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854byte synth 854byte synth - No HTML or CSS is needed. Everything is rendered by Javascript. // source http://jsbin.com/qecemepuzi
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta name="description" content="854byte synth - No HTML or CSS is needed. Everything is rendered by Javascript."> | |
| <meta charset="utf-8"> | |
| <meta name="viewport" content="width=device-width"> | |
| <title>854byte synth</title> | |
| </head> | |
| <body> | |
| <h1>854byte synth</h1> | |
| <p>No HTML or CSS is needed. Everything is rendered by Javascript.</p> | |
| <a href="http://closure-compiler.appspot.com/code/jsc69623bc0dd0390c015615586a1b18cac/default.js">minified source</a> made by <a href="http://twitter.com-reimertz"> reimertz</a> | |
| <script id="jsbin-javascript"> | |
| // ==ClosureCompiler== | |
| // @output_file_name default.js | |
| // @compilation_level ADVANCED_OPTIMIZATIONS | |
| // ==/ClosureCompiler== | |
| var d=document;d.body.innerHTML += '<p id="p"></p><style>#p{display:flex;flex-direction:row}#p>*{align-items:flex-end;justify-content:center;display:flex;padding-bottom:5px;width:50px;height:100px;color:#000;background:#fea;border-right:1px solid #fff;opacity:.8}#p>[class$="_"]{color:#fff;background:#000;position:absolute;height:50px;margin-left:-25px;z-index:1}[s*="t"]{opacity:1; margin-top: 25px;}</style>'; | |
| var piano = d.querySelector('#p'), | |
| hzMap = [], | |
| noteMap = ['c','c_','d','d_','e','f','f_','g','g_','a','a_','b'], | |
| keyMap = ['q','2','w','3','e','r','5','t','6','y','7','u','z','s','x','d','c','v','g','b','h','n','j','m'], | |
| t = 0, | |
| activeTones = [], | |
| ac = new (window.AudioContext || window.webkitAudioContext)(), | |
| o = ac.createOscillator(), | |
| gn = ac.createGain(); | |
| o.connect(gn); o.type = 'square'; o.start(0); | |
| gn.connect(ac.destination); gn.gain.value = 0; | |
| function playNote(f) { | |
| clearTimeout(t); | |
| o.frequency.value = f; | |
| gn.gain.value = .5; | |
| } | |
| function stopeNote() { | |
| gn.gain.value -= .05; | |
| if(gn.gain.value > 0 && activeTones.length === 0) | |
| t = setTimeout(stopeNote, 50); | |
| } | |
| function onKey(event) { | |
| var keyPressed = String.fromCharCode(event.keyCode).toLowerCase(), | |
| index = keyMap.indexOf(keyPressed), | |
| tone = noteMap[index], | |
| isDown = event.type === 'keydown'; | |
| if (!tone) return; | |
| if (activeTones.indexOf(tone) >= 0 && isDown) return; | |
| d.querySelector('.' + tone).setAttribute('s', !!isDown); | |
| if (isDown) { | |
| activeTones.push(tone); | |
| playNote(hzMap[index]); | |
| } | |
| else { | |
| activeTones.splice(activeTones.indexOf(tone),1); | |
| if (activeTones.length === 0) stopeNote(); | |
| else playNote(hzMap[noteMap.indexOf(activeTones[activeTones.length-1])]); | |
| } | |
| } | |
| noteMap = noteMap.concat(noteMap.map(function(note){return '_' + note;})); | |
| piano.innerHTML = noteMap.map(function(note, index) { | |
| return '<p class="' + note + '">' + keyMap[index] + '</p>'; | |
| }).join(''); | |
| while(t++ < 24) { | |
| hzMap.push(440*Math.pow(2,(t-33)/12)); | |
| } | |
| d.addEventListener('keydown', onKey); | |
| d.addEventListener('keyup', onKey); | |
| </script> | |
| <script id="jsbin-source-javascript" type="text/javascript">// ==ClosureCompiler== | |
| // @output_file_name default.js | |
| // @compilation_level ADVANCED_OPTIMIZATIONS | |
| // ==/ClosureCompiler== | |
| var d=document;d.body.innerHTML += '<p id="p"></p><style>#p{display:flex;flex-direction:row}#p>*{align-items:flex-end;justify-content:center;display:flex;padding-bottom:5px;width:50px;height:100px;color:#000;background:#fea;border-right:1px solid #fff;opacity:.8}#p>[class$="_"]{color:#fff;background:#000;position:absolute;height:50px;margin-left:-25px;z-index:1}[s*="t"]{opacity:1; margin-top: 25px;}</style>'; | |
| var piano = d.querySelector('#p'), | |
| hzMap = [], | |
| noteMap = ['c','c_','d','d_','e','f','f_','g','g_','a','a_','b'], | |
| keyMap = ['q','2','w','3','e','r','5','t','6','y','7','u','z','s','x','d','c','v','g','b','h','n','j','m'], | |
| t = 0, | |
| activeTones = [], | |
