"My LAB" is a language learning device.
You can practice the song with "My LAB".
As you follow the language tutorial, you can hear what you are speaking simultaneously.
So you can improve your language skill through comparing your pronunciation & accent to the language tutorial.
My LAB is personal music practice room.
Distinguished feature of Tone-deafness or Measure-deafness are they usually cannot heard their voice with accompaniment or reverse.
My LAB helps through earphones at the same time my voice and accompaniment by hear songs practice helps to effectively.