Triplets
A triplet is a three note sequence.
In this category (along with rolls and crans), a triplet is essentially an easier (or harder, depending on the note) variant of the roll or cran, just using all the same note.
It can be used instead of a D cran or a B roll, by tonguing it or throating it for emphasis. It's probably only really heard in any volume on the high D, where a cran is tough, a roll is tough, and in scenarios where X notes aren't really appropriate.
In practical terms, it's not really used that much on the whistle. It's handy on string instruments and on piano accordions, where it's actually easier to do than a roll, but it's actually easier to do a roll or an X note on a whistle, and they can sound much nicer than a triplet. It can be heard if learning tunes note-for-note from fiddlers and other instruments, and may fit with tunes written for those instruments.
The best example is D-D-D, all notes glottal stopped or tongued.
In this category (along with rolls and crans), a triplet is essentially an easier (or harder, depending on the note) variant of the roll or cran, just using all the same note.
It can be used instead of a D cran or a B roll, by tonguing it or throating it for emphasis. It's probably only really heard in any volume on the high D, where a cran is tough, a roll is tough, and in scenarios where X notes aren't really appropriate.
In practical terms, it's not really used that much on the whistle. It's handy on string instruments and on piano accordions, where it's actually easier to do than a roll, but it's actually easier to do a roll or an X note on a whistle, and they can sound much nicer than a triplet. It can be heard if learning tunes note-for-note from fiddlers and other instruments, and may fit with tunes written for those instruments.
The best example is D-D-D, all notes glottal stopped or tongued.