Workshop mit George Brock-Nannestad

Workshop mit George Brock-Nannestad

Historical sound recording, in particular mechanical recording and reproduction of early records

Dienstag 15.05. (12:00 – 19:00 h)
Mittwoch 16.05. (11:00 – 18:00 h)

Filzengraben 8 – 10;
Klanglabor, 0.21;
KHM Köln.


– Recorded Sound as the Interplay Between a Carrier and a Machine (Lecture);
– Fundamentals of analog recording technology: the physical phenomena relied on
pressure variations → mechanical displacement of diaphragm → detection of displacement;
– The techniques used in practice in the historical period: cylinder, disc, film, magnetic (wire, tape);
– Especially mechanical: the geometrical differences in hill-and-dale and lateral;
– The dialectic triangle: speed, key, and standard pitch;
– Recording the signal, equalization;
– Acoustic recording and the signal processing that is the consequence – reproduction of acoustic recordings -
how to compensate;
– Noise reduction: an inflamed subject;
– Experiments in the acoustical behaviour of recording horns;
– Conclusions and final remarks.

Born in 1946, George Brock-Nannestad graduated in electronics and signal processing in 1971. He trained as a patent attorney, focussing on studies in musical acoustics, and in 1981-86 worked on the project ‘The establishment of objective criteria for correct reproduction of historical sound recordings’ funded by the Danish Research Council for the Humanities.
Brock-Nannestad became a European Patent Attorney in 1989, becoming involved with the School of Conservation of the Royal Danish Academy for Fine Art from 1991-98. In this latter role, Brock-Nannestad was responsible for research and tuition in preservation and restoration of carriers for sound, moving images, and data.
Since 1997 Brock-Nannestad has worked as a private consultant for Patent Tactics specialising in patents, restoration concepts and the history of AV technology. He is a member of IASA, AES, ARCS, AFAS, Newcomen Society, ICOM, and the Danish Musicological Society.

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