On October 14, 2007, we made a comparative surround recording at the Grand seminaire de Montreal chapel using three systems: a SoundField ST350, a AKG Blue Line Native B-Format assembly and a Zoom H2 portable digital recorder. This is the B-Format file from the AKG Native B-Format assembly. Three excerpts from the Livre d'orgue de Montreal: Voix humaine, Trio and Dialogue. Robert Sigmund, organ. Featuring Hugues St-Gelais, tenor. More details at http://www.radio.uqam.ca/ambisonic/comparative_recording.html