[78-L] acoustic recording

[DAVID BURNHAM]

Indeed, the dates vary. Columbia actually discontinued 78s in the US in 1957, 
as did a few other labels (a very late RCA Elvis from '59 was mentioned here a 
few weeks ago) but Canadian labels kept 78s into 1959 and '60 in some cases. 
And the speed stayed in use for production libraries till 1968 because of 
superior fidelity and ease of cuing in studios.

dl

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Well that was a little mis-guided since, as pointed out here a few weeks ago, the Lp, with its micro-groove, was capable of higher quality sound than the 78 with its 3 mil groove.  A record with a 3 mil groove would have to rotate at 100 rpm to match the sound of a record with a 1 mil groove rotating at 33.3 rpm.

db