Crumar Mojo Desktop User manual

THE ULTIMATE

TONEWHEEL ORGAN

EXPERIENCE

USER'S MANUAL

Firmware version 1.00

www.Crumar.it

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Congratulations for purchasing your new Crumar Mojo Desktop. We are confident
that this instrument will be the perfect expansion to your live and studio setup, as well as
to your musical inspiration. Read through this useful manual to explore its capabilities
and, most importantly, have fun!

SAFETY INFORMATION

– Do not open the instrument. The instrument can be opened and repaired only

by qualified personnel. Unauthorized opening voids the warranty.

– Do not expose the instrument to rain or moisture.
– Do not expose the instrument to direct sunlight.
– Be careful not to infiltrate powders and liquids inside the instrument. Nor on

the outside.

– If liquids get inside the unit, remove the power immediately to prevent the risk

of electric shock and contact a service center as soon as possible.

– Do not clean using abrasive cleaners as they may damage the surfaces.
– Please keep all packaging in case you need to transport the instrument to a

service center.

– The instrument can be used in any Country that has a mains voltage between

100 Vac and 240 Vac.

– Do not touch the AC adapter with wet hands.

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WARRANTY

– Crumar Mojo Desktop is subject to 12 months manufacturer's warranty.
– Warranty extensions are at the discretion of the retailer.
– Damages caused by misuse, improper maintenance or transportation are not

covered by this warranty.

– During the warranty period, the customer is entitled to repair or replacement

of any parts considered defective at no charge.

– The possible replacement of the entire product is at the manufacturer's

discretion.

CHAPTER SUMMARY:

1. The sound of Mojo Desktop p. 4

2. The Command Panel p. 5

3. The Rear Panel p. 7

4. Display Pages p. 8

5. Global Settings p. 11

6. File Operations p. 12

7. Organ Edit Parameters p. 13

8. Effect Edit Parameters p. 14

9. The USB Ports p. 18

10. MIDI Map p. 19

11. Specifications p. 20

NOTES ABOUT THIS MANUAL

This manual can be considered a live document, as it may be updated in future
according to possible changes introduced in new firmware updates. We recommend
to keep an eye at the support section of the Crumar website and check for new
versions of both the manual and the instrument's firmware.

You will find that some concepts might be repeated more than once, this happens
because there could be a mention in a chapter, and a detailed explanation in a later
chapter.

We recommend you to read this manual with the instrument in front of you, so you
can put into practice what you are reading and can have an instant feedback of the
notions here explained.

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1. THE SOUND OF MOJO DESKTOP

VB3-II virtual tonewheel organ

The Crumar Mojo Desktop is the perfect hardware counterpart of the
most acclaimed tonewheel organ simulator virtual instrument
known as GSi VB3-II. It reflects the exact same sound engine, with the
same parameter set, mostly the same functions (considering the
difference between a software and an hardware instrument), and can
even exchange the same Programs and Banks of programs. While the

GSi VB3-II software can run on regular computers (Windows and
Mac), the Mojo Desktop is based on one of the most modern and dependable
embedded processing units, and doesn't need a full computer to run. Despite that,
the sound that is produced is 100% the same, with every single detail.

Main features:

• Full polyphony (61 upper + 61 lower + 25 pedals = 147 notes)

• 91 modeled tonewheels with accurate phase synchronization

• Adjustable leakage noise and cross modulation between tonewheels

• A total of 22 different tonewheel generators to choose from

• Generator shaping for a total of 154 generator combinations

• Adjustable global tuning from 430 to 450 Hz

• Foldback on 16" deactivatable

• Complex wheels

• Resistor wiring with multiple options

• Realistic “run” motor wow & flutter

• Busbars and 9 key contact simulation

• String Bass with adjustable release time

• Loudness "robbing" effect

• Single triggered percussion with natural capacitor discharge/recharge

• Adjustable Percussion Level & Decay

• Vibrato/Chorus virtual scanner

• Adjustable Vibrato Scanner depth & mix

• Dynamic tube overdrive simulation

• Spring Reverb (pre) and Digital stereo reverb (post)

