User's Manual

Numa Compact 2/2x by Studiologic

Organ Model

Drawbars are a characteristic trait of a tone wheel organ, the-

refore we’ll explore them rst; a Tonewheel Organ sound can

be made of nine sine frequencies and each drawbar repre-

sents a harmonic of the scale related to the 8‘ stop of a pipe

organ (drawbar 3) which is also called “native pitch“.

Drawbar 1 2 3 4 5 6 7 8 9 correspond to Feet 16‘ 5 1/3‘ 8‘ 4‘ 2

2/3‘ 2‘ 1 3/5‘ 1 1/3‘ 1‘.

The labelling of the drawbars in feet derives from pipe or-

gans, where it represents the length of a reference pipe that

plays the note C is exactly 8 feet long (=2,4m).

Note: the rst two Sliders are made of a dierent color to

show that they play “below” the standard 8’ of a Piano, as it

also was on Vintage Tone wheel organs, where the rst two

Drawbars were Brown, the Even harmonics are were White

and the Odd harmonics were black. In the NC2x they main-

ly show that they are active on all sounds as controls of the

Synth parameters, while the other Sliders are enabled only

for the Synth Bank sounds.

When a drawbar is pushed all the way in, its harmonic is ab-

sent from the timbre, while the maximum volume for the

drawbar is achieved when you pull it all the way down and

you see the digit 8 on the Display, on a pop-up display that

appears any time you move a Drawbar/Slider. The drawbars

simply adjust the levels among them and you can change

and hear the timbre while keys are pressed.

With your NUMA Compact 2x you can play two dierent tim-

bres at the same time, on the Upper and Lower sections, in

Layer or Split mode as all other Sounds and the related Draw-

bars setting is shown on the Display according to the posi-

tion of the Focus (selection of Upper or Lower buttons) and

moving the Drawbars when the focus is on the selected part.

Drawbars

Numa Compact 2x