This video explains how a Columbia Model 201 portable gramophone acoustic works, made in 1928
It was made to compete against the HMV Model 101 portable gramophone
The price of £5 10s - the equivalent of almost £350 - was aimed at undercutting the HMV Model 101 which was priced at £7 - £450 at today’s prices
The Boyd Neel Orchestra are playing a 1947 Decca recording of Percy Grainger’s Mock Morris
Acoustic, pre-electric, recordings achieved a frequency range of up to 2,500Hz
With the advent of electrical recordings in 1925, the frequency range increased to about 8,500Hz
During the Second World War the Decca record company develop the FFRR (Full Frequency Record Response) which increased the frequency range to a remarkable 15,000 Hz from 1945. This was as a result of improving recording frequency range in records used to train SONAR operators during the war - underwater Radar used to spot German U Boats. All record companies began to adopt this technology after 1945. In the late 1950s Decca developed their system further for their new stereo records calling it FFSS - Full Frequency Stereo Sound
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