Ms. Scheinman is a violinist who has been working out her own marvelous path through jazz from the 1920's and the 1960's and possibly the future - as well as calypso, French musette, Brazilian choro and about 10 other genres. In doing so, she has made remarkably cohesive albums; "12 Songs," with a septet including Bill Frisell on guitar, is her best so far.