• Rotary speaker simulation with virtual microphone positioning, tube overdrive, tube feedback

• Rotors "Front Stop" brake position with adjustable preferred position

• Upper and Lower manuals SPLIT with adjustable split point

• Supports pedal sustain

• Room for 128 Programs

• Color Touch 3,2” Display

• 9 Physical drawbars assignable to each of the 3 manuals

• Large Illuminated buttons for percussion, Chorus/Vibrato and Rotary Speaker control

• Large encoder knob for Chorus/Vibrato type selection

• Six potentiometers for immediate parameters

• Inputs for Swell Pedal and Foot Switch

• Two MIDI inputs

• Two USB host inputs

• Class-compliant USB-MIDI port

• Headphone output

• Balanced Stereo output

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2. THE COMMAND PANEL

In this chapter we get familiar with the command panel of the Mojo Desktop. Most of
the sound editing is done via the large color display in the middle of the panel, while
real-time performance commands are directly available on the panel under the form
of large illuminated buttons and knobs for an easy reach while playing music.

2.1 - KNOBS

From left to right, you have the volume, bass & treble equalization, keyclick volume,
overdrive level, and digital reverb level. These knobs are always active and are
internally connected to their respective parameters. The Volume knob is a general
volume by default, but can be optionally set to reflect the volume parameter stored
with each single Program.

PLEASE NOTE: the spring reverb effect level can only be adjusted from the appropriate
parameter from within the editing page, or from external MIDI CC message.

2.2 – ROTARY SPEAKER SPEED BUTTONS

The two buttons labeled BRAKE and SPEED are used to control the internal Rotary
Speaker simulator speeds. Push SPEED to switch between slow and fast, the light will
animate reflecting the rotation of the bass rotor. Push BRAKE to stop the rotation;
push BRAKE again to return to the previous speed. If the Memphis Style is active (see
parameter editing chapters), the light will not animate.

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2.3 - VIBRATO/CHORUS

Just like on the keyboard version of the Crumar Mojo, and like on a vintage
tonewheel organ, there are two large buttons for turning the effect on or off on the
upper or on the lower manual independently, and a large knob that lets you choose
the type of effect to use between the 6 possible combinations: V1, C1, V2, C2, V3, C3
whereas the 'V' produce just a vibrato effect and the 'C' produce a chorus effect. In
the Mojo Desktop the selector is a rotary encoder with 6 LEDs that indicate the
current selection. The LEDs will update according to the current Program.

PLEASE NOTE: just like on a vintage tonewheel organ, when the C/V effect is turned on
for the lower manual, it's also applied to the pedalboard tones.

2.4 - PERCUSSION

Like on the the vintage tonewheel organs, the command panel features the four
percussion switches that have the following functions, from left to right:

1. Turn the percussion on or off.

2. Select between soft or normal percussion volume.

3. Select between fast or slow decay.

4. Select the harmonic applied to the percussion tone.

PLEASE NOTE: the percussion is only present at the upper manual. Also, when the
percussion is active, the 1' drawbar will be muted.

2.5 - MANUAL SELECTION BUTTONS

The three buttons in the middle of the panel are used to select which of the three
manuals (upper, lower or pedalboard) the 9 physical drawbars shall control. The
respective LEDs indicate the active manual. They blink when MIDI note messages are
received for each manual separately, according to the note channels.

2.6 - COLOR TFT TOUCH SCREEN

The 3,2” display in the middle of the panel shows all the parameter editing pages,
global settings, Programs and other useful informations. It's mainly used to access
the sound editing without the need of an external unit. Next to the touch screen
there is a VALUE encoder with push-button. This can be used to switch between
Programs in the Home Page, or to insert values in the editing pages.

PLEASE NOTE: if you have troubles using the fingers for activating certain small items
shown on the screen, you might want to use a stylus, a pencil or just the tip of your
fingernails. This is a resistive touch screen, so any object will work for activating the touch
sensor.

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