Index: src/services/ActivityPubService.js
===================================================================
--- src/services/ActivityPubService.js	(revision 80797d752bc2d91ef2348102b517b288a4132afd)
+++ src/services/ActivityPubService.js	(revision f2eacca5e0a92d8ef8516530c0a23ecd2b0a78ed)
@@ -225,4 +225,23 @@
     for (const m of body.matchAll(/\[\[album:([^\]]+)\]\]/g)) audioLabels.push(m[1].trim());
   } catch { /* non-fatal */ }
+  // fedi_open tracks → real AS2 Audio attachments (the actual file URL, served ungated) so
+  // EVERY client incl. the Mastodon apps plays them inline natively. Gated tracks (default)
+  // stay link/card-only — the file is never exposed for them. Resolve from post.content so a
+  // later body mutation can't affect it.
+  const openAudio = [];
+  if (hadAudio) {
+    const seenA = new Set();
+    const addRow = (r) => {
+      const fn = r.filename || (r.storage_path || '').split('/').pop();
+      if (!fn || seenA.has(fn)) return; seenA.add(fn);
+      openAudio.push({ type: 'Document', mediaType: r.mime_type || 'audio/mpeg', url: `${base}/audio/stream/${encodeURIComponent(fn)}`, name: r.title || 'Audio' });
+    };
+    const SEL = 'SELECT t.title, m.filename, m.storage_path, m.mime_type FROM audio_tracks t JOIN media m ON m.id = t.media_id WHERE t.fedi_open = 1 AND ';
+    try {
+      for (const mm of (post.content || '').matchAll(/\[\[track:([A-Za-z0-9_-]+)\]\]/g)) { const r = db.prepare(SEL + 't.id = ?').get(mm[1]); if (r) addRow(r); }
+      for (const mm of (post.content || '').matchAll(/\[\[album:([^\]]+)\]\]/g)) for (const r of db.prepare(SEL + 't.site_id = ? AND t.album = ? ORDER BY t.rowid').all(site.id, mm[1].trim())) addRow(r);
+      for (const mm of (post.content || '').matchAll(/\[\[playlist:([A-Za-z0-9_-]+)\]\]/g)) for (const r of db.prepare('SELECT t.title, m.filename, m.storage_path, m.mime_type FROM playlist_tracks pt JOIN audio_tracks t ON t.id = pt.track_id JOIN media m ON m.id = t.media_id WHERE t.fedi_open = 1 AND pt.playlist_id = ? ORDER BY pt.position').all(mm[1])) addRow(r);
+    } catch { /* non-fatal */ }
+  }
   body = body.replace(/\[\[(track|album|playlist):[^\]]+\]\]/gi, '');
   // External embeds ([[embed:url]]) → emit the bare URL as a link so Mastodon
@@ -263,4 +282,5 @@
     .filter((u) => { if (seen.has(u)) return false; seen.add(u); return true; })
     .map((u) => ({ type: 'Document', mediaType: mediaType(u), url: u }));
+  for (const a of openAudio) attachment.push(a); // fedi_open tracks → native Audio players
 
   const note = {
Index: src/services/i18n.js
===================================================================
--- src/services/i18n.js	(revision 80797d752bc2d91ef2348102b517b288a4132afd)
+++ src/services/i18n.js	(revision f2eacca5e0a92d8ef8516530c0a23ecd2b0a78ed)
@@ -336,4 +336,6 @@
     'aaud.dl_on': 'Download-voor-email staat AAN — klik om uit te zetten',
     'aaud.dl_off': 'Download-voor-email staat uit — klik om aan te zetten',
+    'aaud.fedi_on': 'Op de fediverse gedeeld (speelt overal inline, bestand downloadbaar) — klik om uit te zetten',
+    'aaud.fedi_off': 'Niet op de fediverse gedeeld (alleen webspeler, bestand verborgen) — klik om te delen',
     'aaud.embed_player': 'Embedbare speler',
     'aaud.embed_hint': 'Plak deze code op je eigen website/blog om je muziek met deze speler in te sluiten:',
@@ -1250,4 +1252,6 @@
     'aaud.dl_on': 'Download-for-email is ON — click to turn off',
     'aaud.dl_off': 'Download-for-email is off — click to turn on',
+    'aaud.fedi_on': 'Shared on the fediverse (plays inline everywhere, file downloadable) — click to turn off',
+    'aaud.fedi_off': 'Not shared on the fediverse (web player only, file hidden) — click to share',
     'aaud.embed_player': 'Embeddable player',
     'aaud.embed_hint': 'Paste this code on your own website/blog to embed your music with this player:',
@@ -2163,4 +2167,6 @@
     'aaud.dl_on': 'Download-für-E-Mail ist AN — zum Ausschalten klicken',
     'aaud.dl_off': 'Download-für-E-Mail ist aus — zum Einschalten klicken',
+    'aaud.fedi_on': 'Im Fediverse geteilt (spielt überall inline, Datei herunterladbar) — zum Ausschalten klicken',
+    'aaud.fedi_off': 'Nicht im Fediverse geteilt (nur Web-Player, Datei verborgen) — zum Teilen klicken',
     'aaud.embed_player': 'Einbettbarer Player',
     'aaud.embed_hint': 'Füge diesen Code auf deiner eigenen Website/deinem Blog ein, um deine Musik mit diesem Player einzubetten:',