diff --git a/app/static/js/services/soundfontPlayer.js b/app/static/js/services/soundfontPlayer.js
index 60dd5e2..a6c451e 100644
--- a/app/static/js/services/soundfontPlayer.js
+++ b/app/static/js/services/soundfontPlayer.js
@@ -172,8 +172,12 @@
         playNote: function (note, velocity, durationMs, startTime, program, destinationNode, channel, synthEngine) {
             if (_initialized && _synthInstance && _currentSfId) {
                 return this._playNoteSpessa(note, velocity, durationMs, startTime, program, channel, synthEngine);
+            } else {
+                if (_initialized && _synthInstance && !_currentSfId) {
+                    console.warn("[SonicSF] No sound bank loaded, using oscillator fallback");
+                }
+                return this._playNoteOsc(note, velocity, durationMs, startTime, program, destinationNode, channel, synthEngine);
             }
-            return this._playNoteOsc(note, velocity, durationMs, startTime, program, destinationNode, channel, synthEngine);
         },
 
         _playNoteSpessa: function (note, velocity, durationMs, startTime, program, channel, synthEngine) {
@@ -198,7 +202,10 @@
                 try {
                     _synthInstance.noteOn(channel, midiPitch, midiVel);
                     setTimeout(() => { try { _synthInstance.noteOff(channel, midiPitch); } catch (e) {} }, durSec * 1000);
-                } catch (e) {}
+                } catch (e) {
+                    console.warn("[SonicSF] SpessaSynth noteOn failed, falling back to oscillator:", e);
+                    this._playNoteOsc(note, velocity, durationMs, startTime, program, null, channel, synthEngine);
+                }
             };
             if (scheduledTime > 0) setTimeout(doNoteOn, scheduledTime * 1000); else doNoteOn();
         },