Fidla (kutokaKiingerezafiddle; pia:violini, kutokajina laKiitaliaviolino) niala ya muziki yenyenyuzi.Idadi ya nyuzi ni 4 zinazopigwa au zaidi kuchuliwa kwauta. Nyuzi zinawekwa kwa kawaida kwanoti za G, D, A na E.
Fidla hufanywa kwamwili wamwangwi nashingo.Nyaya hufungwa juu kwenye shingo na hapo zinaweza kukazwa kwahesi. Upande wa juu wa mwili kunamashimo mawili yenyeumbo la S nyembamba.
Kwa kawaidamkono wa kuume hushika uta na kuiteleza kwenye waya na hivyo kutoasauti. Uta ni kamaupinde na kunariboni kati yancha za upinde. Riboni hufanywa kwanywele zafarasi.
Vidole vya mkono mwingine husogeza juu ya nyaya na kubadilisha sauti kwa kukaza waya mahali mbalimbali.
Fidla zilibuniwa katikaUlaya ya Kusini takriban miakaelfu iliyopita kama nakala ndogo za ala za nyaya kubwa zaidi.
Fidla kwa umbo la kisasa zimepatikana tangukarne ya 16 na mwanzoni zilikuwa na nyaya 3 pekee, lakini tangu mnamomwaka1600 zilikuwa karibu sawa na ala za leo.Maendeleo hayo yalitokea katikaItalia kaskazini. Baadaye mabadiliko madogo yaliendelea kufanywa.
Watunzi muziki wote mashuhuri waUlaya walitunga muziki kwa ajili ya fidla, ama katikaokestra ama kama ala ya pekee.
Kadiri fidla ilivyopendwa, idadi ya wapiga fidla iliongezeka pamoja na mahitaji ya idadi kubwa ya ala. Kwa hiyo fidla zabei nafuu zilitengenezwa katikaviwanda vidogo. Mwaka1888 kiwanda cha kwanza cha fidla kilianzishwa nchini Japani.
The Canon of Violin Literature, by Jo Nardolillo (2012), Scarecrow Press.ISBN 0-8108-7793-7
The Violin Explained - Components Mechanism and Sound by James Beament (1992/1997), Clarendon Press.ISBN 0-19-816623-0
Antonio Stradivari, his life and work, 1644-1737', by William Henry Hill; Arthur F Hill; Alfred Ebsworth Hill (1902/1963), Dover Publications. 1963. OCLC 172278.ISBN 0-486-20425-1
An Encyclopedia of the Violin, by Alberto Bachmann (1965/1990), Da Capo Press.ISBN 0-306-80004-7
Violin - And Easy Guide, by Chris Coetzee (2003), New Holland Publishers.ISBN 1-84330-332-9
Violins & Violinists, by Franz Farga (1950), Rockliff Publishing Corporation Ltd.
Viols, Violins and Virginals, by Jennifer A. Charlton (1985), Ashmolean Museum.ISBN 0-907849-44-X
The Violin, by Theodore Rowland-Entwistle (1967/1974), Dover Publications.ISBN 0-340-05992-3
The Early Violin and Viola, by Robin Stowell (2001), Cambridge University Press.ISBN 0-521-62555-6
The Complete Luthier's Library. A Useful International Critical Bibliography for the Maker and the Connoisseur of Stringed and Plucked Instruments byRoberto Regazzi, Bologna: Florenus, 1990.ISBN 88-85250-01-7
Violin Technique and Performance Practice in the Late 18th and Early 19th Centuries, by Robin Stowell (1985), Cambridge University Press.ISBN 0-521-23279-1
History of the Violin, by William Sandys and Simon Andrew (2006), Dover Publications.ISBN 0-486-45269-7
The Violin: A Research and Information Guide, by Mark Katz (2006), Routledge.ISBN 0-8153-3637-3
Per gli occhi e 'l core. Strumenti musicali nell'arte by Flavio Dassenno, (2004) a complete survey of the brescian school defined by the last researches and documents.
Gasparo da Salò architetto del suono by Flavio Dassenno, (2009) a catalogue of an exhibition that give complete informations on the famous master life and work, Comune di Salò, Cremonabooks, 2009.
