diff --git a/resources/celerity/map.php b/resources/celerity/map.php
--- a/resources/celerity/map.php
+++ b/resources/celerity/map.php
@@ -10,7 +10,7 @@
     'conpherence.pkg.css' => 'a34d59bd',
     'conpherence.pkg.js' => '5f86c17d',
     'core.pkg.css' => '959330a2',
-    'core.pkg.js' => 'e129dcd4',
+    'core.pkg.js' => '5363ae35',
     'darkconsole.pkg.js' => '1f9a31bc',
     'differential.pkg.css' => '90b30783',
     'differential.pkg.js' => 'ddfeb49b',
@@ -19,6 +19,7 @@
     'favicon.ico' => '30672e08',
     'maniphest.pkg.css' => '4845691a',
     'maniphest.pkg.js' => '5ab2753f',
+    'rsrc/audio/basic/tap.mp3' => 'fc2fd796',
     'rsrc/css/aphront/aphront-bars.css' => '231ac33c',
     'rsrc/css/aphront/dark-console.css' => '53798a6d',
     'rsrc/css/aphront/dialog-view.css' => '685c7e2d',
@@ -370,7 +371,7 @@
     'rsrc/js/application/calendar/behavior-event-all-day.js' => 'b41537c9',
     'rsrc/js/application/calendar/behavior-month-view.js' => 'fe33e256',
     'rsrc/js/application/config/behavior-reorder-fields.js' => 'b6993408',
-    'rsrc/js/application/conpherence/ConpherenceThreadManager.js' => 'dd84a70f',
+    'rsrc/js/application/conpherence/ConpherenceThreadManager.js' => '311eae46',
     'rsrc/js/application/conpherence/behavior-conpherence-search.js' => '9bbf3762',
     'rsrc/js/application/conpherence/behavior-durable-column.js' => 'aa3bd034',
     'rsrc/js/application/conpherence/behavior-menu.js' => '80dda04a',
@@ -560,7 +561,7 @@
     'conpherence-message-pane-css' => '14199428',
     'conpherence-notification-css' => 'cef0a3fc',
     'conpherence-participant-pane-css' => '26a3ce56',
-    'conpherence-thread-manager' => 'dd84a70f',
+    'conpherence-thread-manager' => '311eae46',
     'conpherence-transaction-css' => '85129c68',
     'd3' => 'a11a5ff2',
     'differential-changeset-view-css' => '41af6d25',
@@ -1132,6 +1133,17 @@
     '2ee659ce' => array(
       'javelin-install',
     ),
+    '311eae46' => array(
+      'javelin-dom',
+      'javelin-util',
+      'javelin-stratcom',
+      'javelin-install',
+      'javelin-aphlict',
+      'javelin-workflow',
+      'javelin-router',
+      'javelin-behavior-device',
+      'javelin-vector',
+    ),
     '31420f77' => array(
       'javelin-behavior',
     ),
@@ -2095,17 +2107,6 @@
       'javelin-util',
       'phabricator-shaped-request',
     ),
-    'dd84a70f' => array(
-      'javelin-dom',
-      'javelin-util',
-      'javelin-stratcom',
-      'javelin-install',
-      'javelin-aphlict',
-      'javelin-workflow',
-      'javelin-router',
-      'javelin-behavior-device',
-      'javelin-vector',
-    ),
     'de2e896f' => array(
       'javelin-behavior',
       'javelin-dom',
@@ -2376,6 +2377,7 @@
       'javelin-behavior-toggle-class',
       'javelin-behavior-lightbox-attachments',
       'phabricator-busy',
+      'javelin-sound',
       'javelin-aphlict',
       'phabricator-notification',
       'javelin-behavior-aphlict-listen',
diff --git a/resources/celerity/packages.php b/resources/celerity/packages.php
--- a/resources/celerity/packages.php
+++ b/resources/celerity/packages.php
@@ -46,6 +46,7 @@
     'javelin-behavior-toggle-class',
     'javelin-behavior-lightbox-attachments',
     'phabricator-busy',
+    'javelin-sound',
     'javelin-aphlict',
     'phabricator-notification',
     'javelin-behavior-aphlict-listen',
diff --git a/src/applications/conpherence/controller/ConpherenceUpdateController.php b/src/applications/conpherence/controller/ConpherenceUpdateController.php
--- a/src/applications/conpherence/controller/ConpherenceUpdateController.php
+++ b/src/applications/conpherence/controller/ConpherenceUpdateController.php
@@ -546,6 +546,9 @@
     $dropdown_query = id(new AphlictDropdownDataQuery())
       ->setViewer($user);
     $dropdown_query->execute();
+
+    $receive_sound = celerity_get_resource_uri('/rsrc/audio/basic/tap.mp3');
+
     $content = array(
       'non_update' => $non_update,
       'transactions' => hsprintf('%s', $rendered_transactions),
@@ -559,6 +562,9 @@
         $dropdown_query->getNotificationData(),
         $dropdown_query->getConpherenceData(),
       ),
+      'sound' => array(
+        'receive' => $receive_sound,
+      ),
     );
 
     return $content;
diff --git a/webroot/rsrc/audio/basic/tap.mp3 b/webroot/rsrc/audio/basic/tap.mp3
new file mode 100644
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000
GIT binary patch
literal 0
Hc$@<O00001

literal 0
Hc$@<O00001

diff --git a/webroot/rsrc/js/application/conpherence/ConpherenceThreadManager.js b/webroot/rsrc/js/application/conpherence/ConpherenceThreadManager.js
--- a/webroot/rsrc/js/application/conpherence/ConpherenceThreadManager.js
+++ b/webroot/rsrc/js/application/conpherence/ConpherenceThreadManager.js
@@ -313,6 +313,14 @@
 
       this._updating.knownID = r.latest_transaction_id;
       this._latestTransactionID = r.latest_transaction_id;
+
+      JX.Leader.broadcast(
+        'conpherence.message.' + r.latest_transaction_id,
+        {
+          type: 'sound',
+          data: r.sound.receive
+        });
+
       JX.Stratcom.invoke(
         'conpherence-redraw-aphlict',
         null,