Waldemar Bohner has been a close friend of Bertold Hummel since his student days. He worked for a long time as district cantor for the Odenwald/Tauber region and lived in Tauberbischofsheim until his death. Bertold Hummel dedicated the work: Meditation on "Veni, sancte spiritus" for organ op. 77a (1982) to his deeply devout friend.