![]() ![]() Service manual HOOO-OOO495,” Technical Report, Hammond Instrument Company, (Last viewed October 20, 2017)., sec. However, manufacturing and mechanical tolerances may lead to the generated sound including higher order harmonics ( Hammond Instrument Company, 1987 10. 1 1 The profile of the tonewheel is designed and cut in such a way that it induces a sinusoidal signal in the pickup. Each tonewheel induces a sinusoidal signal at the output of an electromagnetic pickup placed in front of it. Each of these is generated by a mechanical dented wheel (tonewheel), spinning driven by a synchronous AC-motor. The principle of use is that of a polyphonic additive synthesizer, whose oscillator bank consists of 91 quasi-sinusoidal signals. The Hammond organ, as patented by Laurens Hammond, is an electromechanical keyboard music instrument. University of California, Berkeley, CA., pp. Some of the reasons for this success can be traced back to the attack sound itself: the fast attack allows playing faster tempi with accurate rhythmic precision ( Ng, 2015 26. (īerkeley and San Francisco, CA, Milwaukee, WI)., pp. The Hammond Organ: Beauty in the B, 2nd ed. It was used in classical, gospel, rock, jazz and all sorts of popular music, as well as radio and TV shows, theatres, stadiums and other public venues, cruise ships ( Vail, 2002 32. Since the moment of its introduction, the Hammond organ was used in a variety of genres, far beyond the original aims of his inventor. The heritage of the future: Historical keyboards, technology, and modernism,” Ph.D. Regardless, many church communities were willing to accept this trade-off given the lower cost of the new instrument ( Ng, 2015 26. While offering a wide palette of sounds, its timbre was less rich in harmonics than pipe organs and the attack of the note on the Hammond was much faster and sharper, somehow limiting its realism as an emulation. The Hammond organ was originally designed and sold as a cheaper substitute for church organs. ![]() The control available at the fingertips of the musician is therefore such that it cannot be easily reduced to a single scalar velocity parameter, as is common practice in modern digital emulations of the instrument. It is concluded that the Hammond organ is a touch-responsive instrument and that the gesture used to produce a note affects the generated sound across multiple dimensions. A second study focuses on the listener's perception of the generated sound and finds that listeners can classify sounds produced on the Hammond organ according to the type of touch and velocity used. A study of the dynamic mechanical behaviour of the contact bounces is presented, showing that the velocity, the type of touch and, more in general, the temporal evolution of the key position, all affect different characteristics of the contact bounces. ![]() One of its main sonic features is the “key-click,” a transient that occurs upon note onset, caused by the mechanical bouncing of the nine electric contacts actuated during each key press. The Hammond organ is one of earliest electronic instruments and is still used widely in contemporary popular music. ![]()
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