Singers also learn to work with solo accompanists, or accompany themselves on an instrument. They learn all about how music is put together, so they can have input into the arrangement, figure out their best key for a song, and work together in groups with other singers, musicians, and producers. Most singers specialize in a specific style of music, such as pop, jazz, rock, musical theater, or opera. Other singers cover many styles or sing on jingles (music for advertising). Certain singers specialize in background vocals, which is surprisingly more difficult than singing lead since they must be able to blend their voice well in a group of singers.
