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When was the 45 rpm record invented?

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2011-03-24 15:15:35
2011-03-24 15:15:35

The 45 RPM record was developed by RCA Victor in 1949 as a competing format for the 33 1/3 RPM (33) format of rival Columbia records that premiered in 1948.

Eventually the 45 RPM format (7 inches in diameter with a one-inch center hole) was adopted for shorter recordings while 33 RPM (12 inches in diameter with a 1/4 inch center hole) was used for so called LP (long playing) albums. This eliminated the need to reduce the groove width or quality of 45 RPM recordings.

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The size of a 45 rpm record is 7inches.

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No; it was only ever an album track.

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They typically drag because that's how they make sound. If it didn't dray there would be no music. If you mean that it sounds slow, that is because as stated above, it is part of the process. Better turntables have a strobe to adjust the timing, or speed of the rotation to keep it at 33 rpm or 45 rpm or 78 rpm. Which brings me to the next part of the answer. Make sure that the speed of the turntable matches the speed of the recording. Playing a 45 rpm record at 33 rpm will sound very slow and dragging. Most record players and turntables have a selector for 33 and 45 rpm. 78rpm records use a different needle, and not all players will play these older format records.

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The most common 33-1/3 RPM record was 12", the 45 RPM was 7", and the 78 RPM was cut in both 12" and 16". Source: Wikipedia "also 10" vinyl"

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‎" In 1949, RCA-Victor developed and released the first 45 rpm record to the public, answering CBS/Columbia's 33⅓ rpm "LP". The 45-rpm record became the standard for pop singles with running times similar to 10-inch 78-rpm discs (less than four minutes per side).(One of the first of the extended 45-rpm recordings was a disc by Arthur Fiedler and the Boston Pops Orchestra featuring Tchaikovsky's Marche Slave and Ketèlbey's In a Persian Market.)" Henry Pienaar

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This was called an 45 RPM adapter or spindle adapter, since it allowed you to play 45-RPM records on a player with a regular long-play spindle.

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it is an adapter to put in the centre of a 45 rpm record to play on a regular turntable

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The number referred to the speed of the turntable in revolutions per minute (RPM). Vinyl records were recorded at various RPM. 33 1/3, 45, and 78

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A 7-inch is a smaller record which plays correctly at 45 rpm on a turntable. You may have to change your turntables speed to listen to it as intended.

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They were all on 33 rpm records. In that era, the vinyl record was the latest, most accurate rendition of audio available. CDs and MP3s were not invented at that time.

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If you are talking about 45 rpm records, 'singles', the plastic insert was called an adapter, or a spindle adapter. They allowed you to play 45's without the awkward 45 spindle you would otherwise have to insert.


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