Page "Miles Davis" Paragraph 36
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Wikipedia
Even though he was supposed not to speak at all for ten days, he had an argument with somebody and raised his voice.
This outburst damaged his vocal cords forever, giving him the characteristic raspy voice that came to be associed with him.
"[...] in February or March 1956, that I had my first throat operation and had to disband the group while recovering.
During the course of the conversation I raised my voice to make a point and f *** ed up my my voice.
I wasn't even supposed to talk for at least ten days, and here I was not only talking, but talking loudly.
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