if (isWarning(line)) continue;
+        // "~~" is the lang catalogues' line-break marker, not part of the URL.
+        const link = match.replace(/~~$/, '');
+        offered++;
+        assert.ok(
+            link.endsWith('/src/audioMotion-analyzer.js'),
+            name + ' offers ' + link + ', which serves the UMD bundle, not the ES module');
+      }
+    }
+    assert.ok(offered, name + ' offers no jsDelivr download link');
+  }
+});
+
+test('isWarning only exempts lines that tell you not to use the URL', () => {
+  assert.ok(isWarning('Do not use the bare https://cdn.jsdelivr.net/npm/audiomotion-analyzer@X.X.X URL'));
+  assert.ok(!isWarning('https://cdn.jsdelivr.net/npm/audiomotion-analyzer@X.X.X/src/audioMotion-analyzer.js'));
+});
+
+console.log('version agreement');
+
+const supported = analyzerJs.match(/SUPPORTED_AUDIO_MOTION_ANALYZER_VERSION\s*=\s*'([^']+)'/);
+
+test('audioMotionAnalyzer.js declares the supported version', () => {
+  assert.ok(supported, 'SUPPORTED_AUDIO_MOTION_ANALYZER_VERSION not found');
+  assert.match(supported[1], /^\d+\.\d+\.\d+$/);
+});
+
+test('assets/version documents the same version the code requires', () => {
+  const entry = assetsVersion.match(/audioMotion-analyzer - (\d+\.\d+\.\d+)/);
+  assert.ok(entry, 'assets/version has no audioMotion-analyzer entry');
+  assert.strictEqual(entry[1], supported[1]);
+});
+
+test('help.txt does not hard-code a second copy of the version', () => {
+  assert.ok(
+      !helpTxt.includes(supported[1]),
+      'help.txt repeats the version ' + supported[1] + '; it should point at ' +
+      'SUPPORTED_AUDIO_MOTION_ANALYZER_VERSION instead');
+});
+
+console.log('translation keys');
+
+test('en_gb and ru_ru define the same AudioMotion keys', () => {
+  const keys = (text) => (text.match(/'(AudioMotion\w+|RequiresAudioMotionEnabled)'\s*=>/g) || [])
+      .map((m) => m.match(/'([^']+)'/)[1]).sort();
+  assert.deepStrictEqual(keys(enGb), keys(ruRu));
+  assert.ok(keys(enGb).length >= 4, 'expected the AudioMotion* strings to be present');
+});
+
+test('the version-check strings use the placeholders monitor.js substitutes', () => {
+  const monitorJs = read('web/skins/classic/views/js/monitor.js');
+  const substituted = (monitorJs.match(/replaceAll\('\{(\w+)\}'/g) || [])
+      .map((m) => m.match(/\{(\w+)\}/)[1]);
+  assert.ok(substituted.length, 'monitor.js substitutes no AudioMotion placeholders');
+  for (const [name, text] of [['en_gb.php', enGb], ['ru_ru.php', ruRu]]) {
+    const used = new Set((text.match(/\{(AudioMotionVersion\w+)\}/g) || []).map((m) => m.slice(1, -1)));
+    for (const ph of used) {
+      assert.ok(
+          substituted.includes(ph),
+          name + ' uses {' + ph + '}, which monitor.js never substitutes');
+    }
+  }
+});
+
+console.log('');
+console.log(passed + ' passed, ' + failed + ' failed');
+process.exit(failed ? 1 : 0);
diff --git a/web/lang/en_gb.php b/web/lang/en_gb.php
index c3a64187f..4f40dad70 100644
--- a/web/lang/en_gb.php
+++ b/web/lang/en_gb.php
@@ -144,8 +144,8 @@ $SLANG = array(
     'AttrStartWeekday'      => 'Start Weekday',
     'AttrEndWeekday'        => 'End Weekday',
     'AudioMotionVersionOK'  => 'Correct version installed "{AudioMotionVersionInstalled}"',
-    'AudioMotionVersionNotInstalled' => 'Requires audio motion analyzer version "{AudioMotionVersionRequired}" to be installed~~Download link: https://cdn.jsdelivr.net/npm/audiomotion-analyzer@{AudioMotionVersionRequired} or https://github.com/hvianna/audioMotion-analyzer/releases/tag/{AudioMotionVersionRequired}',
