midistuff

_.md

[ Launch: midistuff ] 7863273 by jocafa

config.json

{"description":"midistuff","endpoint":"","display":"svg","public":true,"require":[],"fileconfigs":{"inlet.js":{"default":true,"vim":false,"emacs":false,"fontSize":12},"_.md":{"default":true,"vim":false,"emacs":false,"fontSize":12},"config.json":{"default":true,"vim":false,"emacs":false,"fontSize":12}},"fullscreen":false,"play":false,"loop":false,"restart":false,"autoinit":true,"pause":true,"loop_type":"pingpong","bv":false,"nclones":15,"clone_opacity":0.4,"duration":3000,"ease":"linear","dt":0.01,"thumbnail":"http://i.imgur.com/w0P0lCg.png"}

inlet.js

function log2(x) {
	return Math.log(x)/Math.LN2;
}

function midiToFreq(m) {
  return Math.pow(2, (m-69)/12) * 440;
}

function freqToMidi(f) {
	return 12*log2(f/440) + 69;
}

function midiToNote(m) {
  var notes = ['A', 'A#', 'B', 'C', 'C#', 'D', 'D#', 'E', 'F', 'F#', 'G', 'G#'];
  var octave = 4 + log2(midiToFreq(m)/440) | 0;
  return notes[((m-21)%12)] + octave;
}

function fretDistance(fret, scale) {
	return scale - (scale / Math.pow(2, fret/12));
}

var note = 65;
//console.log(midiToNote(note), midiToFreq(note));

console.log(fretDistance(4, 25))