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Path: utzoo!watmath!clyde!burl!hou3c!hocda!houxm!hound!rfg
From: rfg@hound.UUCP (R.GRANTGES)
Newsgroups: net.audio
Subject: Re: Record speeds
Message-ID: <636@hound.UUCP>
Date: Tue, 25-Sep-84 23:52:13 EDT
Article-I.D.: hound.636
Posted: Tue Sep 25 23:52:13 1984
Date-Received: Thu, 27-Sep-84 04:28:46 EDT
References: <13812@lanl-a.UUCP>
Organization: AT&T Bell Labs, Holmdel NJ
Lines: 12

[.]
I don't think anyone is now alive, certainly not on the net, who
remembers exactly why those particular speeds. The rationale for
around 78 rpm makes sense but doesn't convince. In the good old
days when 78 rpm was standard, the commercial or professional
standard was 33 1/3 rpm with transcriptions made on 16 inch
(if I remember right) discs. You could record a 30 minute radio
program on one side that way, I recall, which may have had something
to do with the choice. When LP records came along (also called
"microgroove records") the grooves were smaller and you could get
30 minutes on a 12 " record at 33 1/3.  RCA came out with 45 rpm
just to be difficult.       -Dick Grantges  hound!rfg