Begin with a search: Use a search engine like Google or a music-specific database to search for "Francis Poulenc Air Chantes". This should yield various web pages, articles, and sources of information.
Visit the composer's official website: If Poulenc has an official website or resource, check there for information about "Air Chantes" and other compositions.
Explore music encyclopedias and reference books: Look for entries on Francis Poulenc and "Air Chantes" in music encyclopedias, dictionaries, or reference books about classical music.
Consult music history books: Read music history books or biographies about Poulenc to learn more about his life, compositional style, and the context in which "Air Chantes" was written.
Check music libraries and repositories: If you have access to music libraries or repositories, browse through their catalogs to see if they hold scores, recordings, or additional materials related to "Air Chantes".
Explore recordings and reviews: Listen to recordings of "Air Chantes" to get a sense of its musical content. You can find recordings on music streaming services or physical media. Read reviews and critiques of these recordings to gain insights from experts.
Follow musician's interviews or documentaries: Look for interviews with musicians or documentaries about Poulenc and his music, where they might discuss "Air Chantes" and its significance.
Note that some information may be more readily available in French sources or materials since Poulenc was a French composer.
By combining these approaches, you should be able to compile a comprehensive understanding of Francis Poulenc's song cycle "Air Chantes".