Web Audio API | AudioNode numberOfOutputs property

Last Updated : 19 Jul, 2019

The AudioNode.numberOfOutputs property is used to return the number of outputs which are coming from nodes. The value of destination node AudioDestinationNode is 0 for this attribute.

Syntax:

var numOutputs = audioNode.numberOfOutputs;

Return Value: It returns an integer value greater than equal to zero.

Example 1:

<!DOCTYPE HTML>  
<html>  
  
<head>  
    <title>  
        Web Audio API | AudioNode numberOfOutputs property 
    </title> 
</head>  
  
<body>  
      
    <h1 style = "color:green;" >  
        GeeksforGeeks 
    </h1> 
      
    <h2> 
        AudioNode numberOfOutputs property 
    </h2> 
      
    <script> 
      
        // Create new Audio context 
        const audioContext = new AudioContext(); 
          
        // Create an OscillatorNode  
        const oscillator = audioContext.createOscillator(); 
        const gainNode = audioContext.createGain(); 
           
        oscillator.connect(gainNode).connect(audioContext.destination); 
          
        // Display the numberOfOutputs in console view 
        console.log(oscillator.numberOfOutputs); 
    </script> 
</body> 
  
</html>                     

Output:

Example 2:

<!DOCTYPE HTML>  
<html>  
   
<head>  
    <title>  
        Web Audio API | AudioNode numberOfOutputs property 
    </title> 
</head>  
   
<body>  
       
    <h1 style = "color:green;" >  
        GeeksforGeeks 
    </h1> 
       
    <h2> 
        AudioNode numberOfOutputs property 
    </h2> 
       
    <script> 
       
        // Create new Audio context 
        const audioContext = new AudioContext(); 
           
        // Create an OscillatorNode  
        const oscillator = audioContext.createOscillator(); 
        const gainNode = audioContext.createGain(); 
            
        oscillator.connect(gainNode).connect(audioContext.destination); 
           
        // Display the numberOfOutputs in console view 
        console.log(gainNode.numberOfOutputs); 
    </script> 
</body> 
   
</html>                    

Output:

Example 3:

<!DOCTYPE HTML>  
<html>  
  
<head>  
    <title>  
        Web Audio API | AudioNode numberOfOutputs property 
    </title> 
</head>  
  
<body>  
      
    <h1 style = "color:green;" >  
        GeeksforGeeks 
    </h1> 
      
    <h2> 
        AudioNode numberOfOutputs property 
    </h2> 
      
    <script> 
      
        // Create new Audio context 
        const audioContext = new AudioContext(); 
          
        // Create an OscillatorNode  
        const oscillator = audioContext.createOscillator(); 
        const gainNode = audioContext.createGain(); 
           
        oscillator.connect(gainNode).connect(audioContext.destination); 
          
        // Display the numberOfOutputs in console view 
        console.log(audioContext.destination.numberOfOutputs); 
    </script> 
</body> 
  
</html>                     