Gruppetti, or turns, are commonly seen in fast moving passages on all the notes of the major or minor scales. Thus it is worthwhile to practice them in isolation. This vocalise merely isolates them around the degrees of the major scale as it ascends. The quarter notes give you a little break, so this exercise really is a beginning exercise. Eventually, you should practice fast moving 16ths without breaks to increase endurance and accuracy.
Try it ascending and then descending on all vowels. Try to keep it in time with your metronome.
[sibembed score=”https://iansidden.com/wp-content/uploads/2009/06/Ascending-Grupetti.sib” height=”896″ width=”604″ align=”bottom”/]
Here’s a .png if you do not have Scorch installed.