History
Magnetic recording was proposed as early as 1888 by Oberlin Smith, who published 1888-09-08 in The Electrical World as "Some possible forms of phonograph". By 1898 Valdemar Poulsen had demonstrated a magnetic recorder and proposed magnetic tape. Fritz Pfleumer was granted DE 500900 for a "Sound recording carrier" on 1928-01-31, but it was later overturned in favour of the earlier US 1653467 by Joseph A. O'Neill.
Read more about this topic: Tape Bias
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