A sideman is a professional musician who is hired to perform or record with a group of which he or she is not a regular member. They often tour with solo acts as well as bands and jazz ensembles. Sidemen are generally required to be adaptable to many different styles of music, and so able to fit smoothly into the group in which they are currently playing. Often aspiring musicians start out as sidemen, and then move on to develop their own sound, a name, and fans of their own, or go on to form their own groups. Some examples of this are:
Some sidemen become famous for their musical specialties, and become highly sought-after by pop, rock, blues, jazz and country music bands. Examples of some of these include multi-instrumentalists. David Lindley is a multi-instrumentalist who has worked with such diverse musicians as Curtis Mayfield, Dolly Parton, Jackson Browne, and Hani Naser. Lindley used his time as a sideman to discover and master new instruments while on tour around the world, becoming proficient on ethnic instruments rarely seen in Western music genres. He has mastered so many that he admits to losing count, and instead placed a photo gallery of them on his website.