diff --git a/assets/js/creations/pattern/pattern_audio.js b/assets/js/creations/pattern/pattern_audio.js
index cfccf789..792baec7 100755
--- a/assets/js/creations/pattern/pattern_audio.js
+++ b/assets/js/creations/pattern/pattern_audio.js
@@ -525,6 +525,13 @@ function bufferToWave(abuffer) {
 // ===============================
 
 const LMMS_TICKS_PER_STEP = 12;
+
+function ticksToSec(ticks, stepIntervalSec) {
+  // stepIntervalSec = duração de 1 step (1/16) em segundos
+  // LMMS_TICKS_PER_STEP = 12 ticks por 1/16 (porque 48 ticks por semínima e 192 por compasso em 4/4)
+  return (Number(ticks) / LMMS_TICKS_PER_STEP) * stepIntervalSec;
+}
+
 let songPatternScheduleId = null;
 
 export function startSongPatternPlaybackOnTransport() {
@@ -596,10 +603,10 @@ export function startSongPatternPlaybackOnTransport() {
             const durSec = Math.max(0.01, ticksToSec(lenTicks, stepIntervalSec));
 
             const vel = Math.max(0, Math.min(1, (Number(n.vol) || 100) / 100));
-            const noteName = midiToNoteName(n.key);
+            const freq = Tone.Frequency(Number(n.key) || 0, "midi").toFrequency();
 
             try {
-              track.instrument.triggerAttackRelease(noteName, durSec, t2, vel);
+              track.instrument.triggerAttackRelease(freq, durSec, t2, vel);
             } catch {
               try {
                 track.instrument.triggerAttackRelease(noteName, durSec, t2);
@@ -642,14 +649,12 @@ export function startSongPatternPlaybackOnTransport() {
 
         if (patt.steps[stepInPattern]) {
           if (track.type === "sampler" && track.player) {
-            track.player.restart = true;
-            try { 
-              // Verifica se já está tocando. Se sim, para imediatamente antes de recomeçar.
-              if (track.player.state === "started") {
-                  track.player.stop(time);
-              }
-              track.player.start(time); }
-              catch {}
+            if (track.type === "sampler" && track.player) {
+              try {
+                if (track.player.state === "started") track.player.stop(time);
+                track.player.start(time);
+              } catch {}
+            }
           } else if (track.type === "plugin" && track.instrument) {
             // plugin sem piano roll
             try { track.instrument.triggerAttackRelease("C5", "16n", time); } catch {}