The use of this Phoenician letter to get a vowel seem is due to early Greek alphabets, which adopted the letter "omicron" to represent the vowel /o/. The letter was adopted with the value inside the Outdated Italic alphabets, including the early Latin alphabet. Spotify is unavailable on this https://brooksluadh.blogolize.com/new-step-by-step-map-for-o-sapinho-e-a-borboleta-76115174