A musician in a loft is an organist, which is someone who plays the organ. The organ is a keyboard instrument that produces sound by blowing air through pipes. It is one of the oldest instruments in the world and has been used in churches, concert halls, and other venues for centuries. Organists are highly skilled musicians who can play a variety of styles, from classical to jazz. They often accompany choirs or solo singers, as well as providing accompaniment for other instruments.