The use of this Phoenician letter for any vowel audio is due to early Greek alphabets, which adopted the letter "omicron" to signify the vowel /o/. The letter was adopted with the value within the Previous Italic alphabets, including the early Latin alphabet. Spotify is unavailable on this browser. https://musicainfantil89865.fireblogz.com/68391357/new-step-by-step-map-for-musica-infantil