StudioLogic NUMA-COMPACT2X User Manual

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Numa Compact 2/2x by Studiologic

Organ Mode

In an original tone wheel organ, 91 steel wheels with lobes

rotate in front of a pick-up consisting of a permanent bar

magnet and a spool. Because of the tone wheels shape, the

magnetic eld in the pick-up changes periodically and gene-

rates a sine wave.

With 8 dierent tone wheel shapes and 12 dierent gear trains

91 sine frequencies are generated. As in additive synthesis,

the 91 frequencies are the base for creating dierent sound

timbres. By means of a complex circuit lay out, the sound is

mixed thru nine drawbars, allowing a tone wheel organ to

create hundreds sound timbres from just 91 generated sine

frequencies: more than 380 million timbres are theoretical-

ly possible. To generate a sound, the NUMA Compact 2 uses

physical modelling, a mathematical implementation of the

tone wheel organ.

Thanks to the Modelling Technology, The Numa Compact

2 have been designed to give a wide variety of sounds, al-

lowing to build combinations using the drawbars and all the

related post eects: Vibrato, Chorus, Percussion with harmo-

nics and decay controls, plus specic GLOBAL Edit pages to

control features like the Key Click and Percussion separate

volumes.

The sound generated by the Organ Model can be sent to the

same Eects chain of all other Sound Banks, that can further

enhance the quality of the sound, with all possible eects

from the typical Rotary to the Drive, from Chorus to Delay

and many more. The Numa Compact 2 ORGAN Sound Bank

includes this new clone of a Tone Wheel Organs with Draw-

bars controls, with the addition of accurately sampled Elec-

tronic and Classic-Pipe organs, in a complete variety of or-

gan sounds of all kinds. The Organ sounds and all associated

eects and post-processing can be Stored in each of the 99

available Programs.

Introduction

Numa Compact 2x

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StudioLogic NUMA-COMPACT2X Numa Compact 2x 88-Key Portable Digital Piano