N'afọ 1912, ụlọ ọrụ na-ebipụta egwu egwu America bipụtara abụ atọ na-ewu ewu nke blues, na-eme ka Tin Pan Alley nakweere ihe ndị dị na blues: "Baby Seals' Blues", site na "Baby" Franklin Seals (Artie Matthews haziri ya); "Dallas Blues", site na Hart Wand; na "The Memphis Blues", site na W.C. Handy. Ajụjụ: Olee ụdị egwu ụlọ ọrụ na-ebipụta egwu egwu America mepụtara?
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