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1、钢琴调律（Pianotuning）Thepianoisdividedintotwoparts:theadjustmentofpitchadjustmentandinternalmechanicaladjustment,somepeoplemistakenlybelievethattheharmonicaisthetuningisverywrong,ofcourse,therearealotoflawyersforvariousreasonshasalsobeendone.WhyshouldItuneup?Themain
2、pianosoundisnearly230stringswithcastironframeofwoodboardwithitevenpiecetogether.220multiplestringsaredividedintoseveralgroups,formingastringsystem:theaveragetensionofeachstringisabout90kilograms,andthetotaltensionofthewholepianoisabout20tons.Becausethestringsand
3、therackandsoundboardareelastic,tensioninthestrings,hasbecomealargecomprehensiveelasticstressinthebody,malletpercussion,stringsandtheroleofthelawofvibrationoftheelasticbody,theissueofmusic,becauseofthecomprehensiveelasticstressitselfisverylarge,andwillinfluenceof
4、temperature,humidity,airpressure,andconstantlyvibrationsound,sothepianointhemusicortheconstantlychanging.Ifthischangeisnotstandardizedandcorrected,thechangeoftenurewillcausethewholepianotobeinastateofconfusion.Whenthepianoisinuse,itisinastateofpercussion,andeven
5、doesnotrestalldayandnight.Thegreatertheexternalforceofthestring,themoreobviousthechangeis.Soheandmanymusicalinstruments(suchasviolin,erhu,guitar),theneedtokeeptuning(scordatura).Butfortunately,inthistypeofinstrument,thestabilityofthepianoisstrongest.(usuallylast
6、ingfor4--6months)andagoodtoneaftereverytuning.Therefore,pianotuningisanecessarymeanstomaintaintheexacttoneandtimbreofthepiano.Temperedpianoissound.Eachnoteonthepianocanrecognizesubtledifferencesbetweenthelegalsystem.Andexpandwiththeextensionoftimeandtheincreaseo
7、fthenumberofplay,willchangethenatureoftheinterval,sometimesmaybecomeunrecognizable,wuyinbuquan,"thisistoobigforlearningmusicharm,inthiscase,howtheXiqinwillenterintoarealstateofmusic?Becausetheconceptofthechild'svoiceisnotclear,whentheylearnmusicinpoorintonationo
8、nthepiano,willseriouslydamagethehearing.So,throughthepianotolearnmusic,itisnecessarytokeepits"pronunciation".Two,maintenanceandrepair:Pianoarrangementmaintenance:pian
