Professional recording singers exist outside of the entertainment industry in small numbers and are typically employed in marketing sectors for use in marketing jingles and advertisements. These singers will usually work as collaborators and writers of the pieces they sing and will work out of an office. Professional singers in the music industry are the most noted public figures in the singing profession. Professional singers record their tracks in studios and often will spend hours in the editing booth with producers. Singers at this level are considered to be at the top of the profession and often have demanding travel and work schedules. Singers will be required to tour cities for months at a time performing on stage and promoting their music in stores and events, and will have tour buses to live out of while on the road.