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Reed Plastic

need help with making a simple woodwind instrument?

so i made a little mouthpiece with a vibrating reed (plastic film) and it makes a nice steady sound. for the pipe, im trying to use very thick boba drink straws. i need to be able to play twinkle twinkle little star. the teacher gave it to us in terms of C, CI^2,CI^4, CI^5 etc. where do i put my holes? and would this even work?

It most certainly works. But it isn't easy to calculate exactly where to put the holes.
As the holes can't have an infinite area the effective length of the tube is always a bit longer than the position of the holes.
If you don't mind the instrument out of tune you can make an estimate but it can't be perfect.
If the length of the tube represents the lowest note you require then the effective lengths of the others correspond to 2, 4 , 5 ,7 and 9 semitones higher.

So let the length of the tube be L note C
then the other lengths must be L / ( 2 ^ (2/12) ) [0.89 L] D
L / ( 2 ^ ( 4/12) ) [0.79 L] E
L / ( 2 ^ (5/12) ) [ 0.75 L] F
L / ( 2 ^ (7/12) ) [0.67 L] G
L / ( 2 ^ ( 9/12) ) [ 0.59 L ] A

And of course the tune is CC GG AA G
FF EE DD C

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