The voice is the oldest and most perfect instrument, while singing is a term for a specific manner of implementing the human voice in music.
The sound is produced by the vocal cords, and singing is considered a form of continuous speech on the breath.
Singers can perform with or without the assistance of musical instruments (a cappella).
The singing technique depends on the type of music being performed. In pop singing, the emotion transmitted to the listeners, along with solid vocal technique, is one of its main characteristics.
Professionally trained singers can pursue careers in almost any genre of music.
