You turn on the radio and hear a song. Turned the knob; now sounds kind of choral work, and on the next wave, it seems, broadcast Opera... All - vocal music (from Latin vocalis - sounding, singing), that is music intended for singing with the accompaniment of musical instruments or unaccompanied, solo, ensemble or choir.
To vocal music includes songs, songs, choruses, cantatas, oratorios and finally Opera.