Micheelsen's Organ Concertos (there are seven of them) are concert pieces for organ without orchestral accompaniment. This one is based on a song from Des Knaben Wunderhorn, "Es sungen drei Engel" (Three Angels were singing), also used by Gustav Mahler. We hear the first movement, the Tokkata.
This is one of the numbers on a recital that Wayne Fisher played at St. Thomas Church in New York City on June 8, 1975. The organ is Aeolian-Skinner Op. 205-A, also identified in the Pipe Organ Database (Organ Historical Society) as Gilbert F. Adams (1969), its sound made famous by Marcel Dupré in his recordings of Widor and Franck and his own music.
Hans Friedrich Micheelsen (1902-1973) was a North German neo-classic composer of vocal and instrumental music, especially for organ.
Wayne Fisher (1910-1985) taught organ for many years at the Cincinnati College-Conservatory of Music of the University of Cincinnati, and served as chairman of the organ department.