Create noteToFreq,js

noteToFreq,js

@@ -0,0 +1,47 @@
+function ntf(note, tune = "A4=440"){
+  tune = tune.split("=");
+  tune = {note: tune[0].split("="), pitch: parseInt(tune[1])};
+  tune.note = {letter: tune.note[0]], octave: parseInt(tune.note[1])};
+  note = note.split("=");
+  note = {letter: note[0], octave: parseInt(note[1])};
+  //check if octave is similar
+  if(note.octave == tune.note.octave){
+    if(note.letter == tune.note.letter) return tune.pitch;
+    return;
+  }
+
+}
+function interval(l1,l2){
+  while(l1 !== l2){
+    switch(l1[]
+  }
+}
+function cmp(l1, l2){
+
+
+
+}
+
+function accidentalToStrict(letter){
+  notesSharp = "C C# D D# E F F# G G# A A# B".split(" ");
+  notesFlat = "C Db D Eb E F Gb G Ab A Bb B".split(" ");
+  notes = "CC CD DD DE EE FF FG GG GA AA AB BB".split(" ");
+  switch(letter[1]){
+    case undefined:
+      return letter.repeat(2);
+      break;
+    case "#":
+      return notes[notesSharp.indexOf(letter)];
+      break;
+    case "b":
+      return notes[notesFlat.indexOf(letter)];
+      break;
+  }
+}
+noteMap = [];
+octave = -2;
+while(octave++ < 9) noteMap.push(...("CC CD DD DE EE FF FG GG GA AA AB BB".split(" ").map(letter=>(letter+octave))));
+function noteToMidi(note){
+  //figure out how to separate letter and octave
+  return noteMap.indexOf(accidentalToStrict(letter));
+}