Читать книгу Practical Organ Building онлайн

11 страница из 25

One step further. The theoretical length of the lowest note is not only used to designate that note and the pipes which belong to that note, but is extended to the designation of the whole set of pipes of which it is the lowest or longest. This whole set of pipes is called familiarly a Stop; thus we have at once the ready terms, 8-feet stops, 16-feet stops, 4-feet stops, 2-feet stops, &c.; and it will be understood that by an 8-feet stop, we mean a set of pipes yielding the common or ordinary pitch of the pianoforte, or of the human voice; while a 4-feet stop, when the very same keys are pressed down, will yield notes one octave higher than this ordinary or standard pitch; the 2-feet stop, notes two octaves higher; the 16-feet stop, notes one octave lower, or deeper. And if all these four stops are played at the same time, (tuning and other manipulations being now assumed), an effect will be produced highly agreeable to the ear, and vastly superior to that which would result from the mere multiplication of 8-feet stops only.