Question: Jason Eckardt, is an American composer, he began his musical life playing guitar in heavy metal and jazz bands and abruptly moved to composing after discovering the music of Anton Webern, was an Austrian composer and conductor, and was at the core among those within, and more peripheral to the circle of what?
Sentence (from "Anton Webern"): As an exponent of atonality and twelve-tone technique, Webern exerted influence on contemporaries Luigi Dallapiccola, Křenek, and even Schoenberg himself.
Relevant evidence: No