[1][2] Historian Paul Sparks labeled Wölki "the founding father of modern German plucked-string music.

[4] In 1961 he helped create the Bund Deutscher Zupfmusiker [de] (League of German plucked instrumentalists, BDZ), with members from his own D.M.G.B.

[1][3] Wölki is considered one of the first to contribute to the general recognition of the Zupforchester originating from the field of amateur music in scientific circles.

He did this through the historical exploration of the mandolin, through numerous original compositions and arrangements, but above all through the publication of textbooks for plucked instruments.

[5] In Suite Number 2 (1937), he incorporated small amounts of tremolo as a stylistic device, setting an example for future German compositions.

In 1972, Wölki gave the direction of the lute guild to his wife, who had led the Jugendzupforchester since 1953 and since 1958 the guitar choir of the association.

[1] Retired, he was also a member of the jury of the Jugend musiziert competition and regularly published for the journal Zupfmusik-Gitarre (today: Concertino) of the Bund Deutscher Zupfmusiker.