Peaches Etude (Finneas) Sample   Lesson Sample  (Early Intermediate Solo) Download version. Finneas Baird O'Connell, better known as Finneas, is a multi-talented singer-songwriter, producer, and actor who has written and produced music for many artists, including his sister, Billie Eilish. This instrumental piece captures all of the modern motifs of neo-classical piano and is not that difficult to learn "by ear." This lesson begins with a complete demonstration of the piece and then talks you through the entire arrangement, note-by-note, in two to four measure sections, describing every note and finger used to play this song. Each track breaks down the song in two to four measure sections so it is easy to navigate through the lesson track by track.