Geyson

Vowels
Geyson has three basic vowel qualities: ⟨e⟩ (mid-front), ⟨o⟩ (mid-back) and ⟨a⟩ (low-back). The vowel ⟨e⟩ varies between [e] and [i~ɨ] depending on its environment. Each vowel may occur either short or long, and oral or nasalized, giving a total of 12 combinations. Vowels can also be pronounced with high or low pitch, i.e. Geyson has two tones. Length, pitch and nasalization are phonemic.