53
Using the Convenient Functions in Performances
When any of the “TW-Organ 1–10” Tones is selected for any of the INTERNAL Zone
(UPPER1, UPPER2, LOWER1, LOWER2), you can perform in “Tone Wheel mode,”
in which the creation of organ sounds is simulated.
An organ features nine “harmonic bars” that can be drawn in and out, and by using
the bars in different combinations of positions, a variety of different tones can be
created. Different “Feet” are assigned to each bar, with the pitches of the sounds
being determined by these “Feet.”
You can simulate the creation of tones using the harmonic bars by assigning Feet to
the ZONE LEVEL sliders.
While there are only four ZONE LEVEL sliders, you can switch the Feet setting by
turning the ZONE SWITCH buttons on and off, thus allowing you to assign eight
Feet settings to the sliders.
fig.Q2-11p
1
Bring up the Tone screen (p. 29), then press the [ORGAN].
If the Tone screen is not currently displayed, press ONE TOUCH [PIANO], then
press the [ORGAN].
2
Press the [INC] / [DEC] to select one of the “TW-Organ 1–10” Tone.
3
Press the CURSOR [ ] button.
The following Tone Wheel screen appears.
This Tone Wheel screen appears only when a Tone Wheel Tone is selected for one of
the Zone in the Tone screen.
fig.Q2-12g
Simulating the Creation of Organ Tones (Tone Wheel Mode)

What Are “Feet?”

Feet basically refers to the lengths of pipe used in pipe organs. The length of pipe
used to produce the reference pitch (the fundamental) for the keyboard is eight feet.
Reducing the pipe to half its length produces a pitch one octave higher; conversely,
doubling the pipe length creates a pitch one octave lower. Therefore, a pipe
producing a pitch one octave below that of the reference of 8’ (eight feet) would be
16’; for one octave above the reference, the pipe would be 4’, and to take the pitch up
yet another octave it would be shortened to 2’.

41

2,5

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