Hummel's Toccata on the Easter "Christ is risen" is written for direct liturgical use in church services.
Hummel integrates the four opening lines of the cantus firmus (with the opening or title line emphasised four times) into a seven-part rondo variation according to the scheme A-B-A'-B'-C-B"-A". Up to this point, the melody part is always heard in the descant; only the acclamation "Kyrieleis" as the fifth line is entrusted to the pedal (mm. 31-33) in the quasi-coda formed after the descending whole-tone tetrachords of the C section (mm. 16-21). The rondo character thus does not result from the thematic-motivic substance, but rather from the texture of the sections, which are also metrised differently in themselves. What they all have in common is the unison leading of the right and left hands and - as far as the A and C sections are concerned - also of the pedal; the fourth-seventh arpeggios in the A and the parallel major triads in the B sections, which each conclude with a pedal solo whose fourth sequences are based on the first line of the chorale, create distance within this framework beyond the whole-tone tetrachords of the C section mentioned above.

Joachim Dorfmüller (in "Cantus-firmus-Toccata zwischen Tradition und Avantgarde", Kunst und Kirche 3/82)