OASYS CX-3 Modeled Tonewheel Organ Guided Tour
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Pull the joystick towards you (-Y), to make use of a pre-programmed split, each half of the keyboard having its own set of
drawbars. The Upper Drawbars are linked to the Control Surface. As for the Lowers, note that the 16’ drawbar is colored
red: this is the ‘cursor’. The red drawbar is linked to the VALUE slider and VALUE wheel. Touch any drawbar, either Lower
or Upper and note that its position can now be adjusted by the VALUE fader and wheel.
Note: The Upper Drawbars default to always being linked to the Control Surface. We’ll see in a little bit how we can
customize the Control Surface to behave differently.
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On the display, press the tab labeled Keyboard Split. Besides Joystick –Y, you can enable a Split just by checking the box
labeled Split Enable. On this page you can:
1.
Change the Split point to any key. Highlight the default ‘B3’ in this example
>
Use the VALUE Slider or
Wheel to modify, or
*SHORTCUT*
Hold ENTER and press the desired key.
>
(Note: You are setting the
uppermost note for the Lower zone.).
2.
Independently shift the octave of the Upper or Lower zone. Try setting the Lower Octave Shift to +2.
Why This Is Cool: Organists will often set the Lower Manual as a chordal accompaniment to their soloing on
the Upper; or they find it useful to use the Upper and Lower as if they were two different ‘patches’, so that
they can change up their soloing with two different voices without any fuss.
3.
Change the source of the Split command. To review: AMS stands for Alternate Modulation Source Press
the popup after AMS: These are the wealth of sources you can apply for this Split message, or any
modulation message.
4.
A desirable AMS application for a organist would be to enable hands-free switching of the rotary speaker
speed
>
Press the Amp/ VC/ Rotary Speaker tab, then press the Rotary Speaker tab in the second row
>
In the Mode/Speed cell, locate the setting Speed SW: Slow, and notice the AMS popup which is
currently set to JS+Y
>
Press this popup and select Damper (CC#64) from the list: now your damper
pedal will toggle the rotary speed
>
Note that the AMS Mode parameter offers the choice of a Momentary
setting, so that the rotary would be fast only as long as the pedal is depressed.
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Concept: One of the most innovative features of Korg’s CX-3 Organ was the introduction of four additional
overtones (or drawbars) to the standard nine. Let’s explore how OASYS implements and extends this unique
idea:
1.
After selecting Program U-F-10, EX-Otones, press the smaller set of four drawbars in the second row
beneath Upper: this quickly takes you to the Extended drawbars. (Alternate navigation: Press EXi1
>
Press Basic: Notice that here you can select either Normal or EX Mode
>
Press Split/Drawbars
>
Press EX
Drawbars)
2.
Touch each EX Drawbar in Upper EX Drawbars to turn it red and extend all four out to their fullest using
the VALUE slider or wheel.
3.
After EX Drawbar Pitch Mode, select Custom
>
Touch the arrows under each of the EX Drawbars and
select 4’, 4’+3, 4’+6, and 2’+3: You now have the tones of a diminished seventh chord, something that
is not possible with the nine traditional drawbars alone! OASYS’ CX-3 Custom table allows you to set the
EX drawbars to any chromatic pitch you like, over a five-octave range!
4.
Note that if you Split the keyboard, you can also add four EX tones to the Lower!
