Magnitizdat (in Russian магнитиздат) is a term used to describe the process of re-copying and self distributing live audio tape recordings in the Soviet Union that were not available commercially. It is similar to bootleg recordings, except it is usually sanctioned by the performers (who do not expect to make money from these recordings) for the purpose of circumventing political censorship and making their work as well known as possible.
The process of magnitizdat was less risky than publishing literature via samizdat, since any person in the USSR was permitted to own a private reel-to-reel tape recorder, while paper duplication equipment was under control of the state.
Magnitizdat was the main method by which the songs of Russian bards such as Bulat Okudzhava, Vladimir Vysotsky, and Alexander Galich made their way around the Soviet Union and abroad. Magnitizdat was also used to distribute lectures with anti-Soviet content.
The word magnitizdat comes from "magnit" (magnet), which comes from the word "magnitnaya plyenka" (magnetic tape), and "izdat" (to publish).