Symetrix 628 Digital Voice Processor User manual

SymetrixInc. MountlakeTerrace,WA,USA Tel[phone] Fax[phone] 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
VERADECADEAGOSYMETRIXINTRODUCEDTHEVOICEPROCESSORtotheaudio
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
Topnotchvoiceprofessionalsnowdemand
personalized signal processing. T he Symetrix 628
givesyouthe abilitytocreateand storein
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 ID I remote, you can recall any of
the 628's 127 presets (plus the bypass preset) via
M ID I '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. If 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 ESH 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 E xpander/Gate affords more control
than its analog precursor. Independent R A T IO
and R E L E A SE controls allow tuning of the
expander/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. An output level meter
continuously monitors the 628's output. D igital
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 AE 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 D igital 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

Publication ©1998 Symetrix, Inc. SymetrixInc. MountlakeTerrace,WA,USA Tel[phone] Fax[phone] www.symetrixaudio.com
628 Digital Voice Processor
SPECIFICATIONS
Specifications subject to change without notice.
628
POWER
PHANTOM
ON
OFF
MICROPHONEANALOG LEFT LINE
RATE
SAMPLE
32kHz
44.1kHz
48kHz
SELECT
UNBALANCED
OUTPUT
S/P DIF ANALOG RIGHT
UNBALANCED
INPUT
SELECT
S/P DIF
AES/EBU
MIDI/RC-1 IN AES/EBU
MIDI
CHANNEL
MIDI
PROGRAM
1314
12
1
16
2
73
15
11
8
9
10
DUMP SELECT
628
DIGITAL VOICE
PROCESSOR
64
5
MIDI OUT/THRU
REMOTE CONTROL
MAXIMUM
15 WATTS
AC INPUT
RÉFÉREZ TOUTE RÉPARATION À UN TECHNICIEN QUALIFIÉ.
FABRIQUÉ AUX E.-U. PAR SYMETRIX INC., LYNNWOOD, WASHINGTON.
MANUFACTURED IN LYNNWOOD, WA, USA
DIGITAL OUTPUT
PROGRAM 2
PROGRAM 1
PROGRAM 4
PROGRAM 3
Inputs
Microphone Input Circuit Balanced Transformerless, Low Z (150 Ohms)
Phantom Power (DIN 45 596) +48 Volts, Nominal
Microphone Pad 15 dB (±3 dB)
Microphone Preamp Gain 15 dB (min.) to 75 dB (max.)
Microphone Equivalent Input Noise <120 dBV (20 Hz to 20 kHz)
Microphone Preamp CMRR >-60 dB (60 dB Gain, 20 Hz to 20 kHz)
Line Input Circuit 10k Ohm, Transformerless Balanced Bridging
Line Input Level at 0 dBFS -10 dBu to +21 dBu
Line Input CMRR >-40 dB (+20 dBu, 20 Hz to 20 kHz)
Dynamic Range Processor
Type DigitalCompressor/Limiter/Expander/Gate
Compressor Ratio Range 1:1 - 15:1
Compressor Release Time Range 250 mS. to 5.0 Sec.
Compressor Threshold Range -60 dBFS to 0 dBFS
Expander Ratio Range 1:1 - 10:1
Expander Release Time Range 250 mS. to 5.0 Sec.
Expander Threshold Range -60 dBFS to 0 dBFS
De-esser Type Digital Frequency Selective Compressor
De-esser Frequency Range 800 Hz to 12 kHz
De-esser Threshold Range -60 dBFS to 0 dBFS
Equalizer
Type Digital Three-Band Parametric
Bands 20 to 500 Hz, 160 to 6300 Hz, 680 to 20 kHz
Bandwidth Range .3 to 4 Octaves
Maximum Cut/Boost ±15 dB
Analog Output
Type Balanced Transformerless
Output Level at 0 dBFS +22 dBu Balanced, Jumperable
to +16 dBu or -20 dBu for mic level input
Minimum Load Impedance 600 Ohms Balanced or Unbalanced
Digital Output
Type AES3 and S/P DIF
Sample Rates 32 kHz, 44.1 kHz, 48 kHz
A/D & D/A Converters 20 bit, Delta-Sigma
Internal Delay <5 mS.
Overall Performance
Frequency Response ±1.0 dB (20 Hz to 20 kHz)
THD+Noise 0.05% (20 Hz to 20 kHz, +4 dBm Output)
MIDI Implementation
Access MIDI Program Change, MIDI Program Dump
Programs 8 Factory Presets, 1 Bypass, 119 User Presets, 128 Total
Physical
Size (hwd) 1.72 x 19 x 6.25 inches, 4.37 x 48.26 x 15.875 centimeters
Weight 5.5 lbs (2.5 kg) net, 10 lbs (4.6) shipping
Electrical
Power requirements 117V nominal, 105 to 125V AC, 50 to 60 Hz, 15 watts
230V nominal, 205 to 253V AC, 50 Hz, 15 watts