The usage of this Phoenician letter for your vowel seem is due to the early Greek alphabets, which adopted the letter "omicron" to symbolize the vowel /o/. The letter was adopted with the value inside the Old Italic alphabets, including the early Latin alphabet. Spotify is unavailable on this https://hectorlubfj.laowaiblog.com/36008286/what-does-musica-infantil-mean