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Katz contends that before the advent of recording, vibrato added to a note was considered kitschy, tacky, and was universally frowned upon, unless one absolutely had to use it when playing in the uppermost registers. Vibrato as a technique, whether employed in a vocal performance or with a violin, helps mask pitch discrepancies, which might explain why it was considered “cheating.” As recording became more commonplace in the early part of the twentieth century, it was found that by using a bit more vibrato, not only could the volume of the instrument be increased (very important when there was only one mic or a single huge horn to capture an orchestra or ensemble), but the pitch—now painfully and permanently apparent—could be smudged by adding the wobble. The perceptibly imprecise pitch of a string instrument with no frets could be compensated for with this little wobble. The mind of the listener “wants” to hear the correct pitch, so the brain “hears” the right pitch among the myriad vaguenesses of pitch created by players using vibrato. The mind fills in the blanks, as it does with the visual gaps between movie and video frames, in which a series of stills creates the impression of seamless movement. Soon enough, conventional wisdom reversed itself, and now people find listening to classical string playing without vibrato to be painful and weird.
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