The use of this Phoenician letter for any vowel audio is due to early Greek alphabets, which adopted the letter "omicron" to stand for the vowel /o/. The letter was adopted with the worth in the Old Italic alphabets, including the early Latin alphabet. Spotify is unavailable on this https://musicainfantil88765.glifeblog.com/35929218/musica-infantil-for-dummies