IPA Source This link opens in a new windowIPA Source is a collection of IPA (International Phonetic Alphabet) transcriptions and literal translations of art songs and arias originally in Latin, French, Italian, German, and Spanish. IPA Source contains more than 7,400 texts, including more than 1,000 aria texts. Database features include audio recordings of many standard pieces designed to provide diction help to singers, as well as links to other online resources such as opera plots and libretti, song texts and translations, and online scores.