Jami'ar Oslo

LP (daga "dogon wasa" ko "dogon wasa"). Matsakaicin ma'ajiyar sauti ce ta analog, tsarin rikodin phonograph wanda ke da: gudun 33+1⁄3 rpm; diamita na 12- ko 10-inch (30- ko 25-cm), diamita; amfani da ƙayyadaddun tsagi na "microroove"; da vinyl (copolymer na vinyl chloride acetate), abun da ke ciki diski. Columbia Records ya gabatar da shi a cikin shekara ta 1948, ba da daɗewa ba aka karbe shi azaman sabon ma'auni ta duk masana'antar rikodin Amurka.http://www.tf.uio.no/english/research/groups/

 Nazari