Keith McMillen QuNexus User Manual
QuNexus QuickStart Guide
Connect QuNexus to a computer:
This image shows QuNexus set up to send
MIDI data to a computer. Use a USB A-to-Micro
cable to connect the QuNexus micro port to a
USB port on a computer. QuNexus will receive
power from the computer.
Connect QuNexus to an iPad:
The image shows QuNexus connected to an
iPad via USB. You will need the iPad Camera
Connection Kit (sold by Apple: http://
store.apple.com/us/product/MC531ZM/A).
Attach the camera connector to the iPad and
then use a USB A-to-Micro cable to connect the
QuNexus micro port to the camera connector.
QuNexus Version 1.1.1
July, 2013
QuNexus is a vividly illuminated keyboard controller that is fun for beginners and a must for
professionals. It is a hub for new and vintage technology. Plug into your computer, iPad (Apple
Camera Connector required), or Android tablet via USB. Control hardware via 5-PIN MIDI (MIDI
Expander required) or control your modular synthesizers with the included CV inputs and
outputs.
QuNexus is a class compliant USB device that does not require a driver or software to function.
Out of the box QuNexus has everything needed to get started. This document is a quick guide
to getting started using QuNexus out of the box.
USB
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QuNexus is connected and powered using the Micro USB port on the left side of the QuNexus.
Connect QuNexus to MIDI hardware:
The image shows QuNexus connected to a
hardware MIDI device via our MIDI Expander
(sold separately):
1. Use a USB A-to-Mini cable to connect
the QuNexus Mini port (on the right side
of the QuNexus) to the USB “Expand”
port on the MIDI Expander.
2. Connect the power supply to the MIDI
Expander USB “Power” port.
3. Connect the MIDI Out on the Expander
to the MIDI In on a synth or other MIDI
device.
Connect QuNexus to MIDI hardware
(Powered by Computer):
The image shows QuNexus connected to a
Computer and a hardware MIDI device via our
MIDI Expander (sold separately):
1. Use a USB A-to-Mini cable to connect
the QuNexus Mini port (on the right side
of the QuNexus) to the USB “Expand”
port on the MIDI Expander.
2. Use a USB A-to-Micro cable to connect
the QuNexus micro port to a USB port on
a computer. QuNexus will receive power
from the computer.
3. Connect the MIDI Out on the Expander
to the MIDI In on a synth or other MIDI
device.
It is a class compliant USB device and does not require a driver. This allows for maximum
compatibility with an extremely wide range of other devices.
QuNexus has 3 virtual MIDI ports that communicate with the computer. Port 1 is the main port
on which the QuNexus sends and receives MIDI data to and from the computer or iPad. Port 2
and 3 can be used for this purpose as well but are also used for communication with other
devices. Port 2 is used for the KMI MIDI Expander (sold separately) and Port 3 is used for CV.
A computer or iPad can control the QuNexus LEDs by sending MIDI data into the QuNexus on
Port 1 (see the Controlling LEDs heading for more information).
MIDI
2
The KMI MIDI Expander is required to send and receive MIDI Data via 5-pin MIDI devices. The
Dimensions: 4” x 1.25” x 1.25” (inches).
Weight: 2.5 oz.
The KMI MIDI Expander is an optional
accessory, which enables use of QuNexus with
hardware MIDI devices. Plug the receiving MIDI
device into the MIDI Out port and QuNexus will
send MIDI data through a regular 5-pin MIDI
cable.
MIDI Expander can be used with or without a computer or iPad connected. Power is supplied to
QuNexus from the MIDI Expander’s power port when the MIDI Expander is plugged into a
power outlet. If connected to a computer (or iPad) and a MIDI Expander, power is supplied to
the QuNexus from the Micro USB port instead of the Expander.
The KMI MIDI Expander
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CV
Powered by a Computer (or iPad):
1. Use a USB A-to Micro cable to connect
the QuNexus Micro port to a USB port
on a computer or iPad. This connects
the QuNexus to power.
2. Use a cable that is compatible with your
CV device’s CV ports. Using adapters if
needed, make sure one end can plug
into one of the stereo 1/8in. CV out ports
on the QuNexus.
3. Plug your cable into the “Gate-CV1 Out”
port on the left side of the QuNexus.
Plug the other end into the desired
destination on your CV device.
Powered by KMI MIDI Expander:
1. Use a USB A-to-Mini cable to connect
the QuNexus Mini port (on the right side
of the QuNexus) to the USB “Expand”
port on the MIDI Expander.
2. Connect the power supply to the MIDI
Expander USB “Power” port.
3. See steps 2 and 3 from the “Powered by
a Computer” steps.
Powered by USB Power Supply:
1. Use a USB A-to-Mini cable to connect
the QuNexus Mini port (on the right side
of the QuNexus) to a USB Power
Supply.
2. Connect the Power Supply to a power
outlet.
3. See steps 2 and 3 from the “Powered by
a Computer” steps.
Connect QuNexus to Synthesizers or other CV devices:
The images to the right below show QuNexus connected to a CV device. There are 3 different
ways to set this up:
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QuNexus can communicate with synthesizers or other CV devices using Control Voltages.
Warning: QuNexus' CV In is uni-polar. If you send it a bi-polar signal, half of the signal will
be clipped and can cause malfunctions in extreme cases. Sending a signal above 5 Volts is
also unsupported.
Connect QuNexus to CV devices using a cable that is compatible with your CV device’s CV
ports. Using adapters if needed, make sure one end can plug into one of the stereo 1/8in CV out
ports on the left side of QuNexus. QuNexus’ CV input port (on the right side) requires one end to
be a 3.5 mm TRRS (like the ones used for Apple iPhone headsets).
CV Cable Kit
The QuNexus CV Cable Kit is an optional add on, which makes it easy to gather the cables and
adapters needed to convert MIDI to CV and vice versa using QuNexus.
One of each of the following cables/adapters is included in the CV Cable Kit:
CV INPUT:
right angle 3.5mm (1/8in) stereo plug to 1/4in stereo jack
This is helpful when connecting an Expression Pedal to the CV 1-2 in port
3.5mm (1/8in) stereo plug to 1/4in mono jack
This is helpful when connecting a Sustain Pedal to the CV 1-2 in port
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