The anatomy of a vowel.
Every vowel sound your singers make is shaped by three things — and only three things — happening inside the mouth. Understand the three dimensions, and the entire IPA vowel chart stops being a wall of symbols and starts being a map of resonance.
What changes when a vowel changes.
Move any one of these three things and you'll land on a different vowel. Drag the sliders to feel the continuum — these aren't three discrete states, they're ranges.
Where the tongue sits.
The tongue gathers in one part of the mouth, leaving open resonance space in the other. Front vowels leave space behind the tongue; back vowels leave space in front of it.
Front vowels feel bright and forward. Back vowels feel darker, rounder, deeper in the throat.
How open the mouth is.
The jaw and tongue together control the size of the opening. Close vowels happen with a nearly-shut mouth; open vowels need the jaw dropped and the tongue lying low.
Close vowels feel narrow and contained. Open vowels feel spacious — your face changes shape to make them.
What the lips are doing.
The lips pull back wide or push forward into a small circle. This works independently of the tongue — same tongue position, different lips, completely different vowel.
Spread lips feel bright and forward. Rounded lips add warmth and darkness, even to a bright vowel.
Three sliders, one mouth, every vowel.
Move all three at once and the mouth responds in real time. The closest IPA vowel snaps into view above the diagram — drag through the space and feel how subtle shifts in tongue position, mouth opening, or lip shape land on completely different sounds.
Every vowel, mapped to the mouth.
The IPA vowel chart is a side-view of the mouth from the singer's right cheek. The horizontal axis is where the resonance space opens; the vertical axis is how open the mouth is. Tap any vowel to see what your mouth does to make it.
Tap any vowel.
Tongue arched high and forward, leaving open resonance space behind it. Lips spread wide. The brightest, most "smiley" vowel — the one you make when you say "cheese."
The pure five.
Most choral repertoire — Latin, Italian, much of the early music canon — uses just five pure vowels. No diphthongs, no glides, no slurring between shapes. Once your singers can land these five cleanly, the rest of the chart becomes accessible.
Bright and forward. Tongue high and front, lips in a slight smile.
"Keep it tall, not wide."
Pure "ay" — no glide. The trap is diphthonging into [eɪ]. Hold it steady.
"Land it and stay there."
The "tall ah" — wide open and forward. Not the dark "father" [ɑ], the bright Italian one.
"Open vertically, not horizontally."
Pure "oh" — no glide. The trap is diphthonging into [oʊ]. Lips round, hold, sustain.
"Round before you sing, not after."
The deepest, darkest of the five. Lips pursed forward, tongue pulled back and high.
"Whistle shape, then voice it."