For the past nine years, every time Columbia recorded a major work, it made two master records, salted one secretly away for LP (Long Playing) day. Last week, LP day arrived.
In a Waldorf-Astoria suite, music critics gaped eagerly at Columbia's new LP Microgroove record—which might soon make present record changers obsolete. By tripling the number of grooves on a record (from approximately 100 to 300 to the inch) and by cutting turntable speed more than half (from 78 to 33 ⅓-r.p.m.), Columbia had produced a record that would play 45 minutes, include an entire symphony or concerto on one record....
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