Index: src/routes/posts.js
===================================================================
--- src/routes/posts.js	(revision ca25f360f73b889318b921f39ff70bb54eb6d853)
+++ src/routes/posts.js	(revision 75bda38ace3a3eff7e9ea9d7676a2ad33a8ad24c)
@@ -848,4 +848,5 @@
     canManageSite,
     siteAvatar,
+    postHasPlayableAudio: ActivityPubService.hasPlayableAudio(post.content || '', site.id),
     pageTitle: post.title + ' - ' + site.title,
     socialDescr: post.excerpt || '',