33
Setting Up
To fully enjoy playing this organ, please read the following section in this manual.
See the illustrated system structures of this organ on the left page.
TONE-WHEELS
e sound source or “engine” of Hammond Organ are the virtual Tone-wheels. ey are
like the strings and pick-ups on the electric guitar. While running, each of the 96 virtual
Tone-wheels oscillates at a diff erent frequency.
KEYS
e keyboards of the A-405SP are traditional 61-note organ keyboards, using the in-
clined and overhanging confi guration. is is the same as fi ne church pipe organs, while
retaining the quick response traditional of Hammond Organs.
DRAWBARS
e Drawbars select the basic sounds. Each bar adjusts the value of each harmonic.
PERCUSSION
e Percussion adds a sharp accent to the drawbar sounds. is is the same “Touch-
response” Percussion section as found on the classic B-3/C-3.
VIBRATO & CHORUS
Vibrato raises and lowers the drawbar pitch slightly, at an even and adjustable depth and
speed. e Chorus “doubles” the sound with the duplicate slightly sharp. is creates a
distinct richness, and is an essential part of the genuine Hammond tone.
NOTE: On the classic B-3/C-3 the chorus/vibrato e ect was obtained by an electro-mechanical
“scanner”. The A-405SP uses a digital model of that scanner, that gives an accurate repro-
duction of the original.
OVERDRIVE
Overdrive adds the fuzzy, raspy, “dirty” sound created by the vacuum tubes of a tube-
style Leslie Speaker when its volume is pushed past its sound limit.
e PEDAL Part, however, is designed not to pass through the Vibrato & Chorus or the
Overdrive, in order to obtain a clear Bass-line.
EQUALIZER, LESLIE and REVERB
e Organ signal passes through: the Equalizer (for tone regulation), the Leslie simula-
tor (for the rotating speaker eff ects) and the Reverb (for resonance).
If a physical Leslie speaker is connected to it, the sound of the Leslie simulator is output
from the built-in speaker, and a dry sound from the 11-pin socket.
EXTRA VOICE
e Extra Voice section has its own DSP unit (Reverb, Chorus, and Equalizer) which is
independent of the 96 virtual tone-wheel generator.
TONE-WHEEL SET
The Tone-wheel Sets are divided into the
Manual Keyboard and the Pedalboard. This
is to give the Pedalboard the Decay (= the
sound gradually fading out while pressing the
key) or Sustain e ect (= the sound gradually
fading out after the key is released).
HARMONICS
Harmonic is a pitch of a di erent ratio to a cer-
tain pitch; for example, the one octave higher
C to the middle C. The more Harmonics, the
brighter and richer sound is obtained.
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