Luca Massaglia (http://www.lucamassaglia.com/) plays "Choral in E minor" (no. 3 from "Organ Book") by Jean Langlais (1907-1991).
"Choral in E minor" was composed by Jean Langlais in a Parisian cafe on a Sunday afternoon. The structure of this piece is very simple: a progression of six chords is played with both hands in alternation and then repeated a third higher. The highest note of each chord is then repeated as a melody on a reed stop with an alternate harmonization.