Fiesta Song Sample Lesson Sample (Downloadable) In this lesson you will learn the bass part to "Fiesta" by The Ramon Bermudez group without using music, tab, or print. In this "by ear" lesson the song is first demonstrated completely and then taught in four measure sections. At the end of the lesson you are given the backing tracks with no bass on them to practice and perform with. A Guitar By Ear lesson on this song is also available.