Objective: INTERVAL JUMPING ————Very Important! This makes you able to sing notes accurately that are more than two steps apart. Use all vowels.
Four notes in each section;
1) the root and the minor and the root and the major
2) the root and the subdominant and the root and the dominant;
First set- I & IIIb, I & III, and followed by ...
Second set- I & IV, I & V
Then step up a semi tone and do the two set sequences at that level. Do this through out your vocal range.
AKA = Set 1. the minor 3rd & the major 3rd, … and Set 2. the imperfect 4th & the perfect 5th
As you vocalize take a mental note and listen closely to the distance between root and the second note of a set.
Alternate the vowels every time you do a vocal range, so you do all the five vowels in your vocal range. Alternate the vowels order. You do this alternating vowel change each time you move up or down one semi tone. Alternate the vowels every session so you do all five. Alternate the jump vocalizing with pure tones and vibrato.
With time constraints allotted to practice, at least do the tuning of your vocal range twice using two vowels.
Occasional extra exercise: I & VI , I & VIIb, I & VII, I & VIII (an octave)