Organ Vs Piano: What Are The Main Differences in Touch?

Although organ and piano share the same order of keys on the keyboard, they have more differences than similarities in terms of touch. For prospective organists who have previous piano experience it is important to recognize and appreciate these differences. Understanding the different physical feeling when pressing piano and organ keys is vital for successful adaptation to the organ. Because of these differences piano players who want to start playing the organ must approach this instrument and press the keys not in the same manner as they would on the piano. In this article, I will describe the four main differences in touch between organ and piano.

Organ sound does not fade. Because of the hammer mechanics, the sound produced by piano strings begins to fade as soon as the keys are struck. The organ sound, on the other hand, can last indefinitely as long as the key is depressed and there is a constant air flow into the windchest. "The monster never breathes," - once said I.Stravinsky, one of the most important 20th century composers.
Organ dynamics are not achieved through the touch. While the dynamics on the piano can be produced by playing using more or less force, the sound on the organ can be made louder or softer using different means. The most obvious possibility for changing dynamics on the organ is by using various stop combinations. In addition, many organs have an enclosed division which has special shutters operated by the swell pedal. Opening or closing the swell division can also make the organ sound louder or softer.
Organs with tracker action have a breaking point. Differently from the piano, mechanical action organs have special breaking point on the keyboard which arises when the pressurized air suddenly goes into the pipe. As the key is depressed, at one point the pallets which are located underneath the pipes are opened with a sudden movement. This action produces some sort of "spitting" sound of the pipe.
Depression and release of keys are even more important on the organ. Since the organ sound can last indefinitely, organists must take great care to coordinate the attacks and releases of organ keys and pedals. The notes which have to be struck together must be depressed with absolute precision. On the other hand, in polyphonic music, the notes, which durations do not correspond, must be released exactly at the right time.

Every organist must understand the main difference in touch between the piano and organ and try play this instrument with a different approach. It is best not to use force on the organ and depress and release the keys with precision.

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