ダルムシュタット夏季現代音楽講習会
In 1949, he attended seminars on music held at the Darmstädter Ferienkurse in Germany (including lectures by Leibowitz on twelve-tone technique, and talks by Messiaen and Fortner). Shortly after returning from Darmstadt, Lidholm wrote a brief piano work, "Klavierstück 1949". It is not directly inspired by Arnold Schoenberg's similarly titled piano piece, but Lidholm was familiar with it. "Fyra körer" (“Four choruses”) from 1953 also uses a free application of twelve-tone technique.