Flautists use a lot of air....basically, they're just blowing into a cylindrical tube, so there's little resistance.
Well, however flutes work, breathing is a pretty big issue when playing them

. 21 measures of non-stop music means there will be breaths at some point....just to let you know

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I love music, Portugal, and soccer

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(me = formerly known as Verdi_lver. You can call me Dave if you wish)