Matraz is a progressive metal band from Santiago, Chile. They started out as a four-member band in the late 90's, released the album Tiempo in 2001 and then hired an impressive female vocalist for the second album, Gritaré (released in 2004). Matraz is: - Loreto Chaparro (vocals) - Diego Aburto (keyboards) - Claudio Cordero (guitar) - Marcelo Stuardo (drums) - Jorge García (bass)