diff --git a/js/MIDI/Plugin.js b/js/MIDI/Plugin.js
index 7647f965..015c205e 100644
--- a/js/MIDI/Plugin.js
+++ b/js/MIDI/Plugin.js
@@ -246,9 +246,14 @@ if (window.AudioContext || window.webkitAudioContext) (function () {
             // @Miranet: "the values of 0.2 and 0.3 could ofcourse be used as
             // a 'release' parameter for ADSR like time settings."
             // add { "metadata": { release: 0.3 } } to soundfont files
-            sources[source].gain.linearRampToValueAtTime(1, delay);
-            sources[source].gain.linearRampToValueAtTime(0, delay + 0.2);
-            sources[source].noteOff(delay + 0.3);
+	    sources[source].gainNode.gain.linearRampToValueAtTime(1, delay);
+	    sources[source].gainNode.gain.linearRampToValueAtTime(0, delay + 0.2);
+	    if (source.noteOff) { // old api
+		sources[source].noteOff(delay + 0.3);
+	    } else { // new api
+		sources[source].stop(delay + 0.3);
+	    }
+
             delete sources[source];
         }
     };