Parker, Steve. Arammba Organised Phonology Data: Western Province (South-Fly-Morehead District). 2005.
The low vowels /a æ/ are longer than the mid vowels /ɛ ʌ ɔ ø/, which are longer than the high vowels, which are longer than the short vowels.
There's vowel harmony between /ɜ̆ ʌ a u o/ and /ə̆ ɛ æ y ø/. /i/ is neutral.