samples de áudio não reiniciavam ao fim da playlist

assets/js/creations/pattern/pattern_audio.js

@@ -34,6 +34,29 @@ const timerDisplay = document.getElementById("timer-display");
 // Variável para armazenar as "Parts" (sequências melódicas) do Tone.js
 let activeParts = [];
 
+// =====================================================
+// Proteção: não “vazar” loop do Pattern Editor pro Song
+// =====================================================
+let _transportLoopSnapshot = null;
+
+function snapshotTransportLoopOnce() {
+  if (_transportLoopSnapshot) return;
+  _transportLoopSnapshot = {
+    loop: Tone.Transport.loop,
+    loopStart: Tone.Transport.loopStart,
+    loopEnd: Tone.Transport.loopEnd,
+  };
+}
+
+function restoreTransportLoop() {
+  if (!_transportLoopSnapshot) return;
+  Tone.Transport.loop = _transportLoopSnapshot.loop;
+  Tone.Transport.loopStart = _transportLoopSnapshot.loopStart;
+  Tone.Transport.loopEnd = _transportLoopSnapshot.loopEnd;
+  _transportLoopSnapshot = null;
+}
+
+
 let currentStep = 0;
 
 function updateStepHighlight(step) {
@@ -182,6 +205,7 @@ export function stopPlayback(rewind = true) {
   Tone.Transport.stop();
   Tone.Transport.cancel();
   stopScheduledPianoRoll();
+  restoreTransportLoop();
 
   // ✅ Pattern Editor: para apenas o preview (não mexe no track.player da playlist)
   appState.pattern.tracks.forEach((track) => {
@@ -255,6 +279,8 @@ export function schedulePianoRoll() {
     barsInput.dispatchEvent(new Event("input", { bubbles: true }));
   }
 
+  snapshotTransportLoopOnce();
+
   Tone.Transport.loop = true;
   Tone.Transport.loopStart = 0;
   Tone.Transport.loopEnd = `${barsNeeded}m`;