-    'AudioMotionVersionWrongVersion' => 'The required analyzer version is "{AudioMotionVersionRequired}", but you have "{AudioMotionVersionInstalled}" installed~~Download link: https://cdn.jsdelivr.net/npm/audiomotion-analyzer@{AudioMotionVersionRequired} or https://github.com/hvianna/audioMotion-analyzer/releases/tag/{AudioMotionVersionRequired}',
+    'AudioMotionVersionNotInstalled' => 'Requires audio motion analyzer version "{AudioMotionVersionRequired}" to be installed~~Download link: https://cdn.jsdelivr.net/npm/audiomotion-analyzer@{AudioMotionVersionRequired}/src/audioMotion-analyzer.js or https://github.com/hvianna/audioMotion-analyzer/releases/tag/{AudioMotionVersionRequired}',
+    'AudioMotionVersionWrongVersion' => 'The required analyzer version is "{AudioMotionVersionRequired}", but you have "{AudioMotionVersionInstalled}" installed~~Download link: https://cdn.jsdelivr.net/npm/audiomotion-analyzer@{AudioMotionVersionRequired}/src/audioMotion-analyzer.js or https://github.com/hvianna/audioMotion-analyzer/releases/tag/{AudioMotionVersionRequired}',
     'Auth'                  => 'Authentication',
     'AutoStopTimeout'       => 'Auto Stop Timeout',
     'AvgBrScore'            => 'Avg.<br/>Score',
@@ -702,7 +702,7 @@ $SLANG = array(
     'ReplaySingle'          => 'Single Event',
     'ReportEventAudit'      => 'Audit Events Report',
     'RequestMissing'        => 'The request is missing',
-    'RequiresAudioMotionEnabled' => 'Requires installation of the file "audioMotion-analyzer.js"',
+    'RequiresAudioMotionEnabled' => 'Requires installation of the file "skins/classic/assets/audioMotion-analyzer/src/audioMotion-analyzer.js"',
     'ResetEventCounts'      => 'Reset Event Counts',
     'RestrictedCameraIds'   => 'Restricted Camera Ids',
     'RestrictedMonitors'    => 'Restricted Monitors',
@@ -1167,10 +1167,12 @@ Always: A zmc process will run and immediately connect and stay connected.~~~~
   'OPTIONS_WHATTODISPLAY' => array(
      'Help' => '
      On the Watch, Montage, Event page, you can display either a video stream, or an audio stream visualization, or both a video stream and an audio visualization.~~
-     To display the audio motion visualization, install the file "/skins/MySkin/assets/audioMotion-analyzer/src/audioMotion-analyzer.js".~~
-     This file can be downloaded from the following links:~~
-     https://cdn.jsdelivr.net/npm/audiomotion-analyzer@X.X.X where X.X.X is the version number~~
-     https://github.com/hvianna/audioMotion-analyzer/releases
+     The visualization is drawn by the audioMotion-analyzer library, which is licensed AGPL-3.0-or-later and so is not shipped with ZoneMinder. To display it, install the library as "skins/classic/assets/audioMotion-analyzer/src/audioMotion-analyzer.js" under your web directory, substituting your own skin name for "classic" if you use a different skin.~~
+     Download it from one of the following, where X.X.X is the required version:~~
+     https://cdn.jsdelivr.net/npm/audiomotion-analyzer@X.X.X/src/audioMotion-analyzer.js~~
+     https://github.com/hvianna/audioMotion-analyzer/releases/tag/X.X.X (the file is under src/ in the source tarball)~~
+     Do not use the bare https://cdn.jsdelivr.net/npm/audiomotion-analyzer@X.X.X URL: it serves the minified UMD bundle rather than the ES module this path expects.~~
+     The required version is reported below this setting, and is set by SUPPORTED_AUDIO_MOTION_ANALYZER_VERSION in skins/classic/js/audioMotionAnalyzer.js.
