Useful Console Code Thread

[korwynkim]

Hmm. That might end up working better than these
##909662 ##909646

[Jacob_]

Code:

loadInstrument(13);
var el = $('<input type="file" accept="audio/*">');
$(document.body).append(el);

el.on('change', function(e){
   var reader = new FileReader();
   reader.onload = function (e) {
       var context = new AudioContext();
       context.decodeAudioData(e.target.result, function(buffer){
           var node = context.createAnalyser();
           var resolution = 4;
           node.fftSize = 4096;
           node.smoothingTimeConstant = 0;
           var bufferLength = node.frequencyBinCount;
           var dataArray = new Uint8Array(bufferLength);
           var audioSource = context.createBufferSource();
           audioSource.buffer = buffer;
           audioSource.loop = false;
           audioSource.connect(node);
           var time = 0;
           audioSource.start(0);  
           setInterval(function(){
               node.getByteFrequencyData(dataArray);
               var f = [];
               for (var i = 1; i < dataArray.length - 1; i++) {
                 var isPeak = dataArray[i] >= dataArray[i-1] && dataArray[i] >= dataArray[i+1];
                 if (isPeak) {
                   f.push([i, dataArray[i]]);
                 }
               }
               f.sort(function(a, b){return b[1] - a[1]});
               for(var i = 0; i < Math.min(f.length, 4); i++) {
                 var frequency = f[i][0] * context.sampleRate / node.fftSize;
                 var note = piano[Math.round((piano.length*Math.log(2)+12*Math.log(55/frequency)+Math.log(4))/(Math.log(2)))];
                 if (note != undefined && f[i][1] > 32) {
                   song.addNote(new Note(song, note, time/resolution, 1/resolution, 13));
                 }
               }
               time++;
           }, song.sleepTime/resolution);
           setInterval(SequencerView.repaint, 1000);
       });
   }
   
   reader.readAsArrayBuffer(e.target.files[0]);
});

el.click();

this is dank

Agreed, I was considering doing something like this, but I thought it was impossible. Who knows, maybe I should try to outdo this.

The difficult part is converting a segment of audio to an array of frequency buckets, and that's completely handled by the Web Audio API. This could definitely be done better though, it just figures out the loudest 4 notes for each 1/16 interval and adds each one if the volume is above some arbitrary number.

If you put your programming knowledge to work at something more useful than stealing people's passwords you'd be surprised at what you can do. When I was 13 I wrote a file management program that was used by a web hosting company all because I hacked the 14 year old owner's script in 30 seconds and wanted them to have something better. https://buildism.net/php

[Guest]

HOLY SHIZA

[Jacob_]

HOLY SHIZA

yes

[LucentTear]

This will have a great impact on your creativity:

Code:

j = 0;
window.setInterval(function() {
    for (var i = 0; i < settings['numInstruments']; i++) {
        settings['instrumentColors'][i] = [Math.floor(Math.random() * 255), Math.floor(Math.random() * 255), Math.floor(Math.random() * 255)];
    };
    SequencerView.repaint();
    $('canvas').css('filter', 'blur(' + (Math.sin(j) * 8) + 'px)');
    j += 0.1;
}, 100);

What else can you come up with?

OS Super Secret Settings button when?

[Guest]

adding these to the console commands doc

[Jacob_]

super secret settings? console commands doc? I didn't know either was a thing

[Guest]

here you go jacob https://docs.google.com/document/d/1PBxf...sp=sharing

[Frank]

super secret settings? console commands doc? I didn't know either was a thing

Jacob_ only plays Classic Minecraft CONFIRMED
seriously though, super secret settings is a modern MC easter egg if you didn't know.

[Jacob_]

Slightly improved, also put the parameters at the top so it's easier to adjust. Does anyone know how to remove the annoying high frequency noise?

Code:

var resolution = 4; // how many times to subdivide each 1/4 note, 4 means 1/16 notes
var fftSize = 8192; // must be power of 2
var maxNotes = 6; // maximum number of notes to add for each interval
var minIntensity = 96; // minimum volume for note to be added (0-255)

loadInstrument(13);
var el = $('<input type="file" accept="audio/*">');
$(document.body).append(el);

el.on('change', function(e){
  var reader = new FileReader();
  reader.onload = function (e) {
      var context = new AudioContext();
      context.decodeAudioData(e.target.result, function(buffer){
          var node = context.createAnalyser();
          node.fftSize = fftSize;
          node.smoothingTimeConstant = 0;
          node.maxDecibels = 0;
          var bufferLength = node.frequencyBinCount;
          var dataArray = new Uint8Array(bufferLength);
          var audioSource = context.createBufferSource();
          audioSource.buffer = buffer;
          audioSource.loop = false;
          audioSource.connect(node);
          var time = 0;
          audioSource.start(0);  
          setInterval(function(){
              node.getByteFrequencyData(dataArray);
              var f = [];
              for (var i = 1; i < dataArray.length - 1; i++) {
                var isPeak = dataArray[i] >= dataArray[i-1] && dataArray[i] >= dataArray[i+1];
                if (isPeak) {
                  f.push([i, dataArray[i]]);
                }
              }
              f.sort(function(a, b){return b[1] - a[1]});
              var i = 0;
              var added = 0;
              var s = "";    
              while (added < maxNotes) {
                var frequency = f[i][0] * context.sampleRate / node.fftSize;
                var note = piano[Math.round((piano.length*Math.log(2)+12*Math.log(55/frequency)+Math.log(4))/(Math.log(2)))];
                if (note != undefined && f[i][1] > minIntensity) {
                  song.addNote(new Note(song, note, time/resolution, 1/resolution, 13));
                  added++;
                  s += "[" + note + " " + f[i][1] + "] ";
                }
                i++;
                if (i >= f.length) {
                   break;
                }
              }
              console.log(s);
              time++;
          }, song.sleepTime/resolution);
          setInterval(SequencerView.repaint, 1000);
      });
  }
 
  reader.readAsArrayBuffer(e.target.files[0]);
});

el.click();