mirceapricop/LICENSE.txt

## README.md

      
    Raw
  

              README.md
            
          
    Square Wave Synthesizer 140byt.es

Generates and plays a square wave with custom duration and pitch.
Usage

synth(duration, inv_pitch, "");

Duration is approximately in microseconds (though not exact)
The higher the inv_pitch argument, the lower the sound sounds
Duration MUST be of the form 4x+2 (e.g. 4250+2 = 1002)
inv_pitch SHOULD be divisible by 2

WAV header was prepared with riffwave
See the demo here
For more information

See the 140byt.es site for a showcase of entries (built itself using 140-byte entries!), and follow @140bytes on Twitter.
To learn about byte-saving hacks for your own code, or to contribute what you've learned, head to the wiki.
140byt.es is brought to you by Jed Schmidt, with help from Alex Kloss. It was inspired by work from Thomas Fuchs and Dustin Diaz.

  
## annotated.js
// This works by generating the dataURI for an Audio tag.
function(i,   // How many characters we will put after the header
         m,   // How often we switch the signal value (basically, inverse frequency)
         h) { // Used to build the sound data
  while(i--)
    h+= i%m > m/2 ? 0 : 9;  // We alternate between two values (square wave) every m/2 step
                            // Example for m=4 => 00990099..
  // Generate the Audio and play it
  // Works in FF and Chrome
  new Audio("data:audio/wav;base64,UklGRjQnAABXQVZFZm10IBAAAAABAAEAQB8AAEAfAAABAAgAZGF0YQ"+h).play()
}

## index.js
function(i,m,h){while(i--)h+=i%m>m/2?0:9;new Audio("data:audio/wav;base64,UklGRjQnAABXQVZFZm10IBAAAAABAAEAQB8AAEAfAAABAAgAZGF0YQ"+h).play()}

## LICENSE.txt
            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
                    Version 2, December 2004

 Copyright (C) 2011 YOUR_NAME_HERE <YOUR_URL_HERE>

 Everyone is permitted to copy and distribute verbatim or modified
 copies of this license document, and changing it is allowed as long
 as the name is changed.

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

  0. You just DO WHAT THE FUCK YOU WANT TO.

## package.json
{
  "name": "squareSynth",

  "description": "Generates and plays a square wave with custom duration and pitch.",

  "keywords": [
    "generate",
    "sound",
    "wave"
  ]
}

## test.html
<!DOCTYPE html>
<html>
<head>
  <title>Square Wave Piano</title>
  <script>

    var synth = function(i,m,h){while(i--)h+=i%m>m/2?0:9;new Audio("data:audio/wav;base64,UklGRjQnAABXQVZFZm10IBAAAAABAAEAQB8AAEAfAAABAAgAZGF0YQ"+h).play()}

    function playnote(i) {
      synth(3002,i*10,"");
      if(down_keys[i] == true) {
        setTimeout(function(){
          playnote(i)
        }, 200);
        } else {
        return;
      }
    }

    var down_keys = new Array(10);

    document.onkeydown = function(e) {
      var key = e.keyCode - 48;
      if(key < 0 || key > 9) return;
      key = 10-key; // Reverse them for regular piano intuition.
      if(down_keys[key] == null || down_keys[key] == false) {
        down_keys[key] = true;
        playnote(key);
        document.body.style.background = "#"+Math.round(0xffffff * Math.random()).toString(16);
      }
    }

    document.onkeyup = function(e) {
      var key = 10 - (e.keyCode - 48);
      down_keys[key] = false;
    }

  </script>
</head>
<body>
  <h2>Use the number keys to play.</h2>
  <h3>It sounds awesome when you press more at the same time.</h3>
  <h4>It doesn't sound so awesome when you keep them pressed for
    long.</h4>
</body>
</html>
	// This works by generating the dataURI for an Audio tag.
	function(i, // How many characters we will put after the header
	m, // How often we switch the signal value (basically, inverse frequency)
	h) { // Used to build the sound data
	while(i--)
	h+= i%m > m/2 ? 0 : 9; // We alternate between two values (square wave) every m/2 step
	// Example for m=4 => 00990099..
	// Generate the Audio and play it
	// Works in FF and Chrome
	new Audio("data:audio/wav;base64,UklGRjQnAABXQVZFZm10IBAAAAABAAEAQB8AAEAfAAABAAgAZGF0YQ"+h).play()
	}
	DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
	Version 2, December 2004

	Copyright (C) 2011 YOUR_NAME_HERE <YOUR_URL_HERE>

	Everyone is permitted to copy and distribute verbatim or modified
	copies of this license document, and changing it is allowed as long
	as the name is changed.

	DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
	TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

	0. You just DO WHAT THE FUCK YOU WANT TO.
	{
	"name": "squareSynth",

	"description": "Generates and plays a square wave with custom duration and pitch.",

	"keywords": [
	"generate",
	"sound",
	"wave"
	]
	}
	<!DOCTYPE html>
	<html>
	<head>
	<title>Square Wave Piano</title>
	<script>

	var synth = function(i,m,h){while(i--)h+=i%m>m/2?0:9;new Audio("data:audio/wav;base64,UklGRjQnAABXQVZFZm10IBAAAAABAAEAQB8AAEAfAAABAAgAZGF0YQ"+h).play()}

	function playnote(i) {
	synth(3002,i*10,"");
	if(down_keys[i] == true) {
	setTimeout(function(){
	playnote(i)
	}, 200);
	} else {
	return;
	}
	}

	var down_keys = new Array(10);

	document.onkeydown = function(e) {
	var key = e.keyCode - 48;
	if(key < 0 \|\| key > 9) return;
	key = 10-key; // Reverse them for regular piano intuition.
	if(down_keys[key] == null \|\| down_keys[key] == false) {
	down_keys[key] = true;
	playnote(key);
	document.body.style.background = "#"+Math.round(0xffffff * Math.random()).toString(16);
	}
	}

	document.onkeyup = function(e) {
	var key = 10 - (e.keyCode - 48);
	down_keys[key] = false;
	}

	</script>
	</head>
	<body>
	<h2>Use the number keys to play.</h2>
	<h3>It sounds awesome when you press more at the same time.</h3>
	<h4>It doesn't sound so awesome when you keep them pressed for
	long.</h4>
	</body>
	</html>