![]() By this point the big record companies realized that creating a longer-playing record would require a tougher medium that could hold a smaller groove. ![]() The micro-groove or long-playing record technology built on advances that been available, but unused since the 1930s. The sound quality was not as good on these longer-playing discs as it was on the shorter-playing discs and so nothing beyond that was produced in the 1930s. In the 1920s, the Big Three laboratories (Columbia, Edison, and Victor) extended the playing time to seven or eight minutes, while Western Electric managed to push the limit to ten minutes in order to match the length of reel films. ![]() During the early part of the twentieth century, recording companies struggled to get beyond the three and four minute playing barriers that had been in place since the phonograph’s inception. ![]() The invention of the 33 1/3 long-playing record had its beginnings in the invention of the 78-rpm shellac disc.
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