Arp Schnitger’s early modern examples of this instrument inspired a 20th-century “reform” movement that championed Baroque practices such as the use of high-pitched mixtures. A piece (10[1])of music for this instrument begins with the three notes “G, high D, long B-flat” (10[1])and (-5[1])has the common nickname “little.” (10[1])The “Orpheus (10[1])of Amsterdam,” (10[2])Jan Pieterszoon (10[1]-5[1])Sweelinck (10[1])(“yahn Peters-sown SWAY-link”), was renowned (10[1])as a performer (10[1])of this (10[1])instrument. (10[1]-5[1])An 18th-century Büchlein (10[2])(“BYOOKH-line”) of music for this instrument (10[1])consists of chorale preludes. (10[1])The (10[1])Lübeck virtuoso Dieterich (10[5])Buxtehude’s (10[8])(“book-stuh-HOO-duh’s”) skill on this instrument (10[1])prompted an arduous journey (10[1])by a composer who later wrote a (10[1])Passacaglia and Fugue in C minor for it. For 10 points, name this primary instrument of J. S. Bach, (10[4]-5[3])which (-5[1])usually contains (-5[1])multiple keyboard manuals and (10[1])a (10[1])pedalboard. (10[3])■END■ (10[3]0[1])