ORGAN Voice Section
156
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What Are “Horn” and “Bass?”
The basic Leslie Speaker design, as represented by the 122 and 147 families of cabinets, divides the sound
between “treble” (above 800Hz) and “bass” (below 800Hz). The treble frequencies are routed to a treble speaker
or “driver,” while the bass tones sound through a bass speaker (typically 15"). In the classic design, the speakers
themselves do not move - a baffle is rotated in front of each speaker to produce animation. The shape of the
baffle for the high frequencies is similar to the bell of a horn, hence the popular designation “horn.” The figure
below illustrates this.
The Leslie cabinet type shown above connects to the organ console by means of a special connector kit which
allows proper routing of both the audio signal and the electrical voltage necessary to operate the rotors.
The first Leslie speakers used two motors to rotate the baffles at a speed suitable for recreating theatre-organ-type
tremulant which were controlled by a toggle switch on the side of the speaker cabinet. In the mid-60's an
additional motor was added to both Horn and Bass which spun the rotors much more slowly to suggest the
sound of a “celeste,” or a compound organ stop with two or more ranks slightly detuned. Also added were
switches which could be mounted to the front of an organ console to allow the organist to control the rotor
speeds, and therefore the sound, while playing- “Chorale” described the effect produced by the Slow motors,
while “Tremolo” was the designation used when the Fast motors were engaged. The picture below shows a
typical Leslie switch of this kind.
In more recent years there have been two important additions to the classic Leslie design:
1.
The introduction of an 11-pin interface to allow a Leslie Speaker to handle more than one audio
channel, as well as to isolate line voltage from the audio signal path.
2.
The replacement of separate Fast and Slow motors with variable speed motors for both Horn and
Bass. The newer motor design reduces the total number of motors from four to two, and also
allows for “Brake” mode, or the ability to shut the rotors completely off (previously a special “brake
kit” had to be added to the cabinet to permit this feature).
HA<O>
SK PRO Reference Guide
Summary of Contents for Sk PRO
Page 1: ...REFERENCE GUIDE...
Page 2: ......
Page 4: ......
Page 5: ...TABLE OF CONTENTS...
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Page 19: ...INTRODUCTION...
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Page 29: ...INFORMATION CENTER DISPLAY...
Page 45: ...ALLOCATING VOICE SECTIONS...
Page 54: ...THIS PAGE INTENTIONALLY LEFT BLANK TO PRESERVE PAGE FORMATTING HA O SK PRO Reference Guide...
Page 55: ...COMBINATIONS PATCHES BUNDLES FAVORITES...
Page 137: ...ORGAN VOICE SECTION...
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Page 201: ...3PART ORGAN...
Page 209: ...UPPER PERCUSSION...
Page 215: ...PIANO ENSEMBLE VOICE SECTIONS...
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Page 291: ...MONO SYNTH VOICE SECTION...
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Page 345: ...CUSTOM SETS...
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Page 397: ...MULTI EFFECTS OVERDRIVE EQUALIZER...
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Page 473: ...SPECIAL PERFORMANCE FEATURES...
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Page 505: ...MIDI incl INT EXT ZONES...
Page 511: ...MIDI 493 MIDI Templates SK PRO HA O SK PRO Reference Guide...
Page 512: ...MIDI 494 MIDI Templates SK PRO HA O SK PRO Reference Guide...
Page 547: ...SPECIAL UTILITY FEATURES...
Page 567: ...Special Utility Features 549 t SYSTEM PARAMETER LIST HA O SK PRO Reference Guide...
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Page 569: ...USING MEMORY...
Page 591: ...APPENDIX...
Page 592: ...Appendix 574 APPENDIX u FACTORY COMBINATIONS HA O SK PRO Reference Guide...
Page 593: ...Appendix 575 u COMBINATION PARAMETERS HA O SK PRO Reference Guide...
Page 594: ...Appendix 576 HA O SK PRO Reference Guide...
Page 595: ...Appendix 577 u ORGAN PATCHES HA O SK PRO Reference Guide...
Page 596: ...Appendix 578 u ORGAN PATCH PARAMETERS HA O SK PRO Reference Guide...
Page 597: ...Appendix 579 HA O SK PRO Reference Guide...
Page 598: ...Appendix 580 u PIANO ENSEMBLE PATCHES HA O SK PRO Reference Guide...
Page 599: ...Appendix 581 HA O SK PRO Reference Guide...
Page 600: ...Appendix 582 HA O SK PRO Reference Guide...
Page 601: ...Appendix 583 u PIANO ENSEMBLE PATCH PARAMETERS HA O SK PRO Reference Guide...
Page 602: ...Appendix 584 HA O SK PRO Reference Guide...
Page 603: ...Appendix 585 u PIANO ENSEMBLE WAVEFORM LIST HA O SK PRO Reference Guide...
Page 604: ...Appendix 586 u MONO SYNTH PATCHES HA O SK PRO Reference Guide...
Page 605: ...Appendix 587 u MONO SYNTH PATCH PARAMETERS HA O SK PRO Reference Guide...
Page 606: ...Appendix 588 u PIPE ORGAN STOPS u ProChord VOICINGS HA O SK PRO Reference Guide...
Page 609: ...Appendix 591 u CUSTOM SETS HA O SK PRO Reference Guide...
Page 611: ...Appendix 593 u CUSTOM LESLIE PARAMETERS HA O SK PRO Reference Guide...
Page 612: ...Appendix 594 u SYSTEM PARAMETERS HA O SK PRO Reference Guide...
Page 613: ...Appendix 595 FAVORITES HA O SK PRO Reference Guide...
Page 614: ...Appendix 596 u MIDI TEMPLATES HA O SK PRO Reference Guide...
Page 615: ...Appendix 597 HA O SK PRO Reference Guide...
Page 616: ...Appendix 598 u MIDI INFORMATION HA O SK PRO Reference Guide...
Page 617: ...Appendix 599 u MIDI IMPLEMENTATION CHART HA O SK PRO Reference Guide...
Page 618: ...Appendix 600 u MIDI CHANNELS AND MESSAGES HA O SK PRO Reference Guide...
Page 622: ...Appendix 604 u DRAWBAR DATA LIST u SYSTEM EXCLUSIVE MESSAGES HA O SK PRO Reference Guide...
Page 624: ...2021 Hammond Suzuki USA Inc HA O SK PRO Reference Guide FM2330 1021...