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He uploads videos on his homepage/fanpage
Federico R. He published the  videos

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there is a dangerous problem
the most dangerous problem is the erratic use of the larynx

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Fans watch the video on his fanpage

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the first video I show you
He talks about the raise of the larynx
It must be low to don't have problems.

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there is a problem that singers usually have (correction by the teacher)

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About-first

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I didn't understand

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foundamental things
There are three foundamental things

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There are 3 important techniques of opera singer

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There are 3 important techniques of opera singer

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The number one.

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Keeping the larynx low is one of the most important things in opera singing