This plays the vowel after the consonants are cutting out. This makes it easier to perceive the similarities withing vowel groups and differences between vowel groups, regardless of consonant differences.

portion of [i:] of kusi:ɾa "to jump"
portion of [ɪ̂:] of kʊgɪ́:ka "to exagerate"
portion of [i:] of kuhi:nda "to protrude"
portion of [ɪ̂] of kʊ́sɪ́:nza "to slaughter"