diff --git a/assets/js/creations/pattern/pattern_audio.js b/assets/js/creations/pattern/pattern_audio.js
index bab7bbf4..5319b554 100755
--- a/assets/js/creations/pattern/pattern_audio.js
+++ b/assets/js/creations/pattern/pattern_audio.js
@@ -211,7 +211,7 @@ function getSongInstrument(track, patternIndex) {
   }
 
   const mix = refreshSongMixFor(track, patternIndex);
-  const inst = new Cls(null, track.params || track.pluginData || {});
+  const inst = new Cls(Tone.getContext(), track.params || track.pluginData || {});
   inst.connect(mix.instVol);
 
   track._songInstrument[patternIndex] = inst;
@@ -1058,7 +1058,10 @@ export async function renderProjectToBlob({ tailSec = 0.25 } = {}) {
     transport.bpm.value = bpm;
 
     const rawCtx = Tone.getContext().rawContext;
-    const master = new Tone.Gain(1).toDestination();
+
+    // ✅ master no OFFLINE e conectando explicitamente no destination do OFFLINE
+    const master = new Tone.Gain(1);
+    master.connect(rawCtx.destination);
 
     // ------------------------------------------------------------
     // CACHE de buffers (para não baixar/decodificar repetido)