      ',
     ),
   'FUNCTION_ANALYSIS_ENABLED' => array(
diff --git a/web/lang/ru_ru.php b/web/lang/ru_ru.php
index 4b7881546..496ec7caf 100644
--- a/web/lang/ru_ru.php
+++ b/web/lang/ru_ru.php
@@ -139,8 +139,8 @@ $SLANG = array(
     'AttrSystemLoad'       => 'Нагрузка проц.',
     'AttrTotalScore'       => 'Сумм. оценка',
     'AudioMotionVersionOK' => 'Установлена корректная версия "{AudioMotionVersionInstalled}"',
-    'AudioMotionVersionNotInstalled' => 'Требуется установка audio motion analyzer версии "{AudioMotionVersionRequired}"~~Ссылка для загрузки: https://cdn.jsdelivr.net/npm/audiomotion-analyzer@{AudioMotionVersionRequired} или https://github.com/hvianna/audioMotion-analyzer/releases/tag/{AudioMotionVersionRequired}',
-    'AudioMotionVersionWrongVersion' => 'Требуется версия анализатора "{AudioMotionVersionRequired}", но у Вас установлена "{AudioMotionVersionInstalled}"~~Ссылка для загрузки: https://cdn.jsdelivr.net/npm/audiomotion-analyzer@{AudioMotionVersionRequired} или https://github.com/hvianna/audioMotion-analyzer/releases/tag/{AudioMotionVersionRequired}',
+    'AudioMotionVersionNotInstalled' => 'Требуется установка audio motion analyzer версии "{AudioMotionVersionRequired}"~~Ссылка для загрузки: https://cdn.jsdelivr.net/npm/audiomotion-analyzer@{AudioMotionVersionRequired}/src/audioMotion-analyzer.js или https://github.com/hvianna/audioMotion-analyzer/releases/tag/{AudioMotionVersionRequired}',
+    'AudioMotionVersionWrongVersion' => 'Требуется версия анализатора "{AudioMotionVersionRequired}", но у Вас установлена "{AudioMotionVersionInstalled}"~~Ссылка для загрузки: https://cdn.jsdelivr.net/npm/audiomotion-analyzer@{AudioMotionVersionRequired}/src/audioMotion-analyzer.js или https://github.com/hvianna/audioMotion-analyzer/releases/tag/{AudioMotionVersionRequired}',
     'Auth'                 => 'Авторизация',
     'Auto'                 => 'Авто',
     'AutoStopTimeout'      => 'Тайм-аут автоостановки',
@@ -685,7 +685,7 @@ $SLANG = array(
     'ReportEventAudit'     => 'Отчёт о событиях аудита',    // Edited - 2019-03-24
     'Reports'              => 'Отчеты',
     'RequestMissing'       => 'В запросе отсутствует',
-    'RequiresAudioMotionEnabled' => 'Требуется установка файла "audioMotion-analyzer.js"',
+    'RequiresAudioMotionEnabled' => 'Требуется установка файла "skins/classic/assets/audioMotion-analyzer/src/audioMotion-analyzer.js"',
     'Reset'                => 'Сбросить',
     'ResetEventCounts'     => 'Обнулить счетчик событий',
     'Restart'              => 'Перезапустить',
@@ -1232,10 +1232,12 @@ $OLANG = array(
    'OPTIONS_WHATTODISPLAY' => array(
     'Help' => '
      На страницах живого просмотра, монтажа и просмотра события возможно отображение движения аудио.~~
-     Для этого необходимо установить файл "/skins/MySkin/assets/audioMotion-analyzer/src/audioMotion-analyzer.js".~~
-     Указанный файл можно скачать по ссылкам:~~
-     https://cdn.jsdelivr.net/npm/audiomotion-analyzer@X.X.X где X.X.X это номер версии~~
-     https://github.com/hvianna/audioMotion-analyzer/releases
+     Библиотека audioMotion-analyzer распространяется под лицензией AGPL-3.0-or-later и не входит в состав ZoneMinder. Для отображения визуализации необходимо установить файл "skins/classic/assets/audioMotion-analyzer/src/audioMotion-analyzer.js" в веб-каталоге, заменив "classic" на имя используемого скина.~~
+     Указанный файл можно скачать по ссылкам, где X.X.X это номер требуемой версии:~~
+     https://cdn.jsdelivr.net/npm/audiomotion-analyzer@X.X.X/src/audioMotion-analyzer.js~~
+     https://github.com/hvianna/audioMotion-analyzer/releases/tag/X.X.X (файл находится в каталоге src/ архива с исходным кодом)~~
+     Не используйте ссылку https://cdn.jsdelivr.net/npm/audiomotion-analyzer@X.X.X без пути: по ней отдаётся минифицированная UMD-сборка, а не ES-модуль, который ожидается по этому пути.~~
+     Требуемая версия указана ниже, под этой настройкой, и задаётся константой SUPPORTED_AUDIO_MOTION_ANALYZER_VERSION в файле skins/classic/js/audioMotionAnalyzer.js.
