The organ opens with the passacaglia bass/theme in low register, then answers it with an added upper voice. The form’s contract is set early: a repeating ground will carry the piece, while the surrounding counterpoint changes the weight and direction.

Successive returns thicken the texture and move the ground into a more active contrapuntal field. Around 1:10 the registration brightens; by about 2:20 the surface becomes more mobile, with running figures beginning to turn the stable bass into forward motion rather than mere recurrence.

The variations broaden into denser organ writing, reaching a fuller, darker weight around 3:30-3:50 and again near 5:35-5:55. These are not breaks from the passacaglia frame; they test how much mass the repeating pattern can hold before the texture clears back into more transparent motion.

After the heavier stretch, the music thins and reanimates. Rhythmic play and smoother legato passages alternate, keeping the ground present while shifting the listener’s attention between pattern, line, and accumulated weight. The final passacaglia span gathers toward a handoff rather than a stop.

The fugue enters without abandoning the earlier material: the subject grows out of the passacaglia’s shape and begins moving by imitation. Additional voices join, tightening the contrapuntal argument and carrying the piece toward its final cadence. The ending releases the held pattern only after the fugue has converted recurrence into forward drive.

The last sound falls into room silence. The form closes by letting the organ resonance finish the motion after the musical pattern has stopped.