Singers must quickly learn the vocal parts to the music and then perform them at a high level. They must master many techniques beyond just singing the parts, for example proper microphone technique, movement, and how to follow a conductor. They also need to take good care of their voice, since their instrument is physically part of their body and needs to stay healthy to sound good. This means understanding how the voice works and how to overcome vocal health challenges by practicing proper breathing, posture, and other techniques related to producing a consistently pleasing sound without damaging the vocal cords.