     '
    ),
   'FUNCTION_ANALYSIS_ENABLED' => array(
diff --git a/web/skins/classic/assets/audioMotion-analyzer/src/help.txt b/web/skins/classic/assets/audioMotion-analyzer/src/help.txt
index b3a0eb5d7..85447bffe 100644
--- a/web/skins/classic/assets/audioMotion-analyzer/src/help.txt
+++ b/web/skins/classic/assets/audioMotion-analyzer/src/help.txt
@@ -1,5 +1,30 @@
 Audio motion visualization can be displayed on the Montage, Watch, and Event pages.
-To do this, install the file "/skins/MySkin/assets/audioMotion-analyzer/src/audioMotion-analyzer.js".
-This file can be downloaded from the following links:
-https://cdn.jsdelivr.net/npm/audiomotion-analyzer@X.X.X where X.X.X is the version number
-https://github.com/hvianna/audioMotion-analyzer/releases
+
+It is drawn by the audioMotion-analyzer library, which ZoneMinder does not ship:
+it is licensed AGPL-3.0-or-later, so it has to be installed by hand. Drop the
+library next to this file, keeping the file name exactly as it is upstream:
+
+  skins/classic/assets/audioMotion-analyzer/src/audioMotion-analyzer.js
+
+(substitute your own skin name for "classic" if you are not using that skin.)
+
+Download it with, where X.X.X is the required version:
+
+  curl -L -o audioMotion-analyzer.js \
+    https://cdn.jsdelivr.net/npm/audiomotion-analyzer@X.X.X/src/audioMotion-analyzer.js
+
+Mind the "/src/audioMotion-analyzer.js" on the end of that URL. Do not use the
+bare https://cdn.jsdelivr.net/npm/audiomotion-analyzer@X.X.X URL: it serves the
+package's "main" entry point, which is the minified UMD bundle (dist/index.js),
+not the ES module this path expects.
+
+The same file is in the upstream source tarball under src/:
+  https://github.com/hvianna/audioMotion-analyzer/releases/tag/X.X.X
+
+The required version is not repeated here, to keep it in one place. It is
+SUPPORTED_AUDIO_MOTION_ANALYZER_VERSION in skins/classic/js/audioMotionAnalyzer.js,
+and the monitor edit page reports, under "Show", which version is required and
+whether the installed one matches.
+
+Note that the npm package is named "audiomotion-analyzer" (all lower case) while
+the project, this directory and the file itself are "audioMotion-analyzer".
diff --git a/web/skins/classic/assets/version b/web/skins/classic/assets/version
index 1585d4ae2..8ef47f7be 100644
--- a/web/skins/classic/assets/version
+++ b/web/skins/classic/assets/version
@@ -14,3 +14,10 @@ https://github.com/john-doherty/swiped-events
 ***********************************
 mb.extruder Oct 24, 2018 with magor changes IgorA100
 https://github.com/pupunzi/jquery.mb.extruder
+***********************************
+audioMotion-analyzer - 4.5.4 (required version, see
+SUPPORTED_AUDIO_MOTION_ANALYZER_VERSION in ../js/audioMotionAnalyzer.js)
+NOT BUNDLED - AGPL-3.0-or-later, installed by the administrator.
+See audioMotion-analyzer/src/help.txt
+https://github.com/hvianna/audioMotion-analyzer
+https://cdn.jsdelivr.net/npm/audiomotion-analyzer@4.5.4/src/audioMotion-analyzer.js