Allen & Heath
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XONE:4D User Guide
MIDI CONTROL SECTION
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3
Rotary Encoders
Turning an encoder produces MIDI CC
(continuous controller) messages with a
unique controller number in two’s
complement binary encoding. Refer to the
MIDI mapping diagram for the differences
between Map 1 and 2 for these controls.
These encoders feature a built in
momentary push switch. Pressing down on
the encoder knob activates the switch and
sends a “note on” MIDI message, releasing
the switch sends a corresponding “note off”
message.
1
Rotary Potentiometers
T h e s e c o n t r o l s a r e s t a n d a r d
potentiometers with end stops and a centre
detent for easy setting. Turning a pot from
left to right will send MIDI messages with a
unique CC number and a control value
from 0 (fully left) to 127 (fully right).
2
Linear Faders
Moving a linear fader will send a MIDI
message with a unique CC number and a
control value from 0 (bottom) to 127 (top).
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2
4
5
6
Push Buttons
There are 24 momentary action switches
coded with letters A through to X for easy
identification. Pressing a switch will send a
unique “note on” MIDI message. Releasing
the switch sends a corresponding “note off”
message.
4
Rotary Encoder
A rotary encoder with switch, as above.
5
Jog Wheel
The jog wheel features an optical encoder,
which produces CC messages in a similar
way to the other encoders. Switches are
located at the top, bottom, left and right of
the wheel. Pushing down on the face of the
wheel sends note on / note off messages.
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7
Illuminated Push Buttons
Momentary action switches with red light
ring indicators. Pressing a switch will send
a “note on” MIDI message and turn on the
indicator. Pressing the switch again will
send another “note on” message and switch
off the indicator.
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