Rossini’s “Petite Messe Solennelle” (1864) is composed for piano, harmonium and chorus. The first part, Kyrie, I arranged for 2x2-hands organ: First the Piano is recorded on RW, then merged with the recording of Harmonium and Chorus combined on HW and BW.
The result sounds probably a little more heroic than intended by Rossini on this baroque organ…