A concert is a live performance of music in front of an audience. The performance may be by a single musician, sometimes then called a recital, or by a musical ensemble, such as an orchestra, a choir, or a musical band. Concerts are held in a wide variety and size of settings, from private houses and small nightclubs, dedicated concert halls, entertainment centres and parks to large multipurpose buildings, and even sports stadiums. Indoor concerts held in the largest venues are sometimes called "arena concerts" or "amphitheatre concerts". Regardless of the venue, musicians usually perform on a stage. Concerts often require live event support with professional audio equipment. Before recorded music, concerts would provide the only opportunity one would generally have to hear musicians play. Informal names for a concert include "show" and "gig".Music is an art form whose medium is sound. Its common elements are pitch (which governs melody and harmony), rhythm (and its associated concepts tempo, meter, and articulation), dynamics, and the sonic qualities of timbre and texture. In its most general form the activities describing music as an art form include the production of works of music, the criticism of music, the study of the history of music, and the aesthetic dissemination of music.A talent show is an event where participants perform talents of singing, dancing, acrobatics, acting, drumming, martial arts, playing an instrument, or other activities to showcase skills. Many talent shows are performances rather than contests, but some are actual contests. In the instance of a contest, participants may be motivated to perform for a reward, trophy, or prize of some kind. For example, a high school might not have many students with any interest in performing in front of the student body for the sole purpose of performing alone and may offer different prizes as an incentive for these students to participate in the contest.