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1

No, your facial expression has no direct correlation with the fundamental frequency you vocalise. However, smiling while singing does in fact tend to have a number of favorable side effects. Traditionally, when I've heard singing (usually choral) instructors explain this, they say that smiling will prevent you from going flat on a note, and that it also ...


3

The question is being asked with false premises.Smiling won't change the pitch. It will change the timbre or tone. Which may change the number or mix of overtones slightly, all of which will still be overtones of that original pitch. If the initial pitch is out of tune, then automatically any overtones or harmonics will be too. So in answer to your ...


2

The other answer is quite misleading. Holes do not just force nodes in the resonating waves. Consider you cover all holes but the bottom one, you'll hear a note 1 or 2 semitones higher than the lowest note (depending on the flute design), meaning the wavelength is 6-12% shorter. This is definitely not a harmonic selected from the original set. Also factor in ...


0

All sources I checked say that the triangle is of indefinite pitch. For example, the Percussive Arts Society has a fact sheet: https://www.pas.org/docs/default-source/pasic-archives/triangle. You can get different effects from different size triangles, and with different playing techniques, but apparently it is not possible to change the pitch as such, ...


2

You can partially submerge it in a tub of water. As more of the triangle is under water, the pitch will change.


3

In order to change the pitch of a triangle you would need to change its mass. You could make the triangle flatter or sharper by making it larger or smaller respectively.


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