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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>                    

Output:

Supported Browsers: The browser supported by AudioNode.numberOfOutputs property are listed below:

  • Google Chrome 14.0
  • Edge 12.0
  • Firefox 25.0
  • Safari 6.0
  • Opera 15.0

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