It features balanced swell shoes / pedals with standard AGO placement, adjustable combination pistons, AGO Standard ( concave radiating ) pedalboard, crescendo pedal, reversible full organ / tutti thumb piston, reversible full organ / tutti toe stud, combination action thumb pistons, combination action toe studs, and coupler reversible thumb pistons.
22.
It features balanced swell shoes / pedals with standard AGO placement, adjustable combination pistons, AGO Standard ( concave radiating ) pedalboard, crescendo pedal, reversible full organ / tutti thumb piston, reversible full organ / tutti toe stud, combination action thumb pistons, combination action toe studs, and coupler reversible thumb pistons.
23.
Bach's musical plan has a multitude of structures : the organum plenum pieces; the three styles of polyphony, " manulaiter " and trio sonata in the Mass; the pairs in the Catechism, two with " cantus firmus " in canon, two with pedal " cantus firmus ", two for full organ ); and the free invention in the duets.
24.
There are generally two main types of reed stops : " chorus reeds " ( such as the Trumpet, Clairon and Bombarde ), whose main function is to blend with the flue stops and reinforce the full organ; and " solo reeds " or " orchestral reeds " ( such as the Clarinet, the Oboe, and the Cor Anglais ), which often ( but not always ) imitate orchestral instruments, and are used for quieter, solo passages ( similar to woodwinds in an orchestra ).
