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Jazz was brought into homes by the boom in radio broadcasting.
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Once tabletop phonographs hit the market, jazz musicians found themselves on top of the pop charts.
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Prohibition indirectly furthered the cause of Jazz by increasing the amount of speakeasies and live performances of jazz.
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Kansas City bands began to play a style with a four even beat ground beat. This paved the way for more modern forms of Jazz.
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Louis Armstrong revolutionizes the Jazz form by encouraging more solo improvisation over ensemble playing.
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Armstrong shifts base from Chicago to New York. This coincides with a general shift of the Jazz mainstream from Chicago to New York. Bigger Swing type orchestras will begin to dominate