Studiologic Numa Organ 2 Manuale d'uso
Pagina 12
NUMA ORGAN 2 by Studiologic®
12
Operation / Drawbars
Drawbars are a characteristic control of a tone wheel organ.
In the text the drawbars of the Numa Organ 2 are indicated by co-
loured highlighted digits as shown below.
The drawbars can be used to create a wide range of sounds of the
Numa Organ 2.
Each drawbar represents a different harmonic related to the 8‘ stop
of a pipe organ (the 3rd drawbar) which is also called “native pitch“.
Drawbar
1
2
3
4
5
6
7
8
9
Feet
16‘
5
1/3
‘
8‘
4‘
2
2/3
‘
2‘
1
3/5
‘ 1
1/3
‘
1‘
Harmonic
related to 8‘
-
-
1.
2.
3.
4.
5.
6.
8.
Harmonic
related to 16‘
1.
3.
-
-
-
-
-
-
-
Note: The labelling of the drawbars in feet derives from pipe organs, where
it represents the length of the pipes. For the 8‘ stop of a pipe organ the pipe
of the note C is exactly 8 feet long (=2,4m).
The colouring of the drawbars is very intuituive:
Brown drawbars add frequencies below the native pitch. They are
also used to adjust the timbre for Pedal. White drawbars are related
in octaves to each other, where the 3rd drawbar (native pitch) re-
presents the fundamental. Finally the black drawbars add fifths and
a major third to the timbre.
When a drawbar is pushed all the way in (until you can‘t
see any digit), its harmonic is absent from the timbre. The
maximum volume for the drawbar is achieved, when you
see the digit 8. There are seven more volume positions in
between to add the harmonics of each drawbar to the timbre.
• Drawbars
Drawbars
1 2
3
4
5
6
7 8
9
• Upper
• Lower
• Pedal