In the 1920s, engineers around the world were working on synchronising sound and image for the cinema. While large companies competed to find the best method, Bernhard Joseph Brenninkmeijer, co-owner of C&A, supported the priest Heinrich Könemann in developing sound film technology. Together they founded the ethically oriented film company Eidophon. The Draiflessen Collection in Mettingen presented this connection in an exhibition.

The result was an interactive cinema experience where visitors could select film clips to watch on the screen at the front of the exhibition space, complete with cinema seating. When not in use, the film clips played on a loop, creating a pleasant atmosphere in the exhibition space.

A digital exhibit was developed to illustrate the light-sound intensity method (Sprossenschrift). Visitors could explore a film of recorded Sprossenschrift and experience it in conjunction with the film's soundtrack. The exhibit effectively communicated the physical and technical aspects of the first sound film process to visitors in an accessible way.

By digitizing historic film brochures from the 1930s and making them available on iPads, visitors were given the opportunity to immerse themselves in a bygone era. In addition, an audio station featuring conversations with descendants of the featured individuals enriched the exciting tour, creating an even more immersive and multi-layered experience.