diff --git a/app/static/js/services/soundfontPlayer.js b/app/static/js/services/soundfontPlayer.js
index c3c60a6..07d181e 100644
--- a/app/static/js/services/soundfontPlayer.js
+++ b/app/static/js/services/soundfontPlayer.js
@@ -159,13 +159,18 @@
             }
             if (channel === undefined) channel = 0;
             const durSec = durationMs / 1000;
-            try {
-                _synthInstance.noteOn(channel, midiPitch, midiVel);
-                setTimeout(() => { try { _synthInstance.noteOff(channel, midiPitch); } catch (e) {} }, durSec * 1000);
-            } catch (e) {
-                console.warn("[SonicSF] SpessaSynth noteOn error, oscillator fallback:", e);
-                this._playNoteOsc(note, velocity, durationMs, startTime, program, null, channel, synthEngine);
-            }
+            const now = ctx.currentTime;
+            const delay = (typeof startTime === 'number' && startTime > now) ? (startTime - now) : 0;
+            const doNote = () => {
+                try {
+                    _synthInstance.noteOn(channel, midiPitch, midiVel);
+                    setTimeout(() => { try { _synthInstance.noteOff(channel, midiPitch); } catch (e) {} }, durSec * 1000);
+                } catch (e) {
+                    console.warn("[SonicSF] SpessaSynth noteOn error:", e);
+                    this._playNoteOsc(note, velocity, durationMs, startTime, program, null, channel, synthEngine);
+                }
+            };
+            if (delay > 0) setTimeout(doNote, delay * 1000); else doNote();
         },
 
         _playNoteOsc: function (note, velocity, durationMs, startTime, program, destinationNode, channel, synthEngine) {