In the "Sempre semplice" collection, players might be misled by the sweeping "sempre" (always), for the twelve Organ Pieces op. 142 (I) contain some passages that are far from being "semplice." A number of pieces from this collection were derived from harmonium works, whereby Karg-Elert sometimes made quite radical changes when he revised the more than 20-year-old pieces, adding effects that were more idiomatic to the organ. In addition to being wonderfully suited for organ practice and teaching...