The objects that classififed by noisemakers in twentieth century was sirens , typewriters , and automobile brakes. Noisemakers were added to make the tone color of the 20th century music richer and more interesting.
The invention of electronic instruments and the syntesizer in the mid 20th century was popular music and accelerated the development of new forms of music by noisemakers.
The entire system of keys that had dominated the musical landscape and renaissance was by many composer and it was dismissed in favor of what become known as serialism.
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