Symetrix Inc. Mountlake Terrace, WA, USA Tel (425)778-7728 Fax (425)778-7727 www.symetrixaudio.com
APPLICATIONS
On-Air microphone processing
Broadcast production
Video and film post production
audio sweetening
Live performance voice
processing
Analog to digital conversion
628
628 Digital Voice Processor
V E R A DE C A DE A G O S Y M E T R I X I N T R O DU C E D T H E V O I C E P R O C E S S O R to the audio
industry. N ow Symetrix unveils the 628 Digital V oice Processor, our latest design to meet the
needs of vocalists and voice talent. T he 628 rolls a premium quality microphone preamplifier, 20 bit
A/D and D /A converters, de-esser, expander/gate, compressor and parametric equalizer into a single rack
space unit. T he 628 combines proven digital signal processing and an easy to use analog-like interface
with the power of factory and user programmable presets.
FEATURES
Easy, intuitive operation - No
menus to step through
Precise parameter adjustment
with rotary knobs
128 processing presets
Plug & Play operation with 8
factory presets
Independent metering of
processing functions
AES3 or S/P DIF digital output
Microphone and line level inputs
T op notch voice professionals now demand
personalized signal processing. T he Symetrix 628
gives you the ability to create and store in
memory 119 custom presets. Y ou can get on the
air instantly by selecting from 8 finely tuned
factory presets.
N eed to provide a quick way for talent or
producer to change presets? Using a generic
programmable M IDI remote, you can recall any of
the 628's 127 presets (plus the bypass preset) via
M IDI's SysE x load program protocol.
T he 628's first stage is a proprietary
transformerless and capacitorless mic preamp
incorporating filters to destroy radio frequency
interference. A switchable 15 dB pad prevents
overloading by hot condenser microphones. A
front panel L E D indicates when phantom power
is on. I f you're into high end tube preamps then
you can select line level input from the 628's front
panel and bypass the 628's preamp.
T uning the 628's de-esser to the offending
frequency minimizes overly bright sibilance
without resorting to brute force equalization to
solve the problem. T he T H R E SH O L D control
lets you precisely apply this frequency selective
gain reduction. L E D metering displays the degree
of de-esser action.
T he 628's Expander/G ate affords more control
than its analog precursor. Independent R A T IO
and R E L E A SE controls allow tuning of the
ex pander/gate to fit any studio noise or performer
isolation requirements. An L E D meter shows the
amount of downward expansion or gating taking
place.
M ost compressor designs use a “ one size fits all”
approach to compression; the design of the 628
reflects the realization that voice and mixed music
require different design philosophies. W hile the
control complement is simple (T hreshold, R atio
and R elease), each has been highly optimized for
voice work. T he result is a compressor that can
tightly control gain (from hard compression to
gentle level control) with minimal or no side
effects.
T hree overlapping bands of digital parametric
equalization round out the processing power of
the 628. T he equalizer can notch out interfer-
ence, boost low frequency energy, cut mid-range
grunge and brighten a muddy, dull voice
simultaneously. T he 628's parametric approach
to equalization allows cuts and boosts exactly
where needed to make every voice sound
outstanding.
T hree seven segment L E D S display all parameter
values and preset numbers. A n output level meter
continuously monitors the 628's output. Digital
sample rates of 48, 44.1 and 32 kH z are selected
by a rear panel switch. Balanced and unbalanced
analog outputs as well as A E S3 and S/PDIF
digital outputs are provided.
All voices are different, but the right tool box
gives you all the functions you need to make
anyone sound their best. W ith its processing
power, programmable presets and digital output,
the Symetrix 628 Digital V oice Processor is the
complete voice processing tool box. •
O
-1 -2 -3 -6 -9 -12
MASTER
HIGHMIDLOW
PARAMETRIC EQ
SAVELOAD
NUMBER
PRESET
HEADROOM (dB)
LEVEL
OUTPUT
(dB)(Oct)
CUT/BOOST
(kHz)
FREQUENCY
BANDWIDTH
4(680-20kHz)(20-500Hz) (160-6300Hz) ACTIVE 2028 24 1216 8 CLIP
COMPRESSOREXPANDER/GATEDE-ESSER
MIC
PRE-AMP
(Sec)
RELEASE
(dBFS)
THRESHOLD
(X:1)
RATIO
RELEASE
(Sec)
RATIO
(X:1)
THRESHOLD
(dBFS)
(kHz)
FREQUENCY
75
-15dB PAD
NORM
15
GAIN
(dB)
628
DIGITAL VOICE
PROCESSOR
(dBFS)
THRESHOLD
PHANTOM
CLIP
ACTIVE -12 -18 -15 -6 -9 -3 ACTIVE -3 -9 -12 -6 -1 -2 ACTIVE
LINE
+20-12
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