In 1900, the Berlin company Mix & Genest began manufacturing magnetic sound recorders. The further development of Pulsen's Telegraphon did not take place until tube amplifiers became available in the early 1920s. Typical Berlin recorders, all of them with information carriers made of steel, were the Vox dictating machine, the Stille SEPMAG transport, the Echophone Dailygraph, and the Lorenz Stahlton-Bandmaschine (Steeltone-Tapemachine). In 1935 the AEG Magnetophon K1 started the magnetic tape era and by introducing ac biasing in 1940 and two-channel stereophonic technology in 1943, a previously unknown reproduction quality was obtained.

Author: Thiele, Heinz H. K.
AES Convention: 94 (March 1993) Paper Number: 3488
Publication Date: March 1, 1993 Import into BibTeX
Subject: Audio History and Technology
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=6655

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