fixed bug

src/nodes/audio.js

@@ -968,6 +968,67 @@ LGAudioMixer.desc = "Audio mixer";
 LiteGraph.registerNodeType("audio/mixer", LGAudioMixer);
 
 
+function LGAudioADSR()
+{
+	//default 
+	this.properties = {
+		A: 0.1,
+		D: 0.1,
+		S: 0.1,
+		R: 0.1
+	};
+
+	this.audionode = LGAudio.getAudioContext().createGain();
+	this.audionode.gain.value = 0;
+	this.addInput("in","audio");
+	this.addInput("gate","bool");
+	this.addOutput("out","audio");
+	this.gate = false;
+}
+
+LGAudioADSR.prototype.onExecute = function()
+{
+	var audioContext = LGAudio.getAudioContext();
+	var now = audioContext.currentTime;
+	var node = this.audionode;
+	var gain = node.gain;
+	var current_gate = this.getInputData(1);
+
+	var A = this.getInputOrProperty("A");
+	var D = this.getInputOrProperty("D");
+	var S = this.getInputOrProperty("S");
+	var R = this.getInputOrProperty("R");
+
+	if( !this.gate && current_gate )
+	{
+		gain.cancelScheduledValues(0);
+		gain.setValueAtTime( 0, now );
+		gain.linearRampToValueAtTime(1, now + A );
+		gain.linearRampToValueAtTime(S, now + A + D );
+	}
+	else if( this.gate && !current_gate )
+	{
+		gain.cancelScheduledValues( 0 );
+		gain.setValueAtTime( gain.value, now );
+		gain.linearRampToValueAtTime( 0, now + R );
+	}
+
+	this.gate = current_gate;
+}
+
+LGAudioADSR.prototype.onGetInputs = function()
+{
+	return [["A","number"],["D","number"],["S","number"],["R","number"]];
+}
+
+
+LGAudio.createAudioNodeWrapper( LGAudioADSR );
+
+LGAudioADSR.title = "ADSR";
+LGAudioADSR.desc = "Audio envelope";
+LiteGraph.registerNodeType("audio/adsr", LGAudioADSR);
+
+
 function LGAudioDelay()
 {
 	//default 
@@ -1066,7 +1127,13 @@ LGAudioOscillatorNode.prototype.onStart = function()
 	if(!this.audionode.started)
 	{
 		this.audionode.started = true;
-		this.audionode.start();
+		try
+		{
+			this.audionode.start();
+		}
+		catch (err)
+		{
+		}
 	}
 }