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how to get the pitch of a triangle higher or lower?

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    You play it in a fast moving vehicle, while going past the listener. – Tim Nov 10 '17 at 17:44
  • Blobby are you asking if it's possible and how to permanently change the apparent pitch of a musical triangle? – Todd Wilcox Nov 10 '17 at 19:29
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    Are we talking isosceles or scalene, 'cos you can't alter the pitch of an equilateral... – Tim Nov 10 '17 at 21:13
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Interesting question! There are actually a few ways you can do so, both permanent and non permanent. The easiest would be to play the triangle in various positions. Try playing in the center of one side and compare to the sound of playing in the corner. You can also try playing in the center of the whole bar verses near one of the ends. The next easiest is changing your striking stick. A heavier, thicker rod will sound a bit lower than a thinner, shorter rod. Different materials sound slightly different as well. Note that both of these methods won't produce a huge difference in sound. The only way to radically change its pitch is to alter the length or thickness of the body, and at that point you're better off investing in another triangle.

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I know this might be stupid, but check this out: https://en.wikipedia.org/wiki/Harmonic

"On stringed instruments, harmonics are played by touching (but not fully pressing down the string) at an exact point on the string while sounding the string (plucking, bowing, etc.); this allows the harmonic to sound, a pitch which is always higher than the fundamental frequency of the string."

I haven't found anything on how idiophones vibrate, but i believe for a triangle it would be a transversal wave like a guitar string. With luck you may be able to hold it at any harmonic node to make a higher tone. Note that it will in that case sound muted and weak.

Also, to tune a triangle higher just remove material from the ends. Dunno why you would want this though.

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