The document discusses vocal and instrumental music. It defines vocal music as music sung by the human voice. Instrumental music is produced using musical instruments. Instrumental music is classified into four categories - string instruments, percussion instruments, woodwind instruments and brasswind instruments. Examples are provided for each category. The document also provides information on so-fa syllables and pitch names used in music. It asks students questions about their experience learning vocal and instrumental music and how they can improve their knowledge of music.