Nå skruva fiolen (Now screw the violin) is Epistle No. 2 in the Swedish poet and performer Carl Michael Bellman's 1790 song collection, Fredman's Epistles. The epistle is subtitled "Till fader Berg, rörande fiolen" (To father Berg, about the violin). It is both about and mimicking the rhythm of playing the violin. The scholar Lars Lönnroth comments that Bellman used the resemblance of a cello to a woman's body, certainly pretending to play it as such for laughs, while the use of words like "screw" in the lyrics was similarly explicitly obscene. The Bellman interpreter Fred Åkerström recorded the song on his 1974 album Glimmande nymf.

Carl Michael Bellman is a central figure in the Swedish ballad tradition and a powerful influence in Swedish music, known for his 1790 Fredman's Epistles and his 1791 Fredman's Songs.^[1] A solo entertainer, he played the cittern, accompanying himself as he performed his songs at the royal court.^[2][3][4]

Jean Fredman (1712 or 1713–1767) was a real watchmaker of Bellman's Stockholm. The fictional Fredman, alive after 1767, but without employment, is the supposed narrator in Bellman's epistles and songs.^[5] The epistles, written and performed in different styles, from drinking songs and laments to pastorales, paint a complex picture of the life of the city during the 18th century. A frequent theme is the demimonde, with Fredman's cheerfully drunk Order of Bacchus,^[6] a loose company of ragged men who favour strong drink and prostitutes. At the same time as depicting this realist side of life, Bellman creates a rococo picture, full of classical allusion, following the French post-Baroque poets. The women, including the beautiful Ulla Winblad, are "nymphs", while Neptune's festive troop of followers and sea-creatures sport in Stockholm's waters.^[7] The juxtaposition of elegant and low life is humorous, sometimes burlesque, but always graceful and sympathetic.^[2][8] The songs are "most ingeniously" set to their music, which is nearly always borrowed and skilfully adapted.^[9]

Lars Lönnroth writes that Bellman had the cello play the role of Ulla Winblad's body; contemporary instruments, and indeed his own cittern, were topped by a small carved head of a woman, above the tuning pegs. On the intervention of the cello in each stanza, marked "V:cllo" in the text, he states that Bellman certainly pretended to play the instrument, lewdly gliding his hands up and down its body and making everyone laugh. He puns on "skruva" ("screw", a tuning peg in the head of a stringed instrument, and the verb for "to screw") also in Epistle 7, Fram med basfiolen, knäpp och skruva, "Som synes vara en elegi, skriven vid Ulla Winblad's säng, sent om en afton" (Which seems to be an elegy, written by Ulla Winblad's bed, late one evening). Its opening lines are "Fram med basfiolen, knäpp och skruva, V:cllo --- skjut skruven in; pip och kuttra som en turturduva V:cllo --- för makan sin" (Out with the bass viol, pluck and screw, Cello --- push the screw in; twitter and coo like a turtle dove Cello --- for his wife). Lönnroth comments that the ambiguity about the instrument here turns to explicit obscenity.^[16]

The Epistle was recorded live in Stockholm's concert hall by Cornelis Vreeswijk, Fred Åkerström and Ann-Louise Hanson as the first track of their 1964 folk music album Visor och oförskämdheter.^[17] Åkerström also recorded the song on his 1974 studio album Glimmande Nymf, where it formed the first track. His guitar and vocals were accompanied in his group's arrangement by Katarina Fritzén on flute and vocals, and Örjan Larsson on cello; the recording omits the last stanza.^[18][19][20] It was recorded, too, by Bosse Forssell on his 1999 album Porträtt av Bellman. The Epistle is sung in English by the tenor Torsten Mossberg, accompanied by Jonas Isaksson on guitar and Andreas Nyberg on violin, on the 2020 classical album Är jag född så vill jag leva/Am I Born, Then I'll Be Living.^[21]