diff --git a/backend/novasonic-server.js b/backend/novasonic-server.js
index 0e836f6..8413383 100644
--- a/backend/novasonic-server.js
+++ b/backend/novasonic-server.js
@@ -245,8 +245,15 @@ async function downloadTrack({ jobId, artist, albumArtist, title, album, year, t
     );
   });
 
-  const hasAudio = () => fs.readdirSync(dir).some(f => AUDIO_EXTS.some(e => f.endsWith(`.${e}`)));
   const ytmUrl = `https://music.youtube.com/search?q=${encodeURIComponent(query)}`;
+  // Snapshot files already in dir before we start — so hasAudio() only detects NEW files
+  // from the current download attempt, not pre-existing files from parallel jobs.
+  let snapBefore = new Set(fs.readdirSync(dir));
+  const resetSnap = () => { snapBefore = new Set(fs.readdirSync(dir)); };
+  const hasAudio  = () => fs.readdirSync(dir).some(
+    f => !snapBefore.has(f) && AUDIO_EXTS.some(e => f.endsWith(`.${e}`))
+  );
+  const tryYtdlp  = async (args) => { resetSnap(); await spawnYtdlp(args); };
 
   const uploaderWord   = artistFilterWord(mainArtist);
   const variantFilter  = buildVariantFilter(title);
@@ -268,60 +275,60 @@ async function downloadTrack({ jobId, artist, albumArtist, title, album, year, t
 
     log(jobId, `🔍 Suche YT Music (~${durationSec}s ±${margin}s): "${query}"`);
     // 1. YTM — Dauer + Artist + Varianten-Filter (streng)
-    await spawnYtdlp([ytmUrl, '--playlist-items', '1', ...mf(dur, true, true), ...baseArgs]);
+    await tryYtdlp([ytmUrl, '--playlist-items', '1', ...mf(dur, true, true), ...baseArgs]);
 
     if (!hasAudio()) {
       // 2. YT — Dauer + Artist + Varianten-Filter
       log(jobId, '⚠️  Kein YTM-Treffer — Fallback zu YouTube…');
-      await spawnYtdlp([`ytsearch1:${query}`, ...mf(dur, true, true), ...baseArgs]);
+      await tryYtdlp([`ytsearch1:${query}`, ...mf(dur, true, true), ...baseArgs]);
     }
     if (!hasAudio()) {
       // 3. YTM — Dauer + Varianten-Filter (kein Artist)
       log(jobId, '⚠️  Kein Treffer mit Artist-Filter — ohne Artist…');
-      await spawnYtdlp([ytmUrl, '--playlist-items', '1', ...mf(dur, false, true), ...baseArgs]);
+      await tryYtdlp([ytmUrl, '--playlist-items', '1', ...mf(dur, false, true), ...baseArgs]);
     }
     if (!hasAudio()) {
       // 4. YT — Dauer + Varianten-Filter
-      await spawnYtdlp([`ytsearch1:${query}`, ...mf(dur, false, true), ...baseArgs]);
+      await tryYtdlp([`ytsearch1:${query}`, ...mf(dur, false, true), ...baseArgs]);
     }
     if (!hasAudio()) {
       // 5. YTM — nur Varianten-Filter (kein Dauer-Check)
       log(jobId, '⚠️  Kein Treffer im Dauerbereich — suche ohne Dauerbeschränkung…');
-      await spawnYtdlp([ytmUrl, '--playlist-items', '1', ...mf(null, false, true), ...baseArgs]);
+      await tryYtdlp([ytmUrl, '--playlist-items', '1', ...mf(null, false, true), ...baseArgs]);
     }
     if (!hasAudio()) {
       // 6. YT — nur Varianten-Filter
-      await spawnYtdlp([`ytsearch1:${query}`, ...mf(null, false, true), ...baseArgs]);
+      await tryYtdlp([`ytsearch1:${query}`, ...mf(null, false, true), ...baseArgs]);
     }
     if (!hasAudio()) {
       // 7+8. Letzter Ausweg: komplett ungefiltert
       log(jobId, '⚠️  Letzter Versuch: keine Filter…');
-      await spawnYtdlp([ytmUrl, '--playlist-items', '1', ...baseArgs]);
+      await tryYtdlp([ytmUrl, '--playlist-items', '1', ...baseArgs]);
     }
     if (!hasAudio()) {
-      await spawnYtdlp([`ytsearch1:${query}`, ...baseArgs]);
+      await tryYtdlp([`ytsearch1:${query}`, ...baseArgs]);
     }
   } else {
     log(jobId, `🔍 Suche YT Music: "${query}"`);
     // Ohne Dauer: Artist + Varianten → ohne Artist → ohne alles
-    await spawnYtdlp([ytmUrl, '--playlist-items', '1', ...mf(null, true, true), ...baseArgs]);
+    await tryYtdlp([ytmUrl, '--playlist-items', '1', ...mf(null, true, true), ...baseArgs]);
 
     if (!hasAudio()) {
-      await spawnYtdlp([`ytsearch1:${query}`, ...mf(null, true, true), ...baseArgs]);
+      await tryYtdlp([`ytsearch1:${query}`, ...mf(null, true, true), ...baseArgs]);
     }
     if (!hasAudio()) {
       log(jobId, '⚠️  Kein Treffer mit Artist — ohne Artist-Filter…');
-      await spawnYtdlp([ytmUrl, '--playlist-items', '1', ...mf(null, false, true), ...baseArgs]);
+      await tryYtdlp([ytmUrl, '--playlist-items', '1', ...mf(null, false, true), ...baseArgs]);
     }
     if (!hasAudio()) {
-      await spawnYtdlp([`ytsearch1:${query}`, ...mf(null, false, true), ...baseArgs]);
+      await tryYtdlp([`ytsearch1:${query}`, ...mf(null, false, true), ...baseArgs]);
     }
     if (!hasAudio()) {
       log(jobId, '⚠️  Letzter Versuch: keine Filter…');
-      await spawnYtdlp([ytmUrl, '--playlist-items', '1', ...baseArgs]);
+      await tryYtdlp([ytmUrl, '--playlist-items', '1', ...baseArgs]);
     }
     if (!hasAudio()) {
-      await spawnYtdlp([`ytsearch1:${query}`, ...baseArgs]);
+      await tryYtdlp([`ytsearch1:${query}`, ...baseArgs]);
     }
   }