Vocal tract controls
| Jaw Position | ||
| Open | Closed | |
| Tongue Position | ||
| Front | Back | |
| Tongue Shape | ||
| Flat | Bunched | |
| Tongue Expansion | ||
| Narrow | Wide | |
| Lip Aperture | ||
| Closed | Open | |
| Lip Protrusion | ||
| Least | Most | |
| Larynx Height | ||
| Low | High | |
| Glottal Aperture | ||
| Open | Closed | |
| Fundamental Frequency | ||
| Low | High | |
| Soft palate (velum) opening | ||
| Closed | Open | |