diff --git a/CHANGELOG.md b/CHANGELOG.md
index 30a29e9..a2c0d77 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,8 @@ Follows [Keep a Changelog](https://keepachangelog.com/en/1.0.0/) · versioned wi
 ## [Unreleased]
 
 ### Changed
+- **STT namespace migration.** STT backend selection, microphone recording, voice loading, and STT-to-TTS helpers now
+  use a private scope with live compatibility accessors and a `window.TTVC.stt` API.
 - **AI-backend namespace migration.** LLM snippets and backend interaction controls now live behind a private section scope
   with an explicit `window.TTVC.aiBackends` API for cross-module snippet initialization.
 - **Integrations namespace migration.** Endpoint helpers, active-voice listings, virtual design IDs, and API snippet
diff --git a/VERSION b/VERSION
index 8a71c6f..da128ef 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.24.82
+1.24.83
diff --git a/docs/ARCHITECTURE.md b/docs/ARCHITECTURE.md
index 45efd5e..560237b 100644
--- a/docs/ARCHITECTURE.md
+++ b/docs/ARCHITECTURE.md
@@ -72,6 +72,7 @@ Done incrementally as global-scope ordered files (no ES-module change needed) 
 - ✅ Combined library production rendering and Reader/Rehearser handoffs use a private scope with an explicit namespace API.
 - ✅ Integration endpoint and API-snippet helpers use a private scope with explicit voice/endpoint compatibility exports.
 - ✅ AI-backend section interactions and snippet initialization use a private scope with an explicit namespace API.
+- ✅ STT backend, recording, voice-loading, and STT-to-TTS helpers use a private scope with live compatibility accessors.
 - ✅ `static/css/resource-diagnostics.css` — isolated Performance/resource diagnostic panel styles.
 - ✅ `static/css/background-jobs.css` — isolated background-job history and retry-panel styles.
 - ✅ `static/css/voice-design.css` — isolated Voice Design form, samples, and preview-match styles.
diff --git a/static/index.html b/static/index.html
index 58ec48a..f372145 100644
--- a/static/index.html
+++ b/static/index.html
@@ -10,7 +10,7 @@
   <meta name="format-detection" content="telephone=no">
   <meta name="color-scheme" content="light dark">
   <meta name="theme-color" content="#2563EB">
-  <meta name="app-version" content="1.24.82">
+  <meta name="app-version" content="1.24.83">
   <link rel="manifest" href="/manifest.webmanifest">
   <link rel="icon" href="/static/icon.svg" type="image/svg+xml">
   <link rel="apple-touch-icon" href="/static/icon.svg">
@@ -27,12 +27,12 @@
 
   <!-- ── Core styles (local — no CDN dependency for first paint) ────────── -->
   <link rel="stylesheet" href="/static/vendor/mdi/materialdesignicons.min.css">
-  <link rel="stylesheet" href="/static/style.css?v=1.24.82">
-  <link rel="stylesheet" href="/static/css/resource-diagnostics.css?v=1.24.82">
-  <link rel="stylesheet" href="/static/css/background-jobs.css?v=1.24.82">
-  <link rel="stylesheet" href="/static/css/voice-design.css?v=1.24.82">
-  <link rel="stylesheet" href="/static/css/rehearser.css?v=1.24.82">
-  <link rel="stylesheet" href="/static/css/audiobook.css?v=1.24.82">
+  <link rel="stylesheet" href="/static/style.css?v=1.24.83">
+  <link rel="stylesheet" href="/static/css/resource-diagnostics.css?v=1.24.83">
+  <link rel="stylesheet" href="/static/css/background-jobs.css?v=1.24.83">
+  <link rel="stylesheet" href="/static/css/voice-design.css?v=1.24.83">
+  <link rel="stylesheet" href="/static/css/rehearser.css?v=1.24.83">
+  <link rel="stylesheet" href="/static/css/audiobook.css?v=1.24.83">
 
 
   <!-- ── Flag icons — non-blocking (loaded async, icons appear after JS) ── -->
@@ -397,7 +397,7 @@ window.toggleNavTree = function(treeId, chevronId) {
 </script>
 
 <!-- loader.js: fetches sections → loads JS modules → removes skeleton -->
-<script src="/static/loader.js?v=1.24.82"></script>
+<script src="/static/loader.js?v=1.24.83"></script>
 
 </body>
 </html>
diff --git a/static/js/stt.js b/static/js/stt.js
index 0cd3d57..0f716b9 100644
--- a/static/js/stt.js
+++ b/static/js/stt.js
@@ -1,5 +1,7 @@
 // ── STT -> TTS ───────────────────────────────────────────────────────────
 
+(function (root) {
+
 let sttTtsSourceId = null;
 let sttTtsOutputBlob = null;
 let _sttBackends = [];
@@ -288,3 +290,20 @@ $('stt-tts-save-wav-btn')?.addEventListener('click', () => {
   sttTtsDownload(sttTtsOutputBlob, ($('stt-tts-voice-select').value || 'stt_tts') + '_stt_tts.wav');
 });
 
+Object.assign(root, {
+  sttTtsSourceId, sttTtsOutputBlob, _sttBackends, sttTtsRecorder,
+  sttTtsRecordStream, sttTtsRecordChunks, sttTtsRecordTimer, sttTtsRecordSecs,
+  sttTtsSelectedSttBackend, sttBackendOptionHtml, updateSttBackendHelp,
+  refreshSttBackends, sttTtsSelectedBackend, sttTtsDownload, sttTtsUploadFile,
+  sttTtsFetchVoices, sttTtsSetRecording, sttTtsStopTracks,
+});
+Object.defineProperty(root, '_sttBackends', { configurable: true, get: () => _sttBackends, set: v => { _sttBackends = v; } });
+root.TTVC = root.TTVC || {};
+root.TTVC.stt = root.TTVC.stt || {};
+Object.assign(root.TTVC.stt, {
+  get backends() { return _sttBackends; },
+  refresh: refreshSttBackends,
+  fetchVoices: sttTtsFetchVoices,
+  upload: sttTtsUploadFile,
+});
+})(window);