The term CONCERT HALL CRY is often used to describe the enthusiastic response of an audience after a performance. This response is usually expressed by shouting 'ENCORE!' and clapping. An ENCORE is a request for a performer to continue playing or singing, and is typically six letters long. An amp, which is three letters long, is an abbreviation for amplifier, which is a device used to increase the volume of sound. An odeum is a five letter word that refers to a large, ancient Greek or Roman building used for musical performances. An ODEON is also a five letter word that refers to a modern concert hall or theater.