A singer is a person who conveys the intent of composer conveys the feelings of the composer came out while they must make people listen. Be recognized by composer's mood.
Singer is the person who conveyed the composer's intention. Convey a sense of the composer out as myself, I have to make people listen. Can recognize the emotions of the composer as well.
The singer is the person to pass on the culture of the composer. Convey a feeling of composer out while itself, it must make the audience. Can recognize the mood of the composer.