updated gist via ajax

askFifths.js

include('http://eerojohannes.com/midi/js/teoria.js')
var l = console.log.bind(console)

var keyboardPiano=["q","2","w","3","e","r","5","t","6","y","7","u"]

var intervals=["m2","M2","m3","M3","P4","A4","P5","m6","M6","m7","M7"]

l()

function getNote(nr){
    return teoria.note.fromMIDI(nr).toString(true)
}

function askRandomInterval(){
    var randomNr=Math.floor(Math.random()*11)
    var randomIntervalNr=Math.floor(Math.random()*10)
    randomNote=getNote(randomNr)
    randomNoteInterval=getNote(randomNr+(randomIntervalNr+1))
    l(randomNote+' '+intervals[randomIntervalNr]+'?')
}

function checkAnswer(inputNote){
    if(inputNote==randomNoteInterval){
        l(randomNoteInterval+" is correct")
    }
    else l(inputNote+"is INCORRECT, it's "+randomNoteInterval)
    
}

askRandomInterval();

function onKeyDown(event){
    
    var inputNr=keyboardPiano.indexOf(event.key)
    var inputNote=getNote(inputNr)
    if(inputNr!=-1)checkAnswer(inputNote)
    askRandomInterval()
}