▁to ▁have ▁made ▁its ▁way ▁from ▁New ▁Orleans ▁to ▁Chicago ▁in ▁ 1 9 1 5 , ▁when ▁migr ants ▁came ▁north ▁to ▁work ▁in ▁fact ories , ▁mill s , ▁and ▁stock y ards . ▁ ▁As ▁more ▁of ▁the ▁population ▁moved ▁north , ▁the ▁sound ▁developed ▁and ▁grew ▁in ▁popular ity . ▁In ▁ 1 9 2 2 , ▁Louis ▁Arm strong ▁followed ▁his ▁band ▁leader ▁Joe ▁" K ing " ▁Oliver ▁to ▁Chicago ▁from ▁New ▁Orleans . ▁He ▁showed ▁a ▁unique ▁talent ▁for ▁impro vis ation ▁and ▁quickly ▁became ▁jazz ▁sens ation . ▁For ▁ 3 0 ▁years , ▁he ▁defined ▁jazz ▁in ▁Chicago . ▁During ▁that ▁time , ▁Chicago ▁heard ▁a ▁number ▁of ▁jazz ▁gre ats ▁such ▁as ▁Earl ▁" F ath a " ▁H ines , ▁J elly ▁Roll ▁Mort on , ▁Er sk ine ▁T ate , ▁F ats ▁W aller , ▁and ▁Cab ▁Call ow ay . ▁ ▁Blues ▁also ▁came ▁to ▁Chicago ▁from ▁the ▁sout heast ▁during ▁this ▁period . ▁In ▁contrast ▁to ▁jazz , ▁bl ues ▁brought ▁a ▁som ber ▁tone ▁of ▁life ▁and ▁work ▁in ▁the ▁Mississippi ▁D elta . ▁Tow ards ▁the ▁end ▁of ▁the ▁Chicago ▁Black ▁Renaissance , ▁Chicago ▁started ▁to ▁change ▁the ▁sound ▁of ▁bl ues , ▁adding ▁drums , ▁piano , ▁bass , ▁harm onica , ▁and ▁switching ▁the ▁ac oust ic ▁guitar ▁for ▁electric . ▁ ▁The ▁new ▁style ▁was ▁called ▁Chicago ▁Blues . ▁Gre ats ▁such ▁as ▁Ch ester ▁Burn ett , ▁Will ie ▁D ixon ,