34
H U I R E F E R E N C E G U I D E
RS-232, RS-422 serial port connection
Two industry standard serial communication
protocols, requiring different 9-pin wiring
schemes. HUI’s RS-232/RS-422 serial port can
be used with either type of connection, deter-
mined by switching to the appropriate protocol.
RS-232 uses unbalanced drivers and receivers,
in which one wire is used per signal. RS-422
uses balanced, or differential, drivers and re-
ceivers, which require two wires per signal.
RS-232 works well for short runs (up to 50
feet), while RS-422 is recommended for longer
runs (up to 1000 feet).
surround-sound
Multi-channel audio playback systems in 4, 5,
or 6 channel formats. Surround-sound is typi-
cally found in movie theaters and home
theater systems. HUI’s control room section
can accommodate up to six discrete (separate)
audio channels, for use in what is termed “5.1
surround.” (4.1 surround can also be monitored
with HUI.)
touch-updatable motor fader
HUI’s fader knobs are made of conductive
metalized plastic, which respond immediately
to touch control via capacitive contact between
the neutral (ground) control surface and the
user. The fader motor uses a high resolution,
tightly-tuned servo amplifier, which moves the
fader knob and stem along a conductive plastic
fader track.
Operationally, when you touch the knob, the
motor disengages from the fader via internal
and software control, concurrently sending out
positional status from HUI to the DAW mixer
map over MIDI or other serial communication.
When you release the fader knob(s), the motor
re-engages via control information from the
DAW mixer map.
VFD
Abbreviation for vacuum fluorescent display.
HUI’s VFD is an 80-character (40 characters by
2 lines) display that shows channel strip DSP
functions and other HUI operation parameters.
V-Pot™
Abbreviation for virtual potentiometer, the V-
Pot is considered a “soft knob” because it
performs various functions determined by the
DAW software being used with HUI. It acts as
a continuous or variable controller and also re-
flects current value or position via its
surrounding 12-segment LED collar.
COLOPHON
For Mackie Designs:
The HUI Reference Guide was written and
edited by MARSHALL GOOCH and BRIAN
McCULLY. Additional contributions came from
Dave Franzwa, Jeff Gilbert, Paul Larson, Carl
Malone, Wayne Newitt, and Mackie’s Tech
Support Crew. Thanks also to Tom Bain for
the tutorials.
Layout, design, and graphic tweakage by
GOOCH, from an original concept by Ron
Koliha. Original graphics by Sara Delahan.
Additional photo tweakage by Bruce Yunker.
Proofreading and additional editing by LINN
COMPTON.
This manual was produced using a whole
(Sammamish) slough of software, including
Adobe
®
PageMaker
®
, Illustrator
®
, and
Photoshop
®
; Microsoft
®
Word, Deneba Canvas 5,
and some other super-cool applications whose
names we can’t remember. The machines used
were Apple Macintosh
®
and Mac-clone models
of varying degrees of difficulty, with many ex-
citing third-party peripherals and fun
doohickeys attached.
For Digidesign:
For contributions to the product and great
interaction, in an amazingly patient and posi-
tive manner, thanks go to: Dave Lebolt, Mike
McRoberts, David Kwan, Mike Rockwell,
Dave Conry, Eomann Faye, and Dave Frokker.
GLOSSARY / COLOPHON
®
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