Our work focuses on optically reconstructing the stereo audio signal of a 33 rpm long-playing (LP) record using a white-light interferometry-based approach. Previously, a theoretical framework was presented, alongside the primitive reconstruction result from a few cycles of a stereo sinusoidal test signal. To reconstruct an audible duration of a longer stereo signal requires tackling new proble...

Between 1924 and 1927 – and again in 1929 – the Phonogram Archives of the University of Zurich collaborated with Prof. Dr. Wilhelm Doegen of the Lautabteilung der Preussischen Staatsbibliothek zu Berlin in a dialectological recording campaign. Each year, Doegen was invited to travel to Switzerland from Berlin for a few days with his heavy recording equipment to collect a few dozen dialect speci...