Microgroove Frequency Test Record

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Release Date: 1957

Label: Decca

Long Playing Microgroove Full Frequency Range Recording

Decca records are made with a frequency characteristic which accords with British Standards 1928:1955.
This record conforms to the above characteristic with the exception of frequencies above 10 kc/s which are 6 dB below the standard curve. The recorded velocity at 1,000 c/s is 1.2 cm/sec., and r.m.s. levels are relative to 1,000 c/s (= 0 dB).

This record should be played at 33 ⅓ revolutions per minute with a pick-up using a point radius of .001 of an inch and with vertical force of not greater than 10 grams.

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