The whole piece lasts about six minutes, and comprises an 81-bar fantasia and an unfinished fugue, of which 27 bars are written. The fantasia has a very imposing structure and sound, the feel of which is created by the piece's one-measure generative theme. This theme passes between five contrapuntal voices of the organ, with occasional movement into new ideas; even the pedal bass is used for the theme. An interesting feature to the theme is that it contains many appoggiaturas, which provide the piece with a slight virtuosic feel; the harmonies especially contain many such devices. The fugue is written in 6/4 time and uses a simple half–quarter rhythm. It ends abruptly in the middle of the 27th bar after the exposition of the five voices is completed and a stretto passage begins.