Mepụta ụdị nke ahịrịokwu a dị mgbagwoju anya The tremoloa, ọtụtụ tremoloas, bụ ngwá egwú nwere ụdọ nke sitere na ezinụlọ Chord nke ezinụlọ zither na-enweghị atụ.
N'ezie, ụdị okwu dị mgbagwoju anya nke ahịrịokwu ahụ bụ "The tremoloa, ọtụtụ tremoloas, bụ ngwá egwú nwere eriri nke sitere na ezinụlọ Chord nke ezinụlọ zither na-enweghị isi, mepụtara na America na nzaghachi maka mmụba ngwa ngwa na ewu ewu nke egwu Hawaiian n'oge 1920s, wee gaa n'ihu na-emepụta ruo 1950s. "