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I'm afraid I have to correct myself here.
A triplet is a group of three short notes. That's correct.
But I just realized that you can distinguish two kinds of triplets.
The one that I mentioned (the diddely), but there's also also a short triplet, that is being used as an embellishment.
The short one doestn't fit "diddely" at all, because it's too fast for that. You hear them all the time, especially in waltzes.
Music is mathematics. You might stretch it like taffy but it is all coherent to the time. A triplet is three notes in place of one, period. How you play these notes might make them sound different but the principle is still the same.
I only know this from studying an endless stream of music theory when I first started playing the pedal steel guitar circa 1972. Those suckers will get your eddicachun of all things musical up and running in a hurry...
So - y'all can use computers but find the idea of three notes played in one beat rather than two notes played in one beat something about diddling. Outstanding.