| ac = new (window.AudioContext || window.webkitAudioContext)(), | |
| o = ac.createOscillator(), | |
| gn = ac.createGain(); | |
| o.connect(gn); o.type = 'square'; o.start(0); | |
| gn.connect(ac.destination); gn.gain.value = 0; | |
| function playNote(f) { | |
| clearTimeout(t); | |
| o.frequency.value = f; | |
| gn.gain.value = .5; | |
| } | |
| function stopeNote() { | |
| gn.gain.value -= .05; | |
| if(gn.gain.value > 0 && activeTones.length === 0) | |
| t = setTimeout(stopeNote, 50); | |
| } | |
| function onKey(event) { | |
| var keyPressed = String.fromCharCode(event.keyCode).toLowerCase(), | |
| index = keyMap.indexOf(keyPressed), | |
| tone = noteMap[index], | |
| isDown = event.type === 'keydown'; | |
| if (!tone) return; | |
| if (activeTones.indexOf(tone) >= 0 && isDown) return; | |
| d.querySelector('.' + tone).setAttribute('s', !!isDown); | |
| if (isDown) { | |
| activeTones.push(tone); | |
| playNote(hzMap[index]); | |
| } | |
| else { | |
| activeTones.splice(activeTones.indexOf(tone),1); | |
| if (activeTones.length === 0) stopeNote(); | |
| else playNote(hzMap[noteMap.indexOf(activeTones[activeTones.length-1])]); | |
| } | |
| } | |
| noteMap = noteMap.concat(noteMap.map(function(note){return '_' + note;})); | |
| piano.innerHTML = noteMap.map(function(note, index) { | |
| return '<p class="' + note + '">' + keyMap[index] + '</p>'; | |
| }).join(''); | |
| while(t++ < 24) { | |
| hzMap.push(440*Math.pow(2,(t-33)/12)); | |
| } | |
| d.addEventListener('keydown', onKey); | |
| d.addEventListener('keyup', onKey);</script></body> | |
| </html> |
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Learn more about bidirectional Unicode characters
| // ==ClosureCompiler== | |
| // @output_file_name default.js | |
| // @compilation_level ADVANCED_OPTIMIZATIONS | |
| // ==/ClosureCompiler== | |
| var d=document;d.body.innerHTML += '<p id="p"></p><style>#p{display:flex;flex-direction:row}#p>*{align-items:flex-end;justify-content:center;display:flex;padding-bottom:5px;width:50px;height:100px;color:#000;background:#fea;border-right:1px solid #fff;opacity:.8}#p>[class$="_"]{color:#fff;background:#000;position:absolute;height:50px;margin-left:-25px;z-index:1}[s*="t"]{opacity:1; margin-top: 25px;}</style>'; | |
| var piano = d.querySelector('#p'), | |
| hzMap = [], | |
| noteMap = ['c','c_','d','d_','e','f','f_','g','g_','a','a_','b'], | |
| keyMap = ['q','2','w','3','e','r','5','t','6','y','7','u','z','s','x','d','c','v','g','b','h','n','j','m'], | |
| t = 0, | |
| activeTones = [], | |
| ac = new (window.AudioContext || window.webkitAudioContext)(), | |
| o = ac.createOscillator(), | |
| gn = ac.createGain(); | |
| o.connect(gn); o.type = 'square'; o.start(0); | |
| gn.connect(ac.destination); gn.gain.value = 0; | |
| function playNote(f) { | |
| clearTimeout(t); | |
| o.frequency.value = f; | |
| gn.gain.value = .5; | |
| } | |
| function stopeNote() { | |
| gn.gain.value -= .05; | |
| if(gn.gain.value > 0 && activeTones.length === 0) | |
| t = setTimeout(stopeNote, 50); | |
| } | |
| function onKey(event) { | |
| var keyPressed = String.fromCharCode(event.keyCode).toLowerCase(), | |
| index = keyMap.indexOf(keyPressed), | |
| tone = noteMap[index], | |
| isDown = event.type === 'keydown'; | |
| if (!tone) return; | |
| if (activeTones.indexOf(tone) >= 0 && isDown) return; | |
| d.querySelector('.' + tone).setAttribute('s', !!isDown); | |
| if (isDown) { | |
| activeTones.push(tone); | |
| playNote(hzMap[index]); | |
| } | |
| else { | |
| activeTones.splice(activeTones.indexOf(tone),1); | |
| if (activeTones.length === 0) stopeNote(); | |
| else playNote(hzMap[noteMap.indexOf(activeTones[activeTones.length-1])]); | |
| } | |
| } | |
| noteMap = noteMap.concat(noteMap.map(function(note){return '_' + note;})); | |
| piano.innerHTML = noteMap.map(function(note, index) { | |
| return '<p class="' + note + '">' + keyMap[index] + '</p>'; | |
| }).join(''); | |
| while(t++ < 24) { | |
| hzMap.push(440*Math.pow(2,(t-33)/12)); | |
| } | |
| d.addEventListener('keydown', onKey); | |
| d.addEventListener('keyup', onKey); |
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