diff --git a/js/sound/TonePlayer.js b/js/sound/TonePlayer.js
index a4ec8b4..8085d96 100644
--- a/js/sound/TonePlayer.js
+++ b/js/sound/TonePlayer.js
@@ -266,7 +266,7 @@ export class TonePlayer extends SoundPlayer
 		if (this._soundLibrary === TonePlayer.SoundLibrary.TONE_JS)
 		{
 			// trigger the release of the sound, immediately:
-			this._synth.triggerRelease();
+			this._synth.triggerRelease(this._note);
 
 			// clear the repeat event if need be:
 			if (this._toneId)