▁har p ▁singing ▁developed ▁in ▁the ▁early ▁ 1 9 th ▁century ▁as ▁a ▁way ▁for ▁it iner ant ▁singing ▁instruct ors ▁to ▁teach ▁church ▁songs ▁in ▁rural ▁communities . ▁They ▁taught ▁using ▁song ▁books ▁in ▁which ▁musical ▁not ations ▁of ▁t ones ▁were ▁represented ▁by ▁geometric ▁shapes ▁that ▁were ▁designed ▁to ▁associate ▁a ▁shape ▁with ▁its ▁pitch . ▁Sac red ▁har p ▁singing ▁became ▁popular ▁in ▁many ▁Oklahoma ▁rural ▁communities , ▁regardless ▁of ▁eth nic ity ." ▁Later ▁the ▁bl ues ▁tradition ▁developed , ▁with ▁roots ▁in ▁and ▁par alle ls ▁to ▁sacred ▁music . ▁ ▁Then ▁jazz ▁developed , ▁born ▁from ▁a ▁bl end ▁of ▁" bl end ▁of ▁rag time , ▁g ospel , ▁and ▁bl ues " ▁ ▁Ang lo - Sc ots - I r ish ▁music ▁trad itions ▁gained ▁a ▁place ▁in ▁Oklahoma ▁after ▁the ▁Land ▁Run ▁of ▁ 1 8 8 9 . ▁Because ▁of ▁its ▁size ▁and ▁port ability , ▁the ▁fiddle ▁was ▁the ▁core ▁of ▁early ▁Oklahoma ▁Ang lo ▁music , ▁but ▁other ▁instruments ▁such ▁as ▁the ▁guitar , ▁mand olin , ▁ban jo , ▁and ▁steel ▁guitar ▁were ▁added ▁later . ▁Vari ous ▁Oklahoma ▁music ▁trad itions ▁trace ▁their ▁roots ▁to ▁the ▁British ▁Is les , ▁including ▁cow boy ▁ball ads , ▁western ▁swing , ▁and ▁contemporary ▁country ▁and ▁western ." ▁Mexican ▁imm igr ants ▁began ▁to ▁reach ▁Oklahoma ▁in ▁the ▁ 1 8 7 0 s , ▁bringing ▁beautiful ▁can ciones ▁and ▁cor rid os ▁love ▁songs , ▁w alt zes ,