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He started in the '70s the rockgroup "Ensamma Hjärtan" ("The Lonely Hearts") together with fellow musician Gunnar Danielsson. They later formed the duo Danielsson & Pekkanini and had some radio hits in the 1980s. Pekkanini made his first solo albums in 1982 and 1986, "Pekkanini" and "Spotlight". Since the early '80s he has composed music for more than 100 Swedish theater plays all around the country. As a theremin player he has made 3 solo albums, Theremin Magic (2010), Theremins in the Jukebox (2011) and Theremin tunes played in odd bars (2013). He also produced an album with songs by Sardinian composer Enrico Pasini called Songs for which he arranged and interpreted Pasini's music